Need to Know More?

Shannon, Michael. CCNP Routing Exam Cram 2 . Que, 2003. ISBN: 0789730170

Stevens, W. Richard. The Protocols (TCP/IP Illustrated, Volume 1) . Adison-Wesley Publishing Co., 1994, ISBN: 0201633469

Library Noi Net, Introduction Into Internetworking and TCP/IP, http://library.n0i.net/networking/protocols/ro-routing-refg/ch1-intr.html

Cisco CCO Web site, IP Routing Frequently Asked Questions, http://www.cisco.com/en/US/customer/tech/tk365/tk80/technologies_q_and_a_item09186a008012d8f7.shtml