RFC 791 - Internet Protocol
- Request For Comments 791 documents the fundamental workings of IP.
- http://tools.ietf.org/html/rfc791

IP Self Test
- This 18-question online quiz tests your knowledge of the nuts and bolts of Internet Protocol.
- http://compnetworking.about.com/od/networkprotocolsip/l/aa081000a.htm

IPMI - IP Multicast Initiative
- Forum to accelerate adoption of the IP Multicast Initiative through education and marketing.
- http://www.ipmulticast.com

IPTV News.net
- Offers information and news on the evolving technologies of internet protocol television including hardware, software, and services.
- http://www.iptvnews.net/

Church of IP
- Includes FAQs, tips, discussion board, tools, and recommended books.
- http://www.churchofip.org/

Museum of Broken Packets
- Collection of broken, malformed, or peculiar packets found on the Internet, with theories as to how they came to be.
- http://lcamtuf.coredump.cx/mobp/

MyWanIP
- Free utility detects one's current IP address from behind a router.
- http://www.mywanip.com/

Connected - The IP Protocol
- Section 3 of "Connected: An Internet Encyclopedia" discusses datagrams and streams, subnetting, and the delivery model.
- http://www.freesoft.org/CIE/Course/Section3/

ipSwitchboard
- Site tracks the IP address of computers on the Internet, particularly Web and FTP servers.
- http://www.ipswitchboard.com/

Foundations of the Internet Protocol
- ACM Crossroads magazine article explains network protocol concepts, IP packets, and IP addressing.
- http://www.acm.org/crossroads/columns/connector/july2000.html

TDMoIP - TDM over IP
- Application of Time Division Multiplexing technology in transporting voice and data over high-performance IP networks.
- http://www.tdmoip.com/

What Is My IP Address?
- Free service automatically determines one's address on the Internet.
- http://www.whatismyipaddress.com/

IP Performance Metrics Charter
- IP Performance Metrics (IPPM) Working Group at IETF.
- http://www.ietf.org/html.charters/ippm-charter.html