JNCIP-SP: Juniper Networks Certified Professional – Service Provider (2023) — Question 13

You want to ensure that a single-area OSPF network will be loop free.
In this scenario, what are two requirements that satisfy this requirement? (Choose two.)

Answer options

• A. The DR/BDR ensures that each node within an area has the same information in their LSDBs.
• B. The Shortest Path First algorithm must prune looped paths.
• C. Nodes within an area must connect in a full mesh.
• D. All nodes within an area must have the same information in their LSDBs.

Correct answer: B, D

Explanation

The correct answers are B and D because the Shortest Path First algorithm is designed to prevent loops by pruning any paths that could create them, while having all nodes with the same LSDB information ensures consistency in routing decisions. Options A and C are incorrect; A pertains to the role of the DR/BDR but doesn't directly prevent loops, and C is not a requirement for OSPF operation.