Darryl has been given the 10.20.30.64/26 network to use for a set of virtual machines that he is provisioning on his company's private cloud. He has been told to configure the last usable IP address in the range as the gateway, or router, address. Which of the following IP addresses should he use for the gateway?
A) 10.20.30.127
B) 10.20.30.126
C) 10.20.30.254
D) 10.20.30.94

Question

Quizplus · Accepted Answer

A /26 subnet mask means that 26 bits are used for the network portion, leaving 6 bits for host addresses. This allows for 64 addresses (2^6), but the first address is the network address and the last is the broadcast address, leaving 62 usable addresses. For the network 10.20.30.64/26, the range is 10.20.30.64 to 10.20.30.127. Therefore, the last usable IP address is 10.20.30.126.

Darryl Has Been Given the 10