TAC Notice: What's Changing on TAC Web

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Host/Subnet Quantities Table

Class B Effective Effective # bits Mask Subnets Hosts ------- --------------- --------- --------- 2 255.255.192.0 2 16382 3 255.255.224.0 6 8190 4 255.255.240.0 14 4094 5 255.255.248.0 30 2046 6 255.255.252.0 62 1022 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 1022 62 11 255.255.255.224 2046 30 12 255.255.255.240 4094 14 13 255.255.255.248 8190 6 14 255.255.255.252 16382 2

Class C Effective Effective # bits Mask Subnets Hosts ------- --------------- --------- --------- 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

Class A Effective Effective # bits Mask Subnets Hosts ------- --------------- --------- --------- 2 255.192.0.0 2 4194302 3 255.224.0.0 6 2097150 4 255.240.0.0 14 1048574 5 255.248.0.0 30 524286 6 255.252.0.0 62 262142 7 255.254.0.0 126 131070 8 255.255.0.0 254 65534 9 255.255.128.0 510 32766 10 255.255.192.0 1022 16382 11 255.255.224.0 2046 8190 12 255.255.240.0 4094 4094 13 255.255.248.0 8190 2046 14 255.255.252.0 16382 1022 15 255.255.254.0 32766 510 16 255.255.255.0 65534 254 17 255.255.255.128 131070 126 18 255.255.255.192 262142 62 19 255.255.255.224 524286 30 20 255.255.255.240 1048574 14 21 255.255.255.248 2097150 6 22 255.255.255.252 4194302 2 *Subnet all zeroes and all ones excluded. *Host all zeroes and all ones excluded.

Host/Subnet Quantities Table

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