Which of the following IPv6 addresses represents the loopback address?

Correct option is D

The ::1/128 IPv6 address is the loopback address used to refer to the local host. It is equivalent to 127.0.0.1 in IPv4 and is used to test the networking stack of the local machine.
Important Key Points:
1. Loopback Address in IPv6 is represented by ::1/128. It is used for local testing, similar to IPv4's 127.0.0.1.
2. This address allows a device to communicate with itself, primarily for diagnostic purposes.
3. The /128 specifies that this is a single address, not a range or subnet.
Knowledge Booster:
· fe80::1: Represents an IPv6 link-local address used for communication within the local network segment.
· 2001:0db8:85a3::8a2e:0370:7334: This is an example of an IPv6 Global Unicast address commonly used for addressing nodes on the public internet.
· ff02::1: Represents the IPv6 multicast address for all nodes on the local network segment.
· 2400:cb00:2048:1::c629:d7a2: This is an example of an IPv6 global unicast address, typically assigned to a public network.