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CompTIA 220-801 Certification Practice Test

Category - Essentials

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A PC has been configured with a static IP address of 192.168.1.122. Bill tries to run the ping 127.0.0.1 command on this PC, but does not receive any reply for this command. What should he infer from this?
  1. The network interface card (NIC) is faulty
  2. The network cable is faulty
  3. The technician should run the ping 192.168.1.122 command
  4. The DNS server is offline
Explanation
Answer - A - If a loopback test fails, it means that the NIC is faulty.

Key Takeaway: Pinging 127.0.0.1 is known as the loopback test. A loopback address tells the computer not to test its connections to another computer, but to test its own basic network setup. If this test fails, then it can be inferred that the NIC is faulty and the card needs to be replaced.
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