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Which of the following is a valid IPv4 loopback address?

A technician, Joe, needs to troubleshoot a recently installed NIC. He decides to ping the local loopback address. Which of the following is a valid IPv4 loopback
address?

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A.
10.0.0.1

B.
127.0.0.1

C.
172.16.1.1

D.
192.168.1.1

Explanation:
The loopback address is a special IP address that is designated for the software loopback interface of a computer. The loopback interface has no hardware

associated with it, and it is not physically connected to a network. The loopback address causes any messages sent to it to be returned to the sending system. The
loopback address allows client software to communicate with server software on the same computer. Users specify the loopback address which will point back to
the computer’s TCP/IP network configuration.
In IPv4, the loopback address is 127.0.0.1.
In IPv6, the loopback address is 0:0:0:0:0:0:0:1, more commonly notated as follows. ::1

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