CompTIA A+ Core 1 (220-1101) — Question 76

A user reports limited or no connectivity on a laptop. A technician runs ipconfig /all with the following result:
IPv4 connectivity...limited or none

IPv4 address...169.254.254.1 -
subnet mask...255.255.0.0
default gateway...
Which of the following is the MOST likely cause of this issue?

Answer options

• A. DHCP failure
• B. ARP cache
• C. DNS resolution
• D. Duplicate IP address

Correct answer: A

Explanation

The output indicates that the laptop has an APIPA address (169.254.x.x), which is assigned when a device cannot obtain an IP address from a DHCP server. This suggests a DHCP failure as the most likely cause. The other options, such as ARP cache, DNS resolution, and duplicate IP address, do not directly relate to the lack of a proper IP assignment leading to limited connectivity.