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CompTIA 220-801 Certification Practice Test

Category - Essentials

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You are the technician at ABCD.com. You want to ping the loopback address on a PC that 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: The loopback address sends outgoing signals back to the same computer for testing. In a TCP/IP network the loopback IP address is always 127.0.0.1 and pinging it will return a reply. The loopback address allows a network administrator to treat the local machine as if it were a remote machine.
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