Pertemuan 6

1      1    1   1  1 1 1 1

128 64 32 16 8  4 2  1 = 255 byte

 2⁷    2⁶  2⁵  2⁴ 2³ 2²2¹2⁰

                                First byte

Class A	0	0-127
Class B	10	128-191
Class C	110	192-223
Class D	1110	224-239
Class E	1111	240-255

Total alamat host dalam sebuah network adalah 2^N-2 (N jumlah alamat bit)

	255	0	0	0
A	Network ID	Host	Host	Host	8
B	Network ID	Network ID	Host	Host	16
C	Network ID	Network ID	Network ID	Host	24
D	Network ID	Network ID	Network ID	Network ID

IP              = 192.168.2.254               Class C

Netmask = 255.255.255.0              AND

Alamat Host = 192.168.2.0

Netmask :

0              0 0 0 0 0 0 0 0

128         1 0 0 0 0 0 0 0

192         1 1 0 0 0 0 0 0

224         1 1 1 0 0 0 0 0

240         1 1 1 1 0 0 0 0

248         1 1 1 1 1 0 0 0

252         1 1 1 1 1 1 0 0

254         1 1 1 1 1 1 1 0

255         1 1 1 1 1 1 1 1

Alamat khusus : IP Private Address

Class A  : 10.0.0.0                              10.255.255.255 (1 network)

Class B  : 172.16.0.0                         172.31.255.255 (16 network)

Class C  : 192.168.0.0                       192.168.255.255 (256 network)

Kategori pengalamatan IP =

-          Classfull Addressing

-          Subnetted Classfull Addressing

Contoh :

110.24.48.0/24                   1 network

                9 network

100 Host               1             128         = 110.24.48.0/25

45 Host                 1             64           = 110.24.48.128/26

10 Host                 1             16           = 110.24.48.192/28

8 Host                   1             16           = 110.24.48.208/28

5 Host                   1             8              = 110.24.48.224/29

4 Host                   1             8              = 110.24.48.232/29

2 Host                   3             4              = 110.24.48.240/30

                Host = 2ⁿ-2                          = 110.24.48.244/30

VLSM (Variable Lenght Subnet Masking)

Conventional Subnetting