http://www.optimized.com/COMPENDI/index.html
http://www.optimized.com/COMPENDI/TabOfCon.htm
http://www.cisco.com/univercd/cc/td/doc/cisintwk/index.htm
http://www.comms.unsw.edu.au/info/faq/decrefguide/httoc.html

http://www.sangoma.com/tutorial.htm (Data Communications Tutorials)
http://www.protocols.com/protoc.shtml (Protocol Reference)
http://www.protocols.com/pbook/index.htm (Data Communications Encyclopedia)
http://www.sangoma.co.uk/hdlc.htm (HDLC tutorial)
http://www.sangoma.co.uk/synca.htm  (Synchronous and Asynchronous)
http://www.sangoma.co.uk/fguide.htm (TCP/IP and IPX Routing tutorial)
http://www.thomasregister.com/ (Vendor Listing)
http://www.techadvice.com/Links/L/L_LoopbackAddress.htm (Special IP address 127.0.0.1)
http://www.techadvice.com/tech/T/TCP-IP.htm#RPC (Excellent intro to TCP/IP)
http://www.faqs.org/rfcs/rfcsearch.html (Search RFC Tool)
http://www.faqs.org/rfcs/bcp/bcp5.html  (Private IP Addresses)
 

Private Network Numbers:
10.0.0.0     -   10.255.255.255  (10/8 prefix)
172.16.0.0   -   172.31.255.255  (172.16/12 prefix)
192.168.0.0  -   192.168.255.255 (192.168/16 prefix)

http://www.faqs.org/rfcs/std/std2.html  (IP Address 224.x.y.z is special, "M-bone" = Multicast IP)
http://www.comms.unsw.edu.au/info/faq/decrefguide/ch2-ip.html#E12E15  (Multicast IP)
 
 

INTERNET MULTICAST ADDRESSES

http://www.faqs.org/rfcs/std/std2.html
Host Extensions for IP Multicasting [RFC1112] specifies the
extensions required of a host implementation of the Internet Protocol
(IP) to support multicasting.  Current addresses are listed below.

224.0.0.0  Base Address (Reserved)                   [RFC1112,JBP]
224.0.0.1  All Systems on this Subnet                [RFC1112,JBP]
224.0.0.2  All Routers on this Subnet                        [JBP]
224.0.0.3  Unassigned