CompTIA Network+ (N10-006) — Question 45

A desktop computer is connected to the network and receives an APIPA address but is unable to reach the VLAN gateway of 10.10.100.254. Other PCs in the
VLAN subnet are able to reach the Internet.
Which of the following is MOST likely the source of the problem?

Answer options

• A. 802.1q is not configured on the switch port
• B. APIPA has been misconfigured on the VLAN
• C. Bad SFP in the PC's 10/100 NIC
• D. OS updates have not been installed

Correct answer: A

Explanation

The correct answer is A because if 802.1q is not configured on the switch port, the PC may not be able to communicate with the VLAN, leading to an APIPA address. The other options are less likely; APIPA misconfiguration (B) is improbable if other PCs can connect, a bad SFP (C) would affect all traffic, and OS updates (D) typically wouldn’t prevent VLAN access.