Question:
A user calls to report that a PC cannot access the internet. The network technician asks the user to issue the command ping 127.0.0.1
in a command prompt window. The user reports that the result is four positive replies. What conclusion can be drawn based on this connectivity test?
- The PC can access the network. The problem exists beyond the local network.
- The IP address obtained from the DHCP server is correct.
- The PC can access the Internet. However, the web browser may not work.
- The TCP/IP implementation is functional.
Explanation: The ping 127.0.0.1 command is used to verify that the TCP/IP stack is functional. It verifies the proper operation of the protocol stack from the network layer to physical layer, without sending a signal on the media. That is, this test does not go beyond the PC itself. For example, it does not detect whether a cable is connected to the PC or not.
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