soal rcsa-w volume a

Soal RCSA-W Volume A


1. How many separate TCP sessions exist for each optimized connection?

A. 1 B. 2 C. 3 D. 4 E. It depends on the WAN visibility mode

Answer: C Penjelasan: Setiap koneksi optimized flow terdiri atas 3 koneksi unik TCP, dan koneksinya pun 1 to 1. Yaitu:

1. Dari Client ke Client Side Steelhead 2. Antar Client Side Steelhead ke Server Side Steelhead 3. Dari Server Side Steelhead ke Server

2. Which of the following is a valid type of in-path rule on the Steelhead appliance? (Select 3)

A. A Pass Through B. B Dynamic Detection C. C Auto Discover D. D Fixed Target E. E Real-time

Answer: A, C, D Penjelasan: Ada 5 tipe in-path rule di Riverbed Appliance, yaitu:

1. Pass-through rules

Define traffic to pass-through (not optimize) 2. Auto-discovery rules

Define traffic to auto-discover (optimize) 3. Fixed-target rules

Manually define traffic and Steelheads to optimize (no auto-discovery) 4. Discard

Packets are silently dropped

5. Deny The connection is reset

3. Users at an optimized branch office log off and close down Microsoft Outlook when they leave for the day. When they return in the morning the Steelhead appliances data store is already warm for emails they

received throughout the night. What is this feature called?

A. Transparent Proxy B. MAPI Prepopulation C. MAPI Offline Optimization D. Connection Pooling E. MAPI Tunneling

Answer: B Penjelasan: With MAPI pre-population, the Steelhead appliance can start acting as if it is the mail client. If the client closes the connection, the client-side Steelhead appliance will keep an open connection to the server-side Steelhead appliance and the server-side Steelhead appliance will keep the connection open to the server. This allows for data

to be pushed through the data store before the user logs on to the server again. The default timer is set to 96 hours, after that, the connection will be reset.

4. What is the default QoS classification mode?

A. Flat

B. Hierarchical C. WRED



D. LLQ

E. FEC

Answer: A Penjelasan: Steelhead appliances menggunakan HFSC QoS scheduling algorithm, dengan default mode pada HFSC adalah Flat

5. To help secure the server private key on the server-side Steelhead appliance, which of the following features

can be used? A. TACACS+ authentication B. RADIUS authentication C. Secure Vault D. Datastore encryption

Answer: C Penjelasan:

The secure vault contains sensitive information from your Steelhead appliance configuration, including SSL private keys and the RiOS data store encryption key. These configuration settings are encrypted on the disk at all times using AES 256-bit encryption.

Referensi: Steelhead® Appliance Deployment Guide. Chapter 18. Authentication, Security, Operations, and Monitoring. Halaman 344

6. What is the packaging distribution format for the Virtual Steelhead appliance? A. Open Virtual Appliance

B. Open Virtual Image C. Open Virtual Release D. Open Virtual Source E. Open Virtual Package

Answer: A

Penjelasan: The Virtual Steelhead image is an installable Open Virtual Appliance (OVA) package. OVA is a platform-independent, efficient, extensible and open packaging distribution format. The OVA package provides a complete specification of the Virtual Steelhead model V250L, including its required virtual disks, CPU, memory, networking, and storage. Referensi: Virtual Steelhead Installation Guide, Version1.0 (RiOS v6.1.1), September 2010, Chapter 2 Installing

and Configuring the Virtual Steelhead, halaman 18

7. Application Streamlining in a Steelhead appliance or Steelhead Mobile does what?

A. Reduces round trips over the WAN for all TCP traffic B. Reduces round trips over the WAN for supported applications C. Gives applications priority using our QoS engine

D. All of the above Answer: B

Penjelasan: Application Streamlining mengurangi round trip melewati WAN untuk aplikasi yang didukung oleh Riverbed,

diantaranya: CIFS for Windows and Mac clients (Windows file sharing, backup and replication, and other Windows-based

applications). MAPI, including encrypted email (Microsoft Exchange v 5.5, 2000, 2003, and 2007). NFS v3 for Unix file sharing. TDS for Microsoft SQL Server. HTTP

HTTPS and SSL. IMAP-over-SSL. Oracle 9i, which comes with Oracle Applications 11i. Oracle10gR2, which comes with Oracle E-Business Suite R12.



Lotus Notes v6.0 and later.

Encrypted Lotus Notes.

ICA Client Drive Mapping. support for multistream and multiport ICA.

Referensi: Steelhead® Appliance Deployment Guide.Optimization Techniques and Design Fundamentals Chapter 1.Optimization Techniques and Design Fundamentals, halaman 9

8. What are the primary requirements that must be considered when sizing a Steelhead appliance for a

customer? (Select 4) A. Optimized WAN Throughput B. Connection count C. Datastore size D. Bypass port count E. Speed / duplex requirement

Answer: A, B, C, D

Penjelasan: All Steelhead appliance models have the following specifications that are used to determine the amount of traffic that a single Steelhead appliance can optimize:

Number of concurrent TCP connections WAN bandwidth rating RiOS data store size

Referensi: Steelhead® Appliance Deployment Guide. Chapter 1. Optimization Techniques and Design Fundamentals. Halaman 13

9. In which menu of the Steelhead Management Console do you configure WAN visibility modes?

A. In-path Rules B. Peering Rules C. Connection Forwarding D. Services E. Simplified Routing

Answer: A Penjelasan: WAN visibility disetting dari Configure>Optimization>In Path Rules

10. How many WAN visibility modes are available?

A. 1 B. 2 C. 3 D. 4 E. 5

Answer: C Penjelasan: WAN Visibility Mode ada 3 yaitu:

Correct Addressing - WAN- side connections use Steelhead appliance IP addresses and Steelhead appliance server ports. IP dan port yang digunakan adalah IP dan port dari Steelhead.

