March 2009
Beginner to intermediate
144 pages
3h 13m
English
Content preview from Cisco Routers for the Desperate, 2nd Edition
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Appendix A. IP ADDRESSES AND NETMASKS
If you've been around the networking world for a while, you'll certainly recognize network blocks identified with slash notation, such as 10.0.0.0/8 or 209.69.8.0/23. If you know what these are, you can skip this appendix. Otherwise, read on.
What Is an IP Address?
An IP address is simply a 32-bit number assigned to particular network device. Rather than expressing that 32-bit number as a single number, IP addresses are usually shown broken up into four 8-bit numbers ranging from 0 to 255. It's much easier for our feeble brains to wrap around a number such as 192.168.0.1 than 11000000101010000000000000000001. ...
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