Daryl's TCP/IP Primer
   LAN Administrator's Guide to TCP/IP and routing for Internet-connected LANs.
   http://www.ipprimer.com/

Data Communications
   Presentation covering data communications concepts and technologies. Available both in HTML and Microsoft Power Point formats
   http://www.unm.edu/~network/presentations/course/chapters.html

High-Speed Networking Technology: An Introductory Survey
   Redbooks Technical Manuals from IBM. High-Speed Networking Technology: An Introductory Survey
   http://www.redbooks.ibm.com/abstracts/gg243816.html

How to find a host's geographical location ?
   How do I find the geographical location of a host, given its IP address ?
   http://www.private.org.il/IP2geo.html

Learning Practical TCP/IP for AIX V3.2/V4.1 Users
   Redbooks Technical Manuals from IBM. Learning Practical TCP/IP for AIX V3.2/V4.1 Users: Hints and Tips for Debugging and Tuning
   http://www.redbooks.ibm.com/abstracts/sg244381.html

TCP IP Users Guide
   Charles W. Lynn, Jr. Bolt Beranek and Newman, Inc. 50 Moulton Street Cambridge MA 02238 May 1982
   ftp://info.isi.edu/in-notes/tcp-ip.doc

TCP/IP Frequently Asked Questions: Introduction and Fundamental Protocols
   TCP/IP Frequently Asked Questions.
   http://www.itprc.com/tcpipfaq/

TCP/IP Tutorial and Technical Overview
   Redbooks Technical Manuals from IBM. TCP/IP Tutorial and Technical Overview
   http://www.redbooks.ibm.com/abstracts/gg243376.html

TCP/IP forum at Tek-Tips
   Technical support forums and mutual help system for computer professionals.
   http://www.tek-tips.com/threadminder.cfm?pid=581

TCP/IP introduction
   Yet another introduction to the TCP/IP Protocols
   http://www.ii.uib.no/~magnus/TCP.html

The Network Administrators' Guide
   This free electronic book in html format covers not only the TCP/IP protocols but also the configuration of most of the applications a network administrator must maintain
   http://www.dmsa.unipd.it/andreap/nag/nag.html

The Linux Network Administrators' Guide
   This manual, which is part of the Linux Documentation Project, contains a introduction to the TCP/IP protocols and covers various topics related to configuring networking services.
   http://www.tldp.org/LDP/nag/