Port Transparency - WAN-side connections use Steelhead appliance IP addresses but use TCP server ports that mirror the LAN-side connection. IP yang digunakan tetap IP dari Steelhead tetapi port destination-nya dari sisi LAN.

Full Transparency - WAN-side connections mirror all IP addresses and TCP ports used on the LAN-side connection. IP dan port yang digunakan adalah dari sisi LAN.

11. What WAN traffic problems do Steelhead appliances overcome? (Select 3)

A. Number of connections per second B. Data deduplication C. Bandwidth D. Latency



E. TCP window size

F. Optimization

Answer: C, D, E Masalah bandwidth diatasi dengan Data Streamlining, sementara TCP window size dan latency dengan Transport Streamlining

12. Which trunking protocols are supported by the Steelhead appliance?

A. 802.1Q B. 802.1P C. 802.1AD D. Dynamic Etherchannel

Answer: A

Penjelasan: Yang didukung oleh Steelhead saat ini adalah Trunking 802.1Q

13. Which of the following platforms provide support for HighSpeed TCP?

A. All Steelhead modules designed for large offices

B. All models except the desktop units

C. All appliance models

D. Only the mid-size office

E. Only really big appliances 80lbs or greater

Answer: C

Penjelasan:

HSTCP dan juga MXTCP tersedia dan dapat dikonfigurasi pada semua model Steelhead appliance

14. A user uploads a Microsoft Word document to a server across the network using the file transfer

protocol (FTP). The file has been seen before by the Steelhead appliances that are optimizing the link

and so the user experiences warm performance. A second user at the same location downloads the file

from the same server using the CIFS protocol. This file transfer can be considered:

A. Cold, the data now travels in another direction so the Steelhead appliances need to relearn the data

B. Cold, the application protocol is now different so the Steelhead appliances need to relearn the data

C. Warm, the data has been seen by the Steelhead appliances before making the application protocol

irrelevant

D. Warm, only because the transfer uses CIFS

E. Partially warm, the Steelhead appliances only need to learn the new data

Answer: C

Penjelasan:

Dengan SDR, selama representasi biner dari file sama maka referensi dapat dikirim untuk data tersebut,

walaupun aplikasinya berbeda. Karena SDR tidak tergantung pada protokol aplikasi, port interface ataupun

peer

15. Which of the following deployment methods can NOT be used simultaneously on a single Steelhead

appliance?

A. Logical In-path/Physical In-path

B. Server-side out-of-path / Physical In-path

C. Server-side out-of-path / Logical In-path

D. All methods above can be configured on a single Steelhead appliance simultaneously

Answer: A

Penjelasan:

Logical In-path dan Physical In-path tidak bisa digunakan bersamaan pada satu perangkat Steelhead yang

sama.



Physical In-path menggunakan port in-path (LAN ke arah switch LAN dan WAN ke arah router gateway)

sekaligus. Sedangkan Logical In-path menggunakan port WAN saja. Jika Logical In-path diaktifkan pada satu

perangkat Steelhead, maka port LAN-nya akan secara otomatis dinonaktifkan (disable).

16. Which of the following parameters can be used to classify traffic into QoS classes? (Select 3)

A. Destination subnet

B. Source subnet

C. VLAN

D. WCCP Mask or HASH

E. Service Groups

Answer: A, B, C

Penjelasan:

The main components of the Riverbed QoS enforcement system are QoS classes and QoS rules. A QoS class

represents an aggregation of traffic that is all treated the same way by the QoS scheduler. QoS rules map

different types of network traffic to QoS classes. After you define a QoS class, you can create one or more

QoS rules to assign traffic to it. QoS rules can match traffic based on:

a source address, port, or subnet.

a destination address, port, or subnet.

the IP protocol in use: TCP, UDP, GRE, or all.

whether the traffic is optimized.

a VLAN tag.

a DSCP/IP TOS value.

payload.

Citrix application-specific bits in the payload. Citrix payloads can be examined for the application priority.

Referensi: Steelhead® Appliance Deployment Guide, Chapter 4 QoS Configuration and Integration, halaman 72 & 88

17. When configuring CIFS prepopulabon, which of the following parameters must be configured for

prepopulation to function? (Select 3)

A. Remote path

B. Username

C. CMC hostname

D. Password

E. RADIUS authentication

Answer: A, B. D

Penjelasan:

To configure CIFS prepopulation with the Management Console:

1. From the Management Console, choose Configure > Optimization > CIFS Prepopulation.

2. Select Enable Transparent Prepopulation Support.

3. Click Apply.

4. Select Add a New Prepopulation Share.

5. Specify the remote path where data is stored: for example, \\FileServerA\users.

6. Specify the account username. This is the login name that has a minimum of read access to the remote

path.

7. Specify your password and confirm your password.

8. Specify a date and time for the initial synchronization to take place.

9. Specify the synchronization interval. In the subsequent syncs, only new or modified data is sent across

the WAN.

10.Click Add.

The share information appears as registered and appears in the list of shares.

