Nokia Certified Network Associate – IP/MPLS Services — Question 8

A BGP router receives the following routes. Which route is selected as best route?
1) 192.169.20.0/24 with local preference 100, MED 150, AS Path 65300 65200 from an eBGP neighbor
2) 192.169.20.0/24 with local preference 100, MED 100, AS Path 63200 from an iBGP neighbor
3) 192.169.20.0/24 with local preference 200, MED 150, AS Path 65400 63200 from an iBGP neighbor
4) 192.169.20.0/24 with local preference 200, MED 100, AS Path 63700 from an eBGP neighbor

Answer options

• A. Route 1
• B. Route 2
• C. Route 3
• D. Route 4

Correct answer: D

Explanation

The best route is determined first by the highest local preference, and since Routes 3 and 4 have the highest local preference of 200, Route 4 is preferred due to its eBGP origin. Routes 1 and 2 have lower local preferences and thus are not selected.