A subnet mask of 255.255.255.248 is equivalent to which CIDR notation?

A subnet mask of 255.255.255.248 is equivalent to which CIDR notation?

• A. /27
• B. /28
• C. /29
• D. /30

Answer: (C)

The subnet mask of 255.255.255.248 is expressed in CIDR notation by counting the number of bits set to '1' in the mask. In binary, the subnet mask 255.255.255.248 converts to: - 255 -> 11111111 - 255 -> 11111111 - 255 -> 11111111 - 248 -> 11111000 When you look at this binary representation, there are 29 bits set to '1'. This means that the CIDR notation corresponding to the subnet mask of 255.255.255.248 is /29. In CIDR notation, the number following the slash indicates how many bits of the subnet mask are used for the network portion, which, in this case, is 29. Understanding this conversion is essential for subnetting, as CIDR notation is commonly used in routing tables and networking configuration to simplify the representation of IP addresses and their associated network masks.

The subnet mask of 255.255.255.248 is expressed in CIDR notation by counting the number of bits set to '1' in the mask. In binary, the subnet mask 255.255.255.248 converts to:

• 255 -> 11111111

• 255 -> 11111111

• 255 -> 11111111

• 248 -> 11111000

When you look at this binary representation, there are 29 bits set to '1'. This means that the CIDR notation corresponding to the subnet mask of 255.255.255.248 is /29.

In CIDR notation, the number following the slash indicates how many bits of the subnet mask are used for the network portion, which, in this case, is 29. Understanding this conversion is essential for subnetting, as CIDR notation is commonly used in routing tables and networking configuration to simplify the representation of IP addresses and their associated network masks.