Referensi: Steelhead®Appliance Deployment Guide - Protocols, CIFS and HTTP Prepopulation, halaman 128

18. Assuming the Steelhead appliance has a 250 GB datastore capacity, by enabling PFS on a supported



Steelhead appliance which of the following would be true:

A. The datastore capacity will shrink due to the amount of space used by PFS

B. The datastore capacity will grow due to the amount of space added by PFS

C. Datastore capacity does not change

D. The datastore capacity will have to be reformatted

Answer: C

Penjelasan:

RSP is a virtualized area of the Steelhead where you can drop in different modules to run other services. On

all appliances the Data Store (SDR) has a dedicated partition and is unaffected by RSP and PFS.

Referensi: RCSA-W Prep Class Video Training & slide

19. Which of the following local accounts are available by default on a Steelhead appliance? (Select 2)

A. admin

B. riverbed

C. monitor

D. rvbd

E. root

Answer: A, C

Penjelasan:

Default account adalah admin (super user) dan monitor (hanya melihat settingan), perbedaannya:

Users with administrator (admin) privileges can configure and administer the Steelhead appliance.

Users with monitor (monitor) privileges can view the Steelhead appliance reports, user logs, and change

their own password. A monitor user cannot make configuration changes.

20. When enabling the IPSec feature on the Steelhead appliances:

A. Both optimized and pass-through traffic are encrypted

B. Only optimized traffic is encrypted

C. IPSec encrypted traffic is optimized

D. Only control traffic is encrypted, not user traffic

Answer: B

Penjelasan:

Steelhead bukan perangkat firewall, sehingga trafik yang dioptimasi saja yang dienkripsi dengan IPSec.

Trafik yang di passthrough tidak akan dienkripsi

21. Data Streamlining is used by the Steelhead appliances and Steelhead Mobile for what?

A. To speed up certain applicabons

B. To reduce the number of connections used

C. To reduce WAN utilization

D. To make UDP faster

Answer: C

Penjelasan:

Fungsi dari Data Streamlining salah satunya adalah mereduksi penggunaan bandwidth WAN dari 65-98%.

22. Steelhead appliances increase. (Select 2)

A. Application performance

B. Data transfer rate speed over the WAN

C. Data transfer speed over the LAN D. Quality of service

E. WORM stability



F. Prototyping

Answer: A, B

Penjelasan:

Dengan menggunakan Data Streamlining, Transport Streamlining, Application Streamlining dan

Management Streamlining, dapat meningkatkan performa aplikasi dan kecepatan transfer yang melewati

WAN.

23. In an in-path deployment, when a Steelhead appliance fails to wire, the Steelhead appliance acts as a:

A. Straight-through cable

B. Crossover cable

C. Router

D. Firewall

E. None of the above

Answer: B

Penjelasan:

All Steelhead appliance models and in-path network interface cards support fail-to-wire mode, where, in the

event of a failure or loss of power, the LAN and WAN ports become internally connected as if they

were the ends of a crossover cable, thereby providing uninterrupted transmission of data over the WAN.

The default failure mode is fail-to-wire mode.

Referensi: Steelhead® Appliance Deployment Guide. Fail-to-Wire and Fail-to-Block, halaman 19

24. A user downloads a Microsoft PowerPoint presentation from a server across the network. The file has

been seen before by both Steelhead appliances that are optimizing the link and so the user experiences

warm performance. A second user at the same office has a local copy and adds some pictures then

uploads the very same file. This file transfer can be considered:

A. Cold, the data now travels in another direction so the Steelhead appliance needs to relearn the data

B. Cold, the tile has been changed to the file needs to be stored again

C. Warm, all the data has been seen by the Steelhead appliances before

D. Warm, the transaction prediction module of the Steelhead appliance can detect the application and

accelerate the transfer

E. Partially warm, the Steelhead appliances only need to learn new data

Answer: E

Penjelasan:

Data Transfer Terminology

Warm Transfer adalah transfer suatu data yang sudah pernah ditransfer sebelumnya. Memanfaatkan

segmen yang telah tersimpan pada penyimpanan data kedua perangkat Steelhead yang terlibat

komunikasi. Cold Transfer adalah data yang belum pernah diterima sebelumnya oleh kedua perangkat Steelhead

yang berkomunikasi. Partial Warm Transfer adalah data yang hanya ada sebagian saja di kedua penyimpanan data

perangkat Steelhead. 25. When performing datastore synchronization between two Steelhead appliances , segments of data are

exchanged between them. Which interfaces can be used for datastore synchronization? (Select 2)

A. In-path

B. Primary

C. Auxiliary

D. WAN

E. Remote

Answer: B, C

Penjelasan:



Datastore Synchronization hanya menggunakan port Primary atau AUX saja.

26. Which forms of administrative authentication are supported by the Steelhead appIiances? (Select 3)

A. NTLM

B. TACACS+

C. RADIUS

D. Kerberos

E. Local username and password

Answer: B, C, E

Penjelasan:

Metode yang dapat digunakan pada Steelhead untuk autentikasi pengguna ke dalam sistem adalah:

Local

o Default account adalah admin (super user) dan monitor (hanya melihat settingan)

RADIUS

TACACS+ 27. The default action performed by the Steelhead appliance when it receives a packet with an existing

DSCP value 46 is to:

A. Override the value with a default of 0

B. Override the value with the value of AF11

C. Reflect the value received by the original packet

D. Reflect the value returned by the symmetric TCP flow

Answer: C

Penjelasan:

DSCP digunakan untuk menentukan bagaimana suatu paket diperlakukan sesuai QoS-nya. Nilai value 46

adalah EF (Expedited Forwarding) yang memiliki prioritas tertinggi. Jika Steelhead menerima paket dengan

marking seperti ini maka diteruskan ke WAN/gateway pun dengan marking yang sama (reflected). Seperti

gambar di bawah:

Default untuk QoS marking di Steelhead adalah "reflect".

