Classfull Adressing

Class A

Class B

Class C

Class D

Class E

2^31 = 2 Billion addresses

2^30 = 1 Billion addresses

2^29 = 536 Million addresses

2^28 = 268 Million addresses

0

1 0

1 1 0

1 1 1 0

1 1 1 1

2^28 = 268 Million addresses

Net ID

Host ID

7 bits

24 bits

Net ID

Host ID

14 bits

16 bits

21 bits

8 bits

Net ID

Host ID

0 -127

128 -191

192 -223

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