JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing — Question 18

Which role does the router ID (RID) have in the BGP route selection process?

Answer options

• A. The router ID is evaluated immediately after MED to determine route preference
• B. The router ID is evaluated last in the route selection process
• C. The router ID is evaluated after the cluster length and a lower router ID is chosen
• D. The router ID is evaluated after analyzing the IGP metric cost

Correct answer: C

Explanation

The correct answer is C because the router ID is compared after the cluster length, and the BGP process will choose the route with the lower router ID thereafter. Options A and B are incorrect as they misrepresent the sequence of evaluation, while option D incorrectly places the router ID evaluation after IGP metrics, which is not accurate.