TCP/IP Reference

TCP/IP Reference

This book assumes the basic familiarity with TCP/IP and networking concepts. You won ' t find a primer on the OSI Seven-layer model or a rundown of the Berkeley Socket API within these pages. For a comprehensive guide to TCP/IP, I recommend "TheTCP/IPGuide" by Charles Kozierok or the old class IC "TCP/IP illustrated, Volume I" by W. Richard Stevens.

While TCP/IP familiarity is expected, even the best of us occasionally forget bytes offsets for packet headers fields and FL Ags. This section provides quick reference diagrams and field descriptions for the IPv4, TCP, UDP, and ICMP protocols. These beautiful diagrams fromhttp://www.visi.com/~mjb/drawings is used by permission of author Matt Baxter.

Figure 1. IPV4 Header

650) this.width=650; "src=" Http://nmap.org/book/images/hdr/MJB-IP-Header-800x576.png "alt=" IPv4 Header "/>

Figure 2. TCP Header

650) this.width=650; "src=" Http://nmap.org/book/images/hdr/MJB-TCP-Header-800x564.png "alt=" TCP Header "/>

Figure 3. UDP Header

650) this.width=650; "src=" Http://nmap.org/book/images/hdr/MJB-UDP-Header-800x264.png "alt=" UDP Header "/>

Figure 4. ICMP Header

650) this.width=650; "src=" Http://nmap.org/book/images/hdr/MJB-ICMP-Header-800x392.png "alt=" ICMP Header "/>

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TCP/IP Reference