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CHAPTER
30-1
Cisco Router and Security Device Manager Version 2.2 Users Guide
OL-4015-08
30
More About....
These topics provide more information about subjects that SDM online help
discusses.
IP Addresses and Subnet Masks
This topic provides background information about IP addresses and subnet masks,
and shows you how to use this information when entering addresses and masks in
SDM.
IP version 4 addresses are 32 bits, or 4 bytes, in length. This address "space" is
used to designate the following:
Network number
Optional subnetwork number
A host number
Note SDM does not support IP version 6.
SDM requires you to enter IP addresses in dotted-decimal format. This format
makes addresses easier for people to read and manipulate, by grouping the 32 bits
into 4 octets which are displayed in decimal, separated by periods or "dots," for
example, 172.16.122.204. The decimal address 172.16.122.204 represents the
binary IP address shown in the following figure.
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