TCP/IP Illustrated: The Protocols, Volume 1 (Addison-Wesley Professional Computing Series) cover
TCP/IP Illustrated: The Protocols, Volume 1 (Addison-Wesley Professional Computing Series)
by Kevin R. Fall, W. Richard Stevens
ISBN: 0321336313
Buy on Amazon
Found in 1 comment on Hacker News
skunkworks · 2011-12-31 · Original thread
Link to the 2nd Edition version of this book:

http://www.amazon.com/TCP-Illustrated-Protocols-Addison-Wesl...

(Didn't even realize it had been updated until I checked!)