28. When deploying a Steelhead appliance server-side out-of-path in the data center, what will be the

source IP address seen by the destination server in the data center?

A. The client PC’s IP address

B. The client-side Steelhead appliance’s Primary IP address

C. The client-side Steelhead appliance’s In-path IP address

D. The server-side Steelhead appliance's Primary IP address

Answer: D

Penjelasan:

Server-side OoP hanya menggunakan primary interface yang dihubungkan ke switch LAN. Di sisi lawannya



menggunakan fixed-target rule untuk menuju ke IP address primary interface Steelhead yang terdekat

dengan server. Seperti gambar berikut:

29. Application Streamlining supports which of the following protocols ¡n the Steelhead appliance?

A. HTTP, FTP, MAPI, NFS

B. MAPI, CIFS, NFSv4

C. CIFS, RDP, MAPI, HTTP, SSL, Oracle, MAC-CIFS, ICA, UDP

D. HTTP, MAPI, NFS v3, CIFS, Lotus Notes, MS-SQL

Answer: D

Penjelasan:

Lihat penjelasan soal no. 7

30. Can you manage your Virtual Steelhead appliance from a Central Management Console?

A. Yes, this is possible

B. Only on out-of-path deployments

C. Only on in-path deployments

D. There is a dedicated management device for Virtual Steelhead appliances

E. You can only manage your Virtual Steelhead appliances using a virtualized console

Answer: A

Penjelasan:

Virtual Steelhead dapat dimanage dengan Riverbed Central Management Console (CMC) v6.0.x.

Referensi: Virtual Steelhead Installation Guide, Version1.0 (RiOS v6.1.1), September 2010

31. Name the areas where the Steelhead appliance will be beneficial. (Select 3)

A. Accelerate chatty applications that use well known protocols such as CIFS and MAPI

B. Save bandwidth on LAN links

C. With a single TCP session, effectively use bandwidth on high-speed WAN links



D. Reduce UDP traffic on the WAN by engaging Riverbed Professional Services

E. Remove the traffic load from MAPI servers

Answer: A, C, D

Penjelasan:

Steelhead dapat mengurangi aplikasi "chatty" dengan Application Streamlining, mengefektifkan penggunaan

TCP dengan Transport Streamlining dan semua itu didukung oleh RSP (Riverbed Professional Services) dari

Riverbed.

32. A Steelhead appliance can synchronize its datastore with a maximum of how many other Steelhead

appliances?

A. 1

B. 2

C. 3

D. 4

Answer: A

Penjelasan:

Data store synchronization terjadi antara 2 perangkat Steelhead, ditanyakan "how many other" artinya ada

1 lagi selain master yang bertindak sebagai back up jika master-nya failed.

33. A Steelhead appliance can continue to optimize traffic in which of the following status states? (Select 2)

A. Healthy

B. Normal

C. Critical

D. Degraded

E. Failed

Answer: A, D

Penjelasan:

Status system Steelhead yaitu:

1. Healthy - The Steelhead is functioning and optimizing traffic.

2. Needs Attention - Accompanies a healthy state to indicate management-related issues not affecting

the ability of the Steelhead to optimize traffic.

3. Degraded - The Steelhead is optimizing traffic but the system has detected an issue.

4. Admission Control - The Steelhead is optimizing traffic but has reached its connection limit.

(additional connections will be pass-through)

5. Critical - The Steelhead may or may not be optimizing traffic; you need to address a critical issue. 34. Which of the following reflects the primary benefit of configuring CIFS prepopulation on a Steelhead

appliance?

A. Prelearning different CIFS dialects on the network

B. Prewarming the Datastore

C. CIFS management reporting

D. Management Streamlining

Answer: B

Penjelasan:

Prewarming RiOS data store selama off hour, membantu untuk mengurangi konsumsi bandwidth saat peak

hour

35. Which of the following management or monitoring methods are supported by the Steelhead appliance?

(Select 4)

A. SNMP / SNMP traps



B. Email notification

C. HP Open View Console plug-in available on Riverbed support site

D. Central Management Console

E. Syslog

Answer: A, B, D, E

36. What are the default port labels on the Steelhead appliance? (Select 3)

A. Secure

B. Interactive

C. RBT-Proto

D. Fixed-Target

E. Pass-Through

Answer: A, B, C

Penjelasan:

Port label default yang ada di Steelhead ada 3, yaitu:

Interactive, RBT-Proto, Secure

37. What does the Application Streamlining module in RIOS do?

A. Eliminates redundant bytes from transfers

B. Prioritizes application traffic

C. Eliminates transport protocol inefficiencies

D. Reduces WAN round trips at the application layer

E. All of the above

F. None of the above

Answer: D

Penjelasan: Application Streamlining mengurangi round trip melewati WAN untuk aplikasi layer 7 yang didukung oleh

Riverbed.

