Avaya Configuring IP Services Manuel d'utilisateur Page 32

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Configuring IP Services
1-6 117356-A Rev. A
Table 1-1 shows the range of possible subnet masks for Class B and Class C
addresses, along with the number of bits that the mask allocates for a subnet
address, the number of recommended subnets associated with the mask, and the
number of hosts per subnet.
Table 1-1. Subnet Masks for Class B and Class C Addresses
Number of Bits Subnet Mask
Number of
Subnets
(Recommended)
Number of Hosts
per Subnet
Class B
2 255.255.192.0 2 16,382
3 255.255.224.0 6 8,190
4 255.255.240.0 14 4,094
5 255.255.248.0 30 2,046
6 255.255.252.0 62 1,022
7 255.255.254.0 126 510
8 255.255.255.0 254 254
9 255.255.255.128 510 126
10 255.255.255.192 1,022 62
11 255.255.255.224 2,046 30
12 255.255.255.240 4,094 14
13 255.255.255.248 8,190 6
14 255.255.255.252 16,382 2
Class C
2 255.255.255.192 2 62
3 255.255.255.224 6 30
4 255.255.255.240 14 14
5 255.255.255.248 30 6
6 255.255.255.252 62 2
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