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?

A.
10.0.0.1

B.
127.0.0.1

C.
172.16.1.1

D.
192.168.1.1