What is the CIDR notation for a subnet mask of 255.255.255.224?
Practice Questions
Q1
What is the CIDR notation for a subnet mask of 255.255.255.224?
/24
/25
/26
/27
Questions & Step-by-Step Solutions
What is the CIDR notation for a subnet mask of 255.255.255.224?
Step 1: Understand what a subnet mask is. A subnet mask helps to divide an IP address into a network part and a host part.
Step 2: Convert the subnet mask 255.255.255.224 into binary. Each octet (number between dots) is converted separately: 255 is 11111111, 255 is 11111111, 255 is 11111111, and 224 is 11100000.
Step 3: Write the binary representation of the subnet mask together: 11111111.11111111.11111111.11100000.
Step 4: Count the number of '1's in the binary representation. There are 27 '1's.
Step 5: The CIDR notation is written as a slash followed by the number of '1's counted. So, it is /27.
