A system administrator attempts to ping a hostname and the response is 2001:4860:0:2001::68.
Which of the following replies has the administrator received?

A.
The loopback address

B.
The local MAC address

C.
IPv4 address

D.
IPv6 address

Explanation:
IPv6 addresses are 128-bits in length. An IPv6 address is represented as eight groups of four
hexadecimal digits, each group representing 16 bits (two octets). The groups are separated by
colons (:). The hexadecimal digits are case-insensitive, but IETF recommendations suggest the
use of lower case letters. The full representation of eight 4-digit groups may be simplified by
several techniques, eliminating parts of the representation.