38. When upgrading a Steelhead appliance from the Management Console, the new image is always

installed on the:

A. Booted partition

B. Back up partition

C. Both the boot and backup partitions

D. The image is only installed into a partition after a reboot (from a temporary location)

E. Upgrades can only be done from the CLI

Answer: B

Penjelasan:

Software Upgrade diakses dari : Configure › Maintenance › Software Upgrade. Ada 2 versi yang terinstal di

Steelhead:

o Booted Version

o Backup Version

Upgrade moves booted version to backup

39. Datastore synchronization can be used in which of the following deployments?

A. Serial in-path

B. Logical in-path

C. Server-side out-of-path

D. Parallel in-path E. All of the above

Answer: E



Penjelasan:

Datastore sync dapat dilakukan di semua deployments Steelhead.

40. After deployment of Steelhead appliances, a certain backup application shows poor bandwidth

reduction. After disabling the backup applications native compression algorithm, the bandwidth

reduction statistics on the Steelhead appliances suddenly improve significantly. Which of the following

are likely causes for the increased bandwidth reduction?

A. The native compression algorithm of the backup application could not be compressed further

B. The application-level protocol used by the backup application is not recognized by the Steelhead

appliances

C. The Steelhead appliances were not able to effectively perform TCP optimizations

D. There should be no difference between compressed and uncompressed traffic

Answer: A

Penjelasan:

Jika suatu file sudah dikompresi maksimal, maka fitur kompresi di Steelhead akan dinonaktifkan.

41. Which of the following MAPI application-specific optimizations can be performed by Steelhead

appliances?

A. Read ahead on attachments

B. Read ahead on large emails

C. Write behind on attachments

D. Write behind on large emails

E. All of the above

Answer: E

Penjelasan:

MAPI optimization melakukan hal-hal berikut:

Read ahead on attachments

Read ahead on large emails

Write behind on attachments

Write behind on large emails 42. Data Streamlining brings what benefits?

A. WAN bandwidth reduction by 60-95%

B. Eliminates redundant data transfers at the byte-sequence level

C. Performs cross-application optimization

D. Provides compression

E. All of the above

Answer: E

Penjelasan:

Ada 4 komponen dalam Data Streamlining:

Data Reduction

Mengeliminasi data redundan pada WAN

Pemanfaatan bandwidth dengan reduksi hingga 60 – 95% Compression

Kompresi LZ-Compression untuk data segmen yang belum pernah dikirimkan sebelumnya

Berguna untuk data yang baru pertama kali dilewatkan QoS

(Optional) Mendahulukan data berdasarkan bandwidth dan latency Kompatibel dengan implementasi QoS existing.

Disaster Recovery Intelligence



Secara otomatis mengadaptasi algoritma untuk transfer DR skala besar Mengoptimalkan pembacaan, penulisan, dan penanganan segmen untuk beban besar

43. What factors should you use when measuring resources to help you size your Steelhead appliances?

(Select 3)

A. Number of connections per second

B. Average response time

C. Maximum number of optimize connections

D. Datastore capacity

E. Maximum number of TCP connections

F. WAN capacity

Answer: C, D, F

Penjelasan:

Sizing Considerations

Optimized Connection Limit – excess goes pass-through o Admission Control alarm

Optimized WAN Capacity – all OPTIMIZED traffic is SHAPED to the “Optimized WAN Capacity” Data Store Capacity – old data is evicted using LRU (default) or FIFO

44. Which version of WCCP supports redirection of all TCP traffic?

Version 1

Version 2

Version 9

Version 12.2.18

Answer: B

Penjelasan:

WCCP Version 2, which Steelhead appliances support, can redirect any type of connection from multiple

routers to multiple WCCP clients (also referred to as caches or engines)

Referensi: Steelhead® Appliance Deployment Guide. Chapter 8. AWCCP Virtual In-Path Deployments. Halaman 171

45. What is the datastore size?

A. The amount of disk space available for Scalable Data Referencing (SDR) use

B. The amount of disk space available for optimization use

C. The amount of memory available for optimization use

D. The amount of memory available for SDR use

E. The amount of CPU available for optimization use

Answer: A

Penjelasan:

Data store adalah ukuran untuk tempat potongan (chunk) dari SDR.

46. A major difference between MX.TCP and HighSpeed TCP is

A. MX-TCP backs off in the case of congestion, HighSpeed TCP does not

B. HighSpeed TCP backs off in the case off congestion, MX-TCP does not

C. MX-TCP can use TCP window scaling, HighSpeed TCP cannot

D. HighSpeed TCP can use TCP options, MX-TCP cannot

Answer: B

Penjelasan:

HS-TCP

High-Speed TCP menghindari slow start, namun tetap back off jika ada congestion.



Dipakai di semua trafik teroptimasi Fitur HS-TCP tersedia di semua model

MX-TCP

Menggunakan 100% dari bandwidth yang dialokasikan tanpa perlambatan karena

loss Granular control: Menjalankan per QoS class Membutuhkan QoS per class bandwidth limit untuk mengeset sending rate Fitur ini tersedia di semua model

47. What’s the default WAN visibility mode?

A. Correct Addressing

B. Port Transparency

C. Full Addressing

D. Full Transparency

E. Transparency

Answer: A

Penjelasan:

By default, Steelhead appliances use correct addressing.

Referensi: Steelhead® Appliance Deployment Guide. Chapter 3. WAN Visibility Modes. Halaman 46 48. Which of the following status states of the Steelhead appliance are valid? (Select 3)

A. Degraded

B. Normal

C. Healthy

D. Critical

E. Failed

Answer: A, C, D

Penjelasan:

Status system Steelhead yaitu: 1. Healthy - The Steelhead is functioning and optimizing traffic.

2. Needs Attention - Accompanies a healthy state to indicate management-related issues not affecting

the ability of the Steelhead to optimize traffic.

