For more information on Apache, Jigsaw, and ident, check out:

Apache: The Definitive Guide

Ben Laurie and Peter Laurie, O'Reilly & Associates, Inc.

Professional Apache

Peter Wainwright, Wrox Press.

http://www.w3c.org/Jigsaw/

Jigsaw-W3C's Server W3C Consortium Web Site.

http://www.ietf.org/rfc/rfc1413.txt

RFC 1413, "Identification Protocol," by M. St. Johns.

 

Hypertext Transfer Protocol (HTTP)