A subnet mask of 255.255.255.192 is equivalent to which CIDR notation?

A subnet mask of 255.255.255.192 corresponds to CIDR notation of /26. This is determined by counting the number of bits set to '1' in the subnet mask. The subnet mask 255.255.255.192 in binary is represented as:

• 255: 11111111

• 255: 11111111

• 255: 11111111

• 192: 11000000

When combined, this gives us the full binary representation of the subnet mask as follows:

11111111.11111111.11111111.11000000

In this binary form, there are 26 bits set to '1'. Hence, the equivalent CIDR notation is /26, which indicates that the first 26 bits of the address are used for the network portion, while the remaining bits are designated for host addresses within the subnet.

Understanding CIDR notation is important because it provides a concise way to specify the subnet mask and allows for easier calculations regarding the number of available hosts within a network. In this case, with a /26 designation, there are 64 IP addresses in total within that subnet, allowing for 62 usable host addresses after accounting for the network and