Alcatel-Lucent NRS I – Interior Routing Protocols and High Availability — Question 19

Which of the following statements regarding link state protocols are true? (Choose two)

Answer options

• A. When a router receives updates from its neighbors, it adds them to its link state database, performs an SPF computation, and sends the results to its neighbors.
• B. An SPF computation is done by each router to determine the best path to destination networks. All the best paths determined by the SPF calculation will be seen in the route table.
• C. Each router constructs its own link state database with updates received from neighbors.
• D. An SPF computation is done by each router to determine the best path to destination networks. All the best paths determined by the SPF calculation will be

Correct answer: C, D

Explanation

Option C is correct because each router indeed creates its own link state database based on the information it receives from its neighbors. Option D is also correct as it highlights that SPF computations help routers identify the best paths to destinations. Options A and B are incorrect because they imply that all routers share their SPF results with neighbors, which is not how link state protocols operate.