Announcing the 559 pages "TCP/IP Fundamentals for Microsoft Windows" eBook in PDF format and a completely free download rich in information.

This online book is a structured, introductory approach to the basic concepts and principles of the Transmission Control Protocol/Internet Protocol (TCP/IP) protocol suite, how the most important protocols function, and their basic configuration in the Microsoft Windows Vista, Windows Server 2008, Windows XP, and Windows Server 2003 families of operating systems. 

There’s nothing ‘fundamental’ about this book; there’s lots of very in-depth information on the new networking stack capabilities in Vista/WS08 and a great resource to have available.

Related link:  http://www.microsoft.com/downloads/details.aspx?FamilyID=c76296fd-61c9-4079-a0bb-582bca4a846f&DisplayLang=en