Practice Quiz

CompTIA Network+

Category - Management

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You are the technician at ABCD.com. You want to ping the loopback address on a PC which has been configured with the static IP address of 192.168.1.122. What commands would you use to achieve this?
  1. Ping 0.0.0.0
  2. Ping 127.0.0.1
  3. Ping 192.168.1.122
  4. Ping 255.255.255.255
Explanation
Answer: B - Use the ping 127.0.0.1 command to perform the loopback test. This test should be performed locally on the computer.

Key Takeaway: Loopback address is an address that sends outgoing signals back to the same computer for testing. In a TCP/IP network, the loopback IP address is 127.0.0.1, and pinging it will always return a reply if the NIC is working properly and TCP/IP is bound to it. The loopback address allows a network administrator to treat the local machine as if it were a remote machine.
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