TCP/IP Illustrated was my bible when I worked at ICSA Labs.
TCP/IP Illustrated
W. Richard Stevens
TCP/IP Illustrated
5 readers recommend it across 5 discussions
Reader recommendations
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TCP/IP Illustrated, It was that first time I realized that all the magic the computer was doing could be understood on a bit by bit level. It launched me into a rewarding career.
1) The Art of Unix Programming 2) TCP/IP Illustrated 3) 97 Things Every Programmer Should Know
Also recommended in this reply
All the books by W. Richard Stevens[1], especially the TCP/IP Illustrated Volumes. No one covers theory with actual illustration and real world examples like Stevens does in his books. [1] http://en.wikipedia.org/wiki/W._Richard_Stevens