CompTIA Network+ (N10-009)Networking ConceptsHard
A technician examines an IPv6 address configured automatically on a workstation's interface: FE80::A1B2:3C4D:5E6F:7A8B. What type of address is this?
- ALink-local address
- BMulticast address
- CUnique local address
- DGlobal unicast address
Show answer & explanationAnswer & explanation
Correct answer: A. Link-local address
Addresses beginning with the prefix FE80::/10 are link-local addresses, automatically assigned to every IPv6 interface for communication only within the local network segment; they are never routed beyond the local link.
Why the other options are wrong
- B. Multicast addresses start with FF00::/8, not FE80::.
- C. Unique local addresses are used for private routing within an organization and start with FC00::/7.
- D. Global unicast addresses are routable on the internet and typically start with 2000::/3.
IPv6 Link-Local Address
An IPv6 address automatically assigned to an interface, beginning with the prefix FE80::/10, used only for communication within the same local network segment and never routed.
- Automatically generated via SLAAC even without a router
- Required on every IPv6-enabled interface
- Never forwarded by routers to other networks
Memory trick: FE80 stays at home, never leaves the local link