TCP/IP is a protocol that was originally implemented on Unix platforms but has now become the default network protocol on Microsoft Windows, Novell NetWare, and Apple Macintosh computing platforms. TCP/IP is routable and can be used for both local area networks and wide area networks. You should use TCP/IP if:

  • Your network is heterogeneous in character, consisting of different computing platforms and operating systems that all need to work together.

  • You need connectivity with the Internet or want to deploy Internet technologies within a corporate intranet environment.

  • You want to use the Active Directory component of WS2003. (Active Directory requires TCP/IP.)

A full treatment of TCP/IP is beyond the scope of this book. What follows here is a brief summary of its important features. For more information, see TCP/IP Network Administration by Craig Hunt (O’Reilly).

Some of the advanced features of TCP/IP in WS2003 include:

  • Support for APIPA, which allows client computers to be assigned IP addresses automatically without the need of a DHCP server. See Automatic Private IP Addressing (APIPA) later in this section for more information.

  • Support for dynamic recalculation of TCP window size and the ability to use large TCP windows to improve performance when large amounts of data are transmitted during a session. See Request For Comment (RFC) 1323 at for more information.

  • Support for selective TCP acknowledgments to reduce the time retransmitting ...

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