200-301 Question 28
Select 3A network administrator is troubleshooting connectivity issues between two devices in a corporate network. The endpoints involved are a desktop computer and a wireless printer. The desktop is connected to the network via Ethernet, while the printer is connected via Wi-Fi. Both devices are in the same VLAN and have valid IP addresses. However, they cannot communicate with each other. Which of the following could be the potential cause of the issue?
- A
A misconfigured VLAN on the network switch
- B
A wireless access point operating in isolation mode
- C
A subnet mismatch between the two devices
- D
An outdated printer driver on the desktop computer
- E
A physical cable issue between the desktop and the switch
Show answer and explanation
Correct answers: A, B, C
Explanation
Endpoints on the same VLAN and with valid IP addresses should be able to communicate. However, misconfigurations such as VLAN issues, isolation mode on the wireless access point, or subnet mismatches can prevent communication. Understanding and diagnosing these issues is essential for network troubleshooting.
- A. Correct.
A misconfigured VLAN on the network switch could prevent communication between endpoints even if they have valid IP addresses, as VLANs segment traffic.
- B. Correct.
Some wireless access points have an isolation mode that prevents wireless devices from communicating with wired devices, which would block communication between the desktop and printer.
- C. Correct.
If the devices are on different subnets, they will not be able to communicate directly without a router or Layer 3 device facilitating the connection.
- D. Incorrect.
An outdated printer driver on the desktop would not affect network-level communication but could cause issues specific to printing tasks.
- E. Incorrect.
A physical cable issue would prevent the desktop from connecting to the network entirely, but the problem described is specific to communication between devices already on the network.