The ever-improving tools available to network engineers have helped hide the details of the TCP/IP protocol suite to some degree, but real gurus know that you have to understand the protocols at a low level to really see what's going on. TCP/IP: Architecture, Protocols, and Implementation with IPv6 and IP Security shows how, under the TCP/IP protocols, digital signals are assembled into packets and routed among network nodes.
To communicate this information, the author uses lots of block diagrams and bit listings. He also patiently walks through transactions, explaining how nodes communicate back and forth to establish connections. The miscellaneous elements of the TCP/IP stack--including Bootstrap Protocol (BOOTP), Dynamic Host Configuration Protocol (DHCP), the Domain Name System (DNS), the mail protocols, and various others--get plenty of attention too (something that's welcome, as they're not well covered in most TCP/IP books).
This second edition includes bits of information on both IP version 6 (IPv6) and IP Secure (IPsec), but neither is discussed in much depth. If you want to read more about IPv6, check out IPv6: The Next Generation Internet Protocol. If security (perhaps for a virtual private network) interests you, IPsec has all the detail you could want about the IPsec improvements to the Internet protocol stack. --David Wall

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Called "the leader in the Snort IDS book arms race" by Richard Bejtlich, top Amazon reviewer, this brand-new edition of the best-selling Snort book covers all the latest features of a major upgrade to the product and includes a bonus DVD with Snort 2.1 and other utilities. Written by the same lead engineers of the Snort Development team, this will be the first book available on the major upgrade from Snort 2 to Snort 2.1 (in this community, major upgrades are noted by .x and not by full number upgrades as in 2.0 to 3.0). You will be given invaluable insight into the code base of Snort, and in depth tutorials of complex installation, configuration, and troubleshooting scenarios. Snort has three primary uses: as a straight packet sniffer, a packet logger, or as a full-blown network intrusion detection system. It can perform protocol analysis, content searching/matching and can be used to detect a variety of attacks and probes. Snort uses a flexible rules language to describe traffic that it should collect or pass, a detection engine that utilizes a modular plug-in architecture, and a real-time alerting capability. A CD containing the latest version of Snort as well as other up-to-date Open Source security utilities will accompany the book.

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Get ready to master the basics and beyond with this in-depth guide to Linux. You’ll discover how Linux is productive enough to use as your only desktop system and powerful enough to run entire corporate enterprise installations. Plus, you’ll walk through 16 different Linux distributions, find step-by-step instructions, be introduced to new programming tools, and tap into the world of free software, all aimed at helping you succeed with Linux.

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