CompTIA Network+ (N10-007) — Question 478

After rebooting a PC, a user is no longer able to connect to the corporate network. As a test, the technician plugs a different laptop into the same network jack and receives an IP address of 169.254.112.137. Which of the following is MOST likely causing the issue?

Answer options

• A. DHCP scope exhaustion
• B. Improper DNS setting
• C. Incorrect ACL setting
• D. Port-security violation

Correct answer: A

Explanation

The IP address 169.254.112.137 indicates that the laptop is using a link-local address, which typically occurs when a device cannot obtain an IP address from a DHCP server. This suggests that the DHCP scope may be exhausted, preventing devices from receiving valid IP addresses. The other options do not directly relate to the inability to receive an IP address from the DHCP server.