CCNA: Cisco Certified Network Associate — Question 1365

An engineer must update the configuration on two PCs in two different subnets to communicate locally with each other. One PC is configured with IP address
192.168.25.128/25 and the other with 192.168.25.100/25. Which network mask must the engineer configure on both PCs to enable the communication?

Answer options

• A. 255.255.255.248
• B. 255.255.255.224
• C. 255.255.255.0
• D. 255.255.255.252

Correct answer: C

Explanation

The correct answer is C, 255.255.255.0, which allows both PCs to be on the same network (192.168.25.0). The other options do not provide a sufficient range of IP addresses to encompass both PCs within the same subnet, thus preventing local communication.