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Network Layer Protocols
It provides IP addressing, subnets, IP routing and packet filtering.
The IP layer packet
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IP Header |
Data Field (Transport protocol data) |
IPv4 Conventional Address classes
Four byte IP address example: 10000000.00000110.00000010.00000001 = 128.6.2.1
Class The First byte In decimal 4 byte Network/Host (n/h) Address
A 0....... 0-127 nnnnnnnn.hhhhhhhh.hhhhhhhh.hhhhhhhh
B 10...... 128-191 nnnnnnnn.nnnnnnnn.hhhhhhhh.hhhhhhhh
C 110..... 192-223 nnnnnnnn.nnnnnnnn.nnnnnnnn.hhhhhhhh
D 1110.... 224-239 (multicast)
E 11110... 240-247 (experimental)
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