The all-time best-selling TCP/IP book, this is still the reference for anyone who wants to learn about or work with the TCP/IP protocol suite. Justly renowned for its clarity and accessibility,this superb text covers wide area Internet backbones as well as local area network technologies like FDDI and Ethernet. This is volume 1 of a 3 part set including Internetworking With TCP/IP (Vol. 2): Design, Implementation, and Internals and Internetworking With TCP/IP (Vol. 3): Client-Server Programming and Applications/BSD Socket Version
"Internetworking with TCP/IP" by Douglas E. Comer, is a must have for any Internet professional. I've always wanted to have this book, and now I finally bought it (using my training budget). :)
A detailed look at the transport of the Internet. As one who spent days configuring an NT server into a multihomed host using subnetting, a lot of the information is already known, but would be a good introduction for a technical minded person who can resist the urge to sleep. Starts out with obligatory origins of the net, thru dotted decimal notation, etc. Lots of good info on IP, routing, accessories like FTP and Telnet, and the section on IPng was very interesting. Would be a good textbook for a course.