October 2002
Intermediate to advanced
344 pages
10h 17m
English
Content preview from The ABCs of TCP/IP, 2nd Edition
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78 The ABCs of TCP/IP
Because it was previously determined that three bits from the host address
portion of the network would be required to function as a subnet identifier, the
network address is shown extended into the host byte by three portions.
Host Restrictions
In examining the subnets formed in Exhibit 19, it would appear that the hosts
on the first subnet can range from 0 through 31, while the hosts on the second
subnet can range in value from 33 through 63, etc. In actuality, this is not
correct because there are several restrictions concerning host addresses on
subnets. First, one cannot use a base subnet address of all zeroes nor all ones.
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