If you want to know more
Cisco courses (ICRC,ACRC)
Cisco documentation (www.cisco.com)
Cisco mailing list
cisco-reguest@spot.colorado.edu
search engine
http://www.nexial.com/cgi-bin/ciscobody
Books:
- Managing IP Networks with Cisco Routers, Scott Bellew, O’Reilly and Associates
- TCP/IP Illustrated, Volume 1: The protocols, W. Richard Stevens, Addison-Wesley