Exam JN0-361 topic 1 question 16 discussion

C. Route4 is the correct answer.

Just to remind. This acronym is so useful guys: WLLA OMNI + RID + Cluster List Lentgh + Peer ID *RID is checked inmediately after IGP metric.

igp - is a 4th criteria. and the shortest AS Path length is 3th criteria. So the answer is D. The steps of the BGP selection algorithm are as follows: 1. The Next Hop attribute value for each route must be reachable in the local routing table; otherwise, the local router discards the route. 2. The router selects the route with the highest Local Preference attribute value. 3. The router selects the route with the shortest AS Path length. 4. The router selects the route with the smallest Origin attribute value. 5. The router selects the route with the smallest Multiple Exit Discriminator attribute value. This step is executed, by default, only for routes from the same neighboring AS. 6. The router selects routes learned from an EBGP peer over routes learned from an IBGP peer. If the remaining routes are all EBGP-learned routes, the router skips to step 9. 7. The router selects the route with the smallest IGP metric to the advertised BGP Next Hop. 8. If Route Reflection is used for IBGP peering, the router selects the route with the shortest Cluster-List length. Theory of Operation 339 9. The router selects the route from the peer with the smallest numerical Router ID. 10. The router selects the route from the peer with the smallest numerical Peer Address.

Prefer the path with the lowest origin type. Note: IGP is lower than Exterior Gateway Protocol (EGP), and EGP is lower than INCOMPLETE.