Figure 30 Subnet Mask: Class A - Nortel DMS-100 User Manual

Figure 30 Subnet mask: class A

No. subnets No. hosts
2 4194302
6 2097150
14 1048574
30 524286
62 262142
126 131070
254 65534
510 32766
1022 16382
2046 8190
4094 4094
8190 2046
16382 1022
32766 510
65534 254
131070 126
262142
524286
1048574
2097150
4194302
Note: The CORWAN (Nortel LAN network 47.XX.XX.XX) is a class A network with a 12 bit subnet.
CLASS A subnet masks
netmask
255.192.0.0
255.224.0.0
255.240.0.0
255.248.0.0
255.252.0.0
255.254.0.0
255.255.0.0
255.255.128.0
255.255.192.0
255.255.224.0
255.255.240.0
255.255.248.0
255.255.252.0
255.255.254.0
255.255.255.0
255.255.255.128 (11111111.11111111.11111111.10000000)
62 255.255.255.192 (11111111.11111111.11111111.11000000)
30 255.255.255.224 (11111111.11111111.11111111.11100000)
14 255.255.255.240 (11111111.11111111.11111111.11110000)
6 255.255.255.248 (11111111.11111111.11111111.11111000)
2 255.255.255.252 (11111111.11111111.11111111.11111100)
Host/Router
Appendix E: Understanding IP and IP addressing 153
Netmask in binary format
(11111111.11000000.00000000.00000000)
(11111111.11100000.00000000.00000000)
(11111111.11110000.00000000.00000000)
(11111111.11111000.00000000.00000000)
(11111111.11111100.00000000.00000000)
(11111111.11111110.00000000.00000000)
(11111111.11111111.00000000.00000000)
(11111111.11111111.10000000.00000000)
(11111111.11111111.11000000.00000000)
(11111111.11111111.11100000.00000000)
(11111111.11111111.11110000.00000000)
(11111111.11111111.11111000.00000000)
(11111111.11111111.11111100.00000000)
(11111111.11111111.11111110.00000000)
(11111111.11111111.11111111.00000000)
DMS-100 Family EIU User Guide TELECOM12
Base_Tel-10
IPNETWRK
subnet size
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DMS