December 2001
Intermediate to advanced
656 pages
27h 19m
English
Content preview from Networking Explained, 2nd Edition
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Chapter 3: The Internet and TCP/IP 123
address can be subnetted into 256 autonomous subnets with each subnet supporting 256
host IDs by using 8 higher-order bits of the host ID as part of the network ID. By doing so,
the network ID will consist of 24 bits, the host ID will consist of 8 bits, and the corre-
sponding subnet mask will be 255.255.255.0. Hence, this scheme effectively subnets a
Class B address into 256 Class C equivalent addresses. Once again, note how much more
efficient this is than maintaining a single (flat) address space with 65,536 nodes.
83. Is it possible to subnet a subnet?
Yes it is. Subnetted networks themselves can also be subnetted. ...
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