IPv4 Subnet Masks

What is the primary purpose of Classless Inter-Domain Routing (CIDR)?

• To assign IP addresses based on predefined classes (A, B, C).

• To remove restrictions created by classful subnet masks.

• To convert decimal subnet masks to binary.

• To identify the default gateway for a network.

How is a subnet mask structured in its binary representation?

• A series of zeros on the left followed by ones on the right.

• A random mix of ones and zeros.

• A contiguous series of ones on the left followed by zeros on the right.

• A series of ones and zeros that alternate.

What is the CIDR notation for the binary subnet mask 11111111.11111111.11100000.00000000?

• /16

• /19

• /24

• /27

What is the decimal representation of a /26 CIDR subnet mask?

• 255.255.255.0

• 255.255.255.128

• 255.255.255.192

• 255.255.255.224