Practice Quiz

CompTIA A+ 220-801

Category - 801: Networking

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You ping the loopback address, but do not receive any response. What is the most likely source of this problem?
  1. DSL router is down.
  2. DNS server is offline.
  3. Network card is being throttled.
  4. TCP/IP protocol is not functioning.
Explanation
Answer: D - If pinging a loop back address does not give a reply, it is most likely that the NIC is faulty and the TCP/IP protocol is not functioning.

Key Takeaway: 127.0.0.1 is the loopback address of a computer. Pinging the loopback address determines if the NIC is working. If the ping request fails, then the NIC needs to be re-seated or changed.
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