Nokia Certified Network Associate – IP/MPLS Services — Question 6

What kind of BGP path attribute is AS_PATH?

Answer options

• A. Optional transitive
• B. Optional non-transitive
• C. Well-known discretionary
• D. Well-known mandatory

Correct answer: D

Explanation

AS_PATH is classified as a Well-known mandatory attribute because it must be present in all BGP updates. The other options describe attributes that are either not required in every update or have different characteristics that do not apply to AS_PATH.