Choosing the IPv6 unspecified address | LinuC Level 1 102 Exam original practice question

1.07.1Basic

Identify the value used when an IPv6 address is not yet known or when a service listens on any local IPv6 address.

Which is the IPv6 unspecified address?

Hint 1: Focus on protocol roles

Separate reliable transport, datagram transport, IP control messages, and name resolution before comparing the choices.

Hint 2: Key terms

Review the short definitions of transport protocols, control messages, and name resolution involved.

IPv6 unspecified: The all-zero address used when an IPv6 interface address is not yet selected.
IPv6 loopback: The ::1/128 address used to refer to the local host.
Link-local: The IPv6 unicast range valid only on the local link.
Multicast: The ff00::/8 range used for multiple destinations.

Detailed explanation

Incorrect::1

Incorrect. ::1 is loopback.

Correct::

Correct. :: is the all-zero unspecified address.

Incorrectfe80::

Incorrect. fe80:: is in the link-local range.

Incorrectff00::

Incorrect. ff00:: is the start of the multicast range.

An example you can run in a temporary verification environment.

python3 -c "import ipaddress; print(ipaddress.ip_address('::').is_unspecified)"

True

Foundation review

The part of an IP address that identifies the network rather than a host.

TCP and UDP provide different delivery, reliability, and connection semantics.

A numbered endpoint used to deliver traffic to a network service.

Question IDKL-102-958

EnvironmentPython 3 ipaddress / 外部通信なし

Last technical review2026-08-13

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