4 IP Subnet Calculator

IP Subnet Calculator is a Web-based resource that is used to calculate the subnet mask based on several variables. This tool can be used to verify network settings.

http://www.cisco.com/cgi-bin/Support/IpSubnet/home.pl

161 - 238 CCNA 2: Routers and Routing Basics v3.1 Instructor Guide – Appendix A

Copyright 2004, Cisco Systems, Inc.

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Cisco Systems CCNA 2 manual IP Subnet Calculator