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Internet Protocol (IP)

Nov 23,2008 by alperen

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Internet Protocol (IP)

The Internet Protocol (IP) is another TCP/IP standard protocol. IP defines logical addressing and routing for the TCP/IP model.

The best analogy for how IP defines addressing and routing relates to the postal service. Before you put a letter in the mailbox, you put an address on the front. Likewise, before a computer can actually send a packet over the physical network, it must put an address in front of the packet. The address structure is defined by IP, as explained in RFC 791.

The need for IP and for IP addresses is not that obvious in the network with just Fred and Wilma. However, Figure 3-7 makes the need for addressing a little more obvious.

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