Nokia Network Routing Specialist II (NRS II) 4A0-112 Question # 12 Topic 2 Discussion
4A0-112 Exam Topic 2 Question 12 Discussion:
Question #: 12
Topic #: 2
On a broadcast interface, an IS-IS router receives an LSP that is newer than the one on its database. Which of the following statements best describes the actions taken by the router as a consequence?
A.
The router sends back a copy of the LSP from its database to its neighbor.
B.
The router updates its database with the LSP and floods a copy to its neighbors on other interfaces.
C.
The router updated its database with the LSP, acknowledges the LSP with a PSNP, and floods a copy to its neighbors on other interfaces.
D.
The router updates its database with the LSP and acknowledges it with a PSNP.
When an IS-IS router receives a newer LSP (Link-State PDU) than the one already in its database, it takes the following actions:
Updates its link-state database with the new LSP.
Acknowledges the LSP with a PSNP (Partial Sequence Number PDU), which is sent to the router that originated the LSP, confirming the receipt of the newer LSP.
Floods a copy of the updated LSP to its neighbors on other interfaces to ensure all routers in the network have the updated topology information.
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