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Appendix A
174
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Host ID: identifies a particular computer or device on the
network.
The first part of every IP address contains the network ID, and
the rest of the address contains the host ID. The length of the
network ID depends on the network's class (see following
section). Table 4 shows the structure of an IP address.
Table 4. IP Address structure
Here are some examples of valid IP addresses:
Class A: 10.30.6.125 (network = 10, host = 30.6.125)
Class B: 129.88.16.49 (network = 129.88, host = 16.49)
Class C: 192.60.201.11 (network = 192.60.201, host = 11)
Field 1 Field 2 Field 3 Field 4
Class A
Network ID Host ID
Class B
Network ID Host ID
Class C
Network ID Host ID