Choosing an IPv6 link-local address | LinuC Level 1 102 Exam original practice question

1.07.1Basic

Identify an IPv6 unicast address usable only on the local link and not routed beyond it.

Which address is link-local?

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.

Global unicast: An IPv6 unicast range intended for routed public networks.
Unique local: The fc00::/7 range intended for private organizational networks.
Link-local: The fe80::/10 range limited to one local link.
Multicast: The ff00::/8 range used for multiple receivers.

Detailed explanation

Incorrect2001:db8::20

Incorrect. 2001:db8::/32 is documentation global-unicast space.

Incorrectfc00::20

Incorrect. fc00::/7 is unique-local space.

Correctfe80::20

Correct. fe80::20 belongs to fe80::/10.

Incorrectff02::20

Incorrect. ff00::/8 is multicast.

An example you can run in a temporary verification environment.

python3 -c "import ipaddress; print(ipaddress.ip_address('fe80::20').is_link_local)"

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-102-959

EnvironmentPython 3 ipaddress / 外部通信なし

Last technical review2026-08-13

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