06 jaringan komputer

PENGANTAR ILMU KOMPUTERKomunikasi Data dan Jaringan Komputer

04/13/23

Zulfadli Sulthan - PTIK - UNM 1

Sistem Komunikasi Data

Melibatkan minimal 2 simpul Simpul bisa berupa komputer maupun

peralatan lain Simpul berperan sebagai pengirim dan/atau

penerima data Dihubungkan oleh media transmisi Data yg ditransmisikan berupa isyarat

listrik

04/13/23Zulfadli Sulthan - PTIK - UNM

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Gangguan Komunikasi Data

Data yg sampai kepada penerima bisa tidak sama dg yg disampaikan pengirim

Penyebab Utama Atenuasi

Pelemahan sinyal akibat jarak Distorsi Tunda

Pengaruh pada waktu penerimaan Derau

Penambahan data yg tidak perlu pada saat transmisi data


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Arah Transmisi

Menyatakan arah isyarat dalam media transmisi Simplex / One way

Tidak dapat bertindak sebagai pengirim dan penerima sekaligus

Half-Duplex Mengirim dan menerima data bergantian

Full-Duplex Mengirim dan menerima data berbarengan


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Media Transmisi

Penghubung antara pengirim dan penerima u/ melewatkan data Media kabel Media nirkabel

Media Kabel Twisted Pair Cable

UTP STP

Coaxial Fiber Optic


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Jaringan Komputer

Hubungan dua atau lebih komputer yang bertujuan u/ melakukan pertukaran data

Memungkinkan berbagi sumberdaya Jenis jaringan menurut rentang geo

LAN Mencakup area yg terbatas (<1 Km)

MAN Mencakup area dg rentang satu kota (10-45

Km) WAN

Menghubungkan antar kota atau lebih luas lagi.04/13/23Zulfadli Sulthan - PTIK - UNM

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Topologi Jaringan

Susunan komputer secara fisik dalam suatu jaringan Bus Ring Star Extended Star Hierarchial Mesh


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Bus Topology

All of its nodes connected directly to one link No other connections between nodes Each host is wired to a common wire.

One advantage of this topology is that all hosts are connected to each other, and thus, can communicate directly.

One disadvantage of this topology is that a break in the cable disconnects hosts from each other.

Enables all networking devices to see all signals from all other devices Traffic problems and collisions are

common.

04/13/23 Zulfadli Sulthan - PTIK - UNM 8

Ring Topology

Single closed ring consisting of nodes and links. Each node connected to only two

adjacent nodes. All devices wired directly to each

other. In order for information to flow,

each station must pass the information to its adjacent station.


Star Topology

Has a central node with all links to other nodes radiating from it and allows no other links.

Its primary advantage is that it allows all other nodes to communicate with each other, conveniently.

Its primary disadvantage is that if the central node fails, the whole network becomes disconnected..

The flow of all information would go through one device.


Extended Star Topology

Repeats a star topology, except that each node that links to the center node is, also, the center of another star.

The advantage of this is that it keeps wiring runs shorter, and limits the number of devices that need to interconnect to any one central node.

An extended star topology is very hierarchical, and information is encouraged to stay local


Hierarchical Topology

Similar to the extended star topology uses a trunk node from which it,

then, branches to other nodes. The trunk is a wire that has

several layers of branches. The flow of information is

hierarchical.


Mesh Topology

Every node is linked directly to every other node.

The advantages are that Should any link fail to function, information

can flow through any number of other links to reach its destination.

Allows information to flow along many paths on its way through the network.

The primary physical disadvantage is the amount of media for the links, and the amount of connections to the links becomes overwhelming.

Depends greatly on the devices used.


Perangkat Interkoneksi Antarjaringan Interkoneksi Antarjaringan

Hubungan antara dua buah jaringan atau lebih.

Perangkatnya Repeater / Hub Bridge / Switch Router


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Thankyou


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06 jaringan komputer

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