CompTIA Network+ (N10-009) — Question 254

While troubleshooting connectivity issues, a junior network administrator is given explicit instructions to test the host’s TCP/IP stack first. Which of the following commands should the network administrator run?

Answer options

• A. ping 127.0.0.1
• B. ping 169.254.1.1
• C. ping 172.16.1.1
• D. ping 192.168.1.1

Correct answer: A

Explanation

The command 'ping 127.0.0.1' is used to test the local TCP/IP stack, confirming that the network interface is functioning correctly. The other options ping different addresses that may not be local, and therefore, they will not effectively test the host's own TCP/IP stack.