3. Degraded - The Steelhead is optimizing traffic but the system has detected an issue.

4. Admission Control - The Steelhead is optimizing traffic but has reached its connection limit.

(additional connections will be pass-through)

5. Critical - The Steelhead may or may not be optimizing traffic; you need to address a critical issue.

49. When MAPI prepopulabon is enabled, what is default TCP keep-alive time used to prepopulate the

Steelhead appliance with emails and attachments?

A. 24 hours

B. 48 hours

C. 72 hours

D. 96 hours

Answer: D

Penjelasan:

In MAPI-Prepopulation v1 (where just the IP address was tracked), the prepopulation session could have



remained until the connection timed out (default 96 hours).

Referensi: Steelhead® Appliance Deployment Guide - Protocols. Chapter 2. MAPI Optimization. Halaman 19

50. Which of the following database applications can the Steelhead appliance optimize with the Application

Streamlining module?

A. IBM DB2

B. Sybase

C. MySOL

D. Microsoft SQL

E. Great Plains

Answer: D

Penjelasan:

By default, Steelhead appliances optimize CIFS, MAPI, HTTP, Oracle Forms protocols, and MS-SQL for

Microsoft Project 2003.

Referensi: Steelhead® Appliance Deployment Guide - Protocols. Preface. Halaman 1

51. What action should be taken when the Steelhead appliance datastore is full?

A. Disconnect all users

B. Expand disk capacity

C. No action is required

D. Clean the datastore

E. Insert a USB key for extra storage

Answer: C

52. Assume the SSL server is configured for the defauft SSL port. Which port has to be specified in the in-

path rules of the client-side Steelhead appliance?

A. 443

B. 445

C. 7801

D. 8080

Answer: A

Penjelasan:

Port 443 harus dibuka agar dapat support HTTPS

53. What are valid datastore encryption types? (Select 4)

A. No encryption

B. AES_128

C. AES_64

D. AES_256

E. AES_192

Answer: A, B, D, E

Penjelasan:

Data is encrypted on the data store w/ AES 128, 192, 256-bit, or none=default

Referensi: RCSA-W Prep Class Video Training & slide

54. Some applications are designed to open many TOP connections to accomplish required data transfers.

Many of these connections are short-lived, yet each requires significant overhead to initiate

communications. What RiOS feature was designed to reduce the overhead of these short-lived TOP

connections?

A. HSTCP



B. MX-TCP

C. Virtual Window Expansion

D. Connection Pooling

E. Transport Streamlining

Answer: D

Semua peer SH akan memiliki connection pool sebanyak 20. Jumlah ini bisa dikonfigurasi pada tiap peer SH.

Tujuan connection pooling adalah menghindari TCP handshake antara perangkat Steelhead yang melewati

WAN . Dengan membangun sesi ini terlebih dulu, jika ada koneksi baru yang dibuat oleh client, client side

SH akan menggunakan koneksi yang ada di pool, dan koneksi baru akan dibuat lagi agar jumlah sesi tetap

20. Connection pooling hanya dapat diaplikasikan pada koneksi menggunakan Correct Addressing.

55. How can I obtain Virtual Steelhead appliance license keys?

A. Using the Riverbed public support site

B. Contacting VMware

C. Virtual Steelhead appliance license keys are included in the install package

D. Base licenses are not required

E. Only SSL licenses are not included

Answer: A

Penjelasan:

Cara mendapatkan license key untuk Virtual Steelhead bisa ke Riverbed Support site:

Once you have obtained the license request key, go to the Riverbed Licensing Portal at

https://licensing.riverbed.com (non-registered users) or to the Riverbed Support site at

http://support.riverbed.com/account/tokens/ (registered users) to generate your license keys. The license

keys include the VBASE license as well as any other licenses needed for the Virtual Steelhead model. The

Licensing Portal is a public website; the Riverbed Support website requires registration.

Referensi: Virtual Steelhead Installation Guide, Version1.0 (RiOS v6.1.1), September 2010, Chapter 2 Installing and Configuring the Virtual Steelhead, halaman 38

56. What are the benefits of Application Streamlining?

A. Applications run up to 100 times faster

B. Reduces application chattiness by 65-98%

C. Accelerates the most important applications, such as CIFS, MAPI, NFS, HTTP/S, LotusNotes, and MS-

SQL

D. All of the above


Answer: D

Penjelasan:

Sudah jelas, A, B, C merupakan keuntungan dari Application Streamlining Steelhead

57. When deploying a Steelhead appliance server-side out-of-path in the data center, which configuration is

necessary on the client-side Steelhead appliance in order for the design to function correctly?

A. An auto-discover rule with the IP address of the server-side Steelhead appliance

B. A fixed-target rule with the Primary IP address of the serve-side Steelhead appliance

C. A fixed-target rule with the IP address of the destination server

D. No configuration is required

Answer: B

Penjelasan:

Server-side OoP hanya menggunakan primary interface yang dihubungkan ke switch LAN. Di sisi lawannya

menggunakan fixed-target rule untuk menuju ke IP address primary interface Steelhead yang terdekat

dengan server. Seperti gambar berikut:

https://licensing.riverbed.com/

http://support.riverbed.com/account/tokens/



58. What combinations of WAN visibility modes can simultaneously be configured on Steelhead appliances?

A. It can never be done

B. Only Port Transparent

C. Only Correct Addressing

D. Only Full Addressing

E. Full Transparency, Port Transparency and Correct Addressing can be configured simultaneously

Answer: E

Penjelasan:

Mode transparansi yang berbeda bisa dikonfigurasi di Steelhead secara simultan, untuk mendukung

kebutuhan trafik user yang berbeda-beda.

