how many usable IPs do you have left?

Your ISP has given you an IP block for your use. The block is 192.168.112.64/26.

If your network administrator uses the first usable IP for the router he’s installed on your network, how many usable IPs do you have left?

Your ISP has given you an IP block for your use. The block is 192.168.112.64/26.

If your network administrator uses the first usable IP for the router he’s installed on your network, how many usable IPs do you have left?

Answer: 61

Explanation:
CIDR notation /26 means you have 6 bits left as Host-IDs (32-26=6). The maximum number consisting of 6 Bits is 63 (00111111b) giving you 64 Hosts (including 0). You have to remove 2 IPs for Net-ID and Broadcast-ID and 1 for the Router. 64 – 3 = 61.



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