100-150 Question 87
Select 2You are troubleshooting a network issue where a device with the IPv4 address 192.168.1.10/24 cannot communicate with a device using the IPv4 address 192.168.2.15/24. Which of the following are the most likely reasons for the communication failure?
- A
The devices belong to different subnets and require a router for communication.
- B
The subnet mask for both devices is incorrect.
- C
The devices are using the same subnet prefix, so they conflict with each other.
- D
A routing configuration is missing or misconfigured.
- E
One of the devices is using an invalid private IP address.
Show answer and explanation
Correct answers: A, D
Explanation
Devices in different subnets cannot communicate directly. A router or proper routing configuration is required to enable communication between subnets. Without it, packets cannot traverse from one subnet to another.
- A. Correct.
Correct. The two devices are in different subnets (192.168.1.0/24 and 192.168.2.0/24), so a router is required for them to communicate.
- B. Incorrect.
Incorrect. The subnet mask /24 (255.255.255.0) is correct for both devices, so this is not the issue.
- C. Incorrect.
Incorrect. The devices are not on the same subnet prefix; they are on different subnets, so there is no conflict.
- D. Correct.
Correct. A router or a routing configuration is needed to enable communication between different subnets. If this is missing or misconfigured, the devices will not communicate.
- E. Incorrect.
Incorrect. Both 192.168.1.10 and 192.168.2.15 are valid private IP addresses, so this is not the reason for the issue.