59. What does the Data Streamlining module in RiOS do?

A. Eliminates redundant bytes from transfers


C. Reduces transport protocol inefficiencies

D. All of the above


Answer: A

Penjelasan:

Jawaban yang benar adalah A, termasuk komponen Data Reduction.

60. Which of the following QoS scheduling algorithms does Steelhead appliance use when QoS is enabled?

A. Weighted Random Early Discard

B. Weighted Fair Queuing

C. Hierarchical Fair Service Curve

D. Class Base Weighted Fair Queuing

Answer: C



Penjelasan:

Menggunakan HFSC. Data streamlining includes optional QoS enforcement. QoS enforcement allows

bandwidth and latency requirements to be decoupled through the implementation of Hierarchical Fair

Service Curve (HFSC) queuing technology.

61. What does the Transport Streamlining module in RiOS do? (Select 2)

A. Reduces transport protocol inefficiencies


C. Virtually expands TCP windows

D. Reduces WAN round trips at the application layer

Answer: A, C

Penjelasan:

Transport Streamlining bertanggung jawab terhadap metode transport dan layer transport di perangkat

Steelhead, yaitu mengurangi inefisiensi transport protocol dan memaksimalkan penggunaan TCP windows.

62. Which of the following is a benefit of the Riverbed Services Platform (RSP) on the Steelhead appliance?

(Select 2)

A. Optimizes VoIP flowing through proxy servers

B. Remove the need for specific servers in the branch offices

C. Allows for continued operations of specific functionality in the event of a WAN failure

D. Provides parallel forwarding domains for asymmetrical routing

Answer: B, C

Penjelasan:

Menggunakan Virtual Machine di dalam Vmware Server yang dibedakan dengan keperluan optimasi,

sehingga dapat menjalankan hingga 5 package (VM) tanpa perlu server khusus dan tidak mengganggu

proses optimasi trafik. Karena dipisahkan itu pula, jika WAN failure, tetap dapat beroperasi.

63. What are valid WAN visibility modes of the Steelhead appliance? (Select 3)

A. Correct Addressing

B. Port Transparency

C. Full Addressing

D. Full Transparency

E. Transparency

Answer: A, B, D

Penjelasan: WAN Visibility Mode ada 3 yaitu:

Correct Addressing - WAN- side connections use Steelhead appliance IP addresses and Steelhead appliance server ports. IP dan port yang digunakan adalah IP dan port dari Steelhead.

Port Transparency - WAN-side connections use Steelhead appliance IP addresses but use TCP server ports that mirror the LAN-side connection. IP yang digunakan tetap IP dari Steelhead tetapi port destination-nya dari sisi LAN.

Full Transparency - WAN-side connections mirror all IP addresses and TCP ports used on the LAN-side connection. IP dan port yang digunakan adalah dari sisi LAN.

64. What happens to “new” data that a Steelhead appliance has not seen before? (Select 2)

A. Drop the new data

B. Create a tunnel to optimize the data

C. Scalable Data Referencing creates and sends new references pointers to the peers Steelhead

appliance

D. Compress the data using Lempel-Ziv and sends it to the peer Steelhead appliance

E. Sends only the references for the data to the counterpart Steelhead appliance

Answer: C, D



Penjelasan:

Jika ada data baru yang belum pernah "dilihat" oleh Steelhead, maka yang akan dilakukan adalah SDR

membuat referensi baru untuk data tersebut lalu mengirimkan referensi tersebut ke peer-nya.

Jika ada data baru yang belum pernah "dilihat" oleh Steelhead (tidak ada kesamaan dengan file yang

sudah dikirimkan sebelumnya), semua data dan referensi akan dibuat, lalu data dan referensi tersebut

dikirimkan ke perangkat Steelhead yang berada di jaringan seberangnya. Data baru ini beserta referensi

yang menyertainya tetap dikompresi menggunakan algoritma Lempel-Ziv untuk meningkatkan performa,

meskipun pada transfer pertama. 65. In a single in-path design, in order for CIFS prepopulation to properly function at a branch office, the

Primary interface of the Steelhead appliance must be:

A. On the LAN side branch office Steelhead

B. Directly connected to the AUX interface

C. On the same switch as the WAN side interface

D. In the same subnet as the file server

Answer: A

Penjelasan:

You configure prepopulation only on the client-side Steelhead appliance. You must configure and connect

the client-side Steelhead appliance Primary interface properly for prepopulation to work. The Primary

interface must be able to establish connection with the server.

66. What do you configure to control optimization on a Steelhead appliance? (Select 2)

A. In-path rules

B. Optimization rules

C. Load balancing rules

D. Peering rules

E. TCP rules

F. Acceleration policies

Answer: A, D

Penjelasan:

Untuk mengontrol trafik yang di optimasi ada 2 cara yaitu In-path rules di sisi client, dan Peering rules di sisi

server

67. Which of the following factors are important to consider when sizing a Steelhead appliance? (Select 3)

A. Number of simultaneous optimized connections

B. The maximum optimized WAN bandwidth

C. The size of datastore

D. The number of applications used by the entreprise

Answer: A, B, C

Penjelasan:

Sizing Considerations

Optimized Connection Limit – excess goes pass-through o Admission Control alarm

Optimized WAN Capacity – all OPTIMIZED traffic is SHAPED to the “Optimized WAN Capacity” Data Store Capacity – old data is evicted using LRU (default) or FIFO

68. What is the default action of a Steelhead appliance when it enters admission control?

A. Fail-to-wire

B. Fail-to-block

C. Passthrough all connections

D. Passthrough new connections E. Drop new connections

Answer: D



Penjelasan:

Admission control means the Steelhead appliance has stopped trying to optimize new connections, due

to reaching its TCP connection limit, or due to some abnormal condition. Jadi setiap koneksi yang baru

dibuat saat admission control akan di passthrough tanpa optimasi.

