Introduction to Unix Network Programming by University of Illinois
This PDF covers the following topics related to UNIX Network Programming : Internet Protocols, Direction and Principles, Network Programming, Client-Server Model, Server-side service models, Stream sockets, Datagram sockets, Socket Address Structure, TCP and UDP Ports, etc.
Author(s): University of Illinois
90 Pages 
The FreeBSD Corporate Networkers Guide
We are working on the detailed description of this book, we will update this section soon.
Author(s):
Pages
Beej's Guide to Unix Network Programming
We are working on the detailed description of this book, we will update this section soon.
Author(s):
Pages
