addressing dan subnetting on ipv4 with class c

Addressing dan SubnettingIr. S.N.M.P. Simamora, MT.

Laboratorium JaringanJurusan Ilmu Komputer

F-MIPABandung 2006

Referensi:

1) Shinde, S. 2006. Computer Network. New Age International Ld, Pubsh.

2) Simamora, S.N.M.P. 2003. JaringanKomputer. Departemen SistemKomputer, Fak.Teknik, ITHB. Bandung

IP Address

• Terletak pada lapisan ke-2 TCP/IP• Bertindak sebagai identifikasi pada jaringan

komputer saat komunikasi data berlangsung• Terdiri dari 4 class:

– Class A: 255.0.0.0– Class B: 255.255.0.0– Class C: 255.255.255.0– Class D: untuk multi-casting– Class E: untuk keperluan khusus

• Saat ini menggunakan v4, dikembangkan v6 dengan alasan keterbatasan ‘stock’ nomor IP.

Subnet IP Address

• Misalkan:185.212.23.23/16Artinya: IP Address tersebut berada padasubnet-mask: 255.255.0.0255.255.0.0 = 11111111.11111111.0.0 16bit

• Misalkan:110.165.25.47/8Artinya: IP Address tersebut berada padasubnet-mask: 255.0.0.0255.0.0.0 = 11111111.0.0.0 8 bit

Subnetting IPv4

Konsep ini disebut Classless Inter-Domain Routing(CIDR)

Point-to-Point IPv4: Class A

125.162.24.30255.0.0.0

125.163.24.30255.0.0.0

Point-to-Point IPv4: Class B

190.162.24.30255.255.0.0

190.162.30.24255.255.0.0

Point-to-Point IPv4: Class C

196.162.24.20255.255.255.0

196.162.24.30255.255.255.0

Range Class IP Address

• Class A: 1 – 126• Class B: 128 – 191• Class C: 192 – 223

Hal utama dalam keterkaitanSubnetting IP Address

• Jumlah subnet• Jumlah host per subnet• Blok subnet• Alamat host dan broadcast valid

Subnetting IPv4 Available

255.128.0.0

11111111 10000000 00000000 00000000

9 bit, dituliskan: 255.128.0.0/9

Subnetting IPv4 Available

255.192.0.0

11111111 11000000 00000000 00000000

10 bit, dituliskan: 255.192.0.0/10

Subnetting IPv4 Available

255.224.0.0

11111111 11100000 00000000 00000000

11 bit, dituliskan: 255.224.0.0/11

Subnetting IPv4 Available

255.240.0.0

11111111 11110000 00000000 00000000

12 bit, dituliskan: 255.240.0.0/12

Subnetting IPv4 Available

255.240.0.0

11111111 11110000 00000000 00000000

12 bit, dituliskan: 255.240.0.0/12

Subnetting IPv4 Available

255.248.0.0

11111111 11111000 00000000 00000000

13 bit, dituliskan: 255.248.0.0/13

Subnetting IPv4 Available

255.252.0.0

11111111 11111100 00000000 00000000

14 bit, dituliskan: 255.252.0.0/14

Subnetting IPv4 Available

255.254.0.0

11111111 11111110 00000000 00000000

15 bit, dituliskan: 255.254.0.0/15

Subnetting IPv4 Available

255.255.0.0

11111111 11111111 00000000 00000000

16 bit, dituliskan: 255.255.0.0/16

Subnetting IPv4 Available

255.255.128.0

11111111 11111111 10000000 00000000

17 bit, dituliskan: 255.255.128.0/17

Subnetting IPv4 Available

255.255.192.0

11111111 11111111 11000000 00000000

18 bit, dituliskan: 255.255.192.0/18

Subnetting IPv4 Available

255.255.224.0

11111111 11111111 11100000 00000000

19 bit, dituliskan: 255.255.224.0/19

Subnetting IPv4 Available

255.255.240.0

11111111 11111111 11110000 00000000

20 bit, dituliskan: 255.255.240.0/20

Subnetting IPv4 Available

255.255.248.0

11111111 11111111 11111000 00000000

21 bit, dituliskan: 255.255.248.0/21

Subnetting IPv4 Available

255.255.252.0

11111111 11111111 11111100 00000000

22 bit, dituliskan: 255.255.252.0/22

Subnetting IPv4 Available

255.255.254.0

11111111 11111111 11111110 00000000

23 bit, dituliskan: 255.255.254.0/23

Subnetting IPv4 Available

255.255.255.0

11111111 11111111 11111111 00000000

24 bit, dituliskan: 255.255.255.0/24

Subnetting IPv4 Available

255.255.255.128

11111111 11111111 11111111 10000000

25 bit, dituliskan: 255.255.255.128/25

Subnetting IPv4 Available

255.255.255.192

11111111 11111111 11111111 11000000

26 bit, dituliskan: 255.255.255.192/26

Subnetting IPv4 Available

255.255.255.224

11111111 11111111 11111111 11100000

27 bit, dituliskan: 255.255.255.224/27

Subnetting IPv4 Available

255.255.255.240

11111111 11111111 11111111 11110000

28 bit, dituliskan: 255.255.255.240/28

Subnetting IPv4 Available

255.255.255.248

11111111 11111111 11111111 11111000

29 bit, dituliskan: 255.255.255.248/29

Subnetting IPv4 Available

255.255.255.252

11111111 11111111 11111111 11111100

30 bit, dituliskan: 255.255.255.252/30

Kasus: Lakukan perencanaan subnetting 198.20.15.20/27

255.255.255.224

11111111 11111111 11111111 11100000

a) Jumlah subnet: 2x ; x = 3 bit23 = 8 subnet

27 bit = 8 bit + 8 bit + 8 bit + 3 bit

Kasus: Lakukan perencanaan subnetting 198.20.15.20/20

b) Jumlah host per subnet: 2y - 2 ; y = 8-3= 5 bit25 – 2 = 30 host

c) Blok subnet: 256 - z ; z = desimal subnet tersisa ; z = 128+64+32 = 224256 – 224 = 32

255.255.255.224

Blok subnet: 0,32,64,96,128,160,192,224

Kasus: Lakukan perencanaan subnetting 198.20.15.20/20

d) IP Address host dan broadcast yang valid, disajikan berikut: