What is the subnet address for 10.57.126.156/29?

What is the subnet address for 10.57.126.156/29?
A . 10.57.126.152
B . 10.57.126.144
C . 10.57.126.0
D . 10.57.126.156

View Answer

Answer: A

Explanation:

The subnet address for 10.57.126.156/29 is 10.57.126.152. To find the subnet address, we need to perform a bitwise AND operation between the IP address and the subnet mask. The subnet mask for /29 is 255.255.255.248, which in binary is 11111111.11111111.11111111.11111000. The IP address in binary is 00001010.00111001.01111110.10011100. The result of the AND operation is 00001010.00111001.01111110.10011000, which in decimal is 10.57.126.152.

Reference: Ericsson IP Networking – IP Addressing, Software Installation and Upgrade Overview (Junos OS)