By Jon C. Snader
An outstanding next-step for college students who've learn Stevens' TCP/IP Illustrated sequence, this e-book is designed to spice up programmers to a better point of competence via targeting the protocol suite's extra refined gains and strategies. In forty-four concise, self-contained classes, this booklet bargains experience-based advice, practices, and ideas of thumb for studying high-performance TCP/IP programming options. furthermore, it exhibits you the way to prevent a lot of TCP/IP's commonest difficulty spots. a variety of examples display crucial rules and ideas. Skeleton code and a library of universal capabilities let you write functions with no need to fret approximately regimen chores.
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Additional info for Effective TCP IP Programming: 44 Tips to Improve Your Network Programs
Sample text
There are 224 or 16,777,216 possible host IDs, but host 0 and the host ID of all ones have special meaning. The host ID of all ones is the broadcast address. I>P da tagrams addressed to the broadcast address are delivered to all hosts on the network. The host ID of 0 means ‘‘this host’’ and is used only as a source address by a host to discover its host number during start-up. For this reason, the number of hosts is always 2n − 2, where n is the number of bits in the host ID. Because the network ID is 7 bits, there are 128 possible class A networks.
The second feature that UD>P addsto I>P is the notion of po rts. 3 TC>P send window I>P addresses (the addr esses that are usually given in the Internet standard dotted decimal notation, see Tip 2) are used to deliver an I>P datagram ot a particular host. When the datagram arrives at the destination host, it still needs to have its data delivered to the correct application. For example, one UD>P packet may eb destined for the echo service, whereas another may be destined for the time-of-day service.
Typically this means that the client and server do not carry on an extended dialog—the client makes a request and the server sends a reply. If the client later sends another request, the protocol considers it a separate transaction, independent from the first. It also means that the protocol is probably unreliable. That is, the network makes a best effort attempt to deliver each datagram, but there is no guarantee that it will not be lost, delayed, or delivered out of sequence. Connection-oriented protocols, on the other hand, do maintain state between packets, and applications using them typically engage in extended dialogs.