January 2004
Intermediate to advanced
536 pages
13h 2m
English
Content preview from IPv6, 2nd Edition
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46 Part One • Theory
Mask # of Class C # of Host
Networks Addresses
/20 16 4094
/19 32 8190
/18 64 16,382
/17 128 32,766
/16 256 65,534
/15 512 131,070
/14 1024 262,142
Table 3–1: As a CIDR allocation mask decreases in size, the
number of /24 networks (equivalent to a Class C network)
and number of host addresses available increase.
Another result of the deprecation of network classes is that Class A network
space (such as 24.0.0.0, as noted earlier) can be allocated in much smaller
chunks. For example, the network address 10.4.37.0 /24 may appear to be
a subnet of a Class A network, but it actually refers to the equivalent of a
Class C network using the newer ...
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