What is the subnet mask for the IP address 172.16.5.10 if it is part of a /20 ne
Practice Questions
Q1
What is the subnet mask for the IP address 172.16.5.10 if it is part of a /20 network?
255.255.240.0
255.255.255.0
255.255.0.0
255.255.255.240
Questions & Step-by-Step Solutions
What is the subnet mask for the IP address 172.16.5.10 if it is part of a /20 network?
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: Recognize that the notation '/20' means that the first 20 bits of the subnet mask are set to '1'.
Step 3: Write down the binary representation of the subnet mask. The first 20 bits are '1's and the remaining 12 bits are '0's: 11111111.11111111.11110000.00000000.
Step 4: Convert the binary groups into decimal. The first group (11111111) is 255, the second group (11111111) is 255, the third group (11110000) is 240, and the last group (00000000) is 0.
Step 5: Combine the decimal values to get the subnet mask: 255.255.240.0.
Step 6: Confirm that this subnet mask allows for 4096 addresses in the subnet, which is calculated as 2^(32-20) = 2^12 = 4096.
