Nokia 4A0-113 Question Answer
Which of the following statements apply to link state protocol behavior? Choose three answers.
Routers broadcast the entire route table to all neighbors.
Information about directly connected links is sent to all neighbors.
An adjacency database is maintained by each router.
The sequence number for an update is incremented as it is flooded from router to router.
The topological database is the same for all routers in a single area.
Comprehensive and Detailed Explanation From Exact Extract:
According to Nokia 7750 SR OS Routing Protocols Guide (OSPF and IS-IS operation, Chapter: Link-State Protocol Operation):
B (Correct):
"Routers advertise information about directly connected links to all routers in the same area via link-state advertisements (LSAs)."
C (Correct):
"The adjacency database tracks established neighbor relationships, ensuring LSDB synchronization."
E (Correct):
"All routers within the same OSPF or IS-IS area have identical link-state databases after full synchronization."
Incorrect options:
A: Link-state protocols exchange only link-state information, not full routing tables (that’s distance-vector behavior).
D: Sequence numbers are incremented by the originator when generating LSAs, not by intermediate routers during flooding.
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TESTED 02 Jan 2026
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