Which of the following describes an IPv6 address of ::1?

A.
Broadcast

B.
Loopback

C.
Classless

D.
Multicast

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, which can be shortened to ::1