69. When performing a logical in-path deployment, which interface needs to be physically cabled for

optimization to occur?

A. LAN

B. AUX

C. WAN

D. Primary

Answer: C

Penjelasan:

In a logical in-path deployment, the Steelhead appliance is logically in the path between clients and servers.

In a logical in-path deployment, clients and servers continue to see client and server IP addresses. This

deployment differs from a physical in-path deployment in that a packet redirection mechanism is used to

direct packets to Steelhead appliances that are not in the physical path of the client or server.

Commonly used technologies for redirection are: Layer-4 switches, Web Cache Communication Protocol

(WCCP), and Policy Based Routing (PBR).

Karena ada redirection ke Steelhead, maka koneksinya menggunakan WAN port.

70. How many In-path rules will a WAN-initiated single connection execute on a Steelhead appliance?

A. 0

B. 1

C. 2

D. 3

Answer: A

Penjelasan:

In-path rule adanya di sisi client, kalau dari sisi server menggunakan peering rule. Kalau dari sisi WAN

seharusnya peering rule.

71. With branch warming enabled, new data transferred between the Steelhead Mobile client and a server

will be populated into: (Select 3)

A. The Steelhead Mobile client datastore

B. The local office Steelhead appliance datastore

C. The server-side Steelhead appliance datastore

D. Datastore will not be populated

E. The Steelhead Mobile Controller datastore

Answer: A, B, C

Penjelasan:

Branch warming keeps track of data segments created while a Steelhead Mobile user is in a Steelhead

appliance-enabled branch office and sends the new data back to the Steelhead Mobile user’s laptop.

When the user goes back on the road, they receive warm performance.

Branch warming cooperates with and optimizes transfers for a server-side Steelhead appliance. New

data transfers between the client and server are populated in the Steelhead Mobile data

store, the branch Steelhead appliance data store, and the server-side Steelhead appliance

data store. Dari penjelasan diatas berarti dalam branch-warming, data yang baru ditransfer akan disimpan di Steelhead

mobile, Steelhead di local office dan Steelhead di sisi server. Branch warming selalu bekerja dengan fitur

Location Awareness.



72. The benefits provided by the CIFS application-level optimizations are:

A. Remove protocol chattiness from the remote LAN

B. Remove protocol chattiness from the data center LAN

C. Increase protocol chattiness from the WAN

D. Remove protocol chattiness from the WAN

E. Encrypt important data

Answer: D

Penjelasan:

Dengan CIFS application-level optim, didapatkan read ahead dan write behind, tidak terlalu banyak

memboroskan bandwidth di WAN

73. Which two parameters are required when configuring a fixed-target rule?

A. The target IP address and subnet mask of the target Steelhead appliance

B. The TCP option number for auto-discovery

C. The target Steelhead appliance and destination port number

D. The source IP address and source port number of the client traffic

Answer: C

Penjelasan:

Yang diperlukan dalam konfigurasi Fixed Target rule adalah IP address Steelhead target dan port tujuannya

74. What does the RiOS acronym stand for?

A. Riverbed interact Operations Shares

B. Riverbed Optimization System

C. Riverbed integrating Operating System

D. Riverbed is Orange Shamrocks

E. Riverbed is Outstanding Simple

Answer: B

Penjelasan:

Yang benar adalah Riverbed Optimization System

75. What is the default action of a Steelhead appliance when it hits the bandwidth limit?

A. Fail-to-wire

B. Inbound Optimized traffic is shaped to the specifications of the Steelhead apphance C. Passthrough all connections

D. Passthrough new connections



E. Outbond Optimized traffic is shaped to the spesifications of the Steelhead appliance

Answer: E

Penjelasan:

Jika bandwidth limit sudah tercapai, maka trafik yang dioptimasi akan disesuaikan dengan spesifikasi dari

perangkat Steelhead. Itulah mengapa bandwidth limit di perangkat Steelhead perlu diatur agar tidak terjadi

masalah.

76. A Steelhead appliance can be configured to automatically send an email to a preconfigured email

address in the event of a failure. Where is this done? (Select 3)

A. GUI

B. CLI

C. RADIUS/TACACS+

D. Can be done via the Central Management Console

E. DNS server

Answer: A, B, D

Penjelasan:

Settingan pengiriman email dapat dikonfigurasi dari GUI:

Configure > System Settings > Email

CLI

Syntax: [no] email mailhub <hostname or IP addr>

[no] email notify events enable

[no] email notify failures enable

[no] email notify events recipient <email addr>

[no] email notify failures recipient <email addr>

Dan via CMC.

77. What optimization can be performed on HTTPS traffic when SSL optimization is enabled?

A. SDR

B. LZ

C. Application Streamlining

D. A and B only

E. A, B, and C

Answer: E

Penjelasan:

HTTPS sudah disupport oleh Steelhead, sehingga tetap jalan optimasi SDR, LZ dan Aplikasi

soal rcsa-w volume a

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