JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2023) — Question 30

Which statement describes optional transitive BGP attributes?

Answer options

• A. They must be supported in all BGP implementations, but do not have to be included in every BGP update.
• B. If they are not recognized, they are ignored and not passed to other peers.
• C. They must be supported by all BGP implementations and must be included in every BGP update.
• D. Although not required, they should be passed along, unchanged to other BGP peers when included.

Correct answer: D

Explanation

The correct answer, D, is accurate because optional transitive attributes are not required but should be passed along unchanged when present. Option A is incorrect as these attributes are not mandatory in every update. Option B is misleading because unrecognized attributes are indeed ignored, but they are not related to the forwarding aspect. Option C is false since these attributes do not need to be included in every update.