1. Veryfy that the next hop is reachable
2. Perfer the path with highest weight
3. Prefer the path with highest LOCAL_PREF(100 by default)
4. Prefer the path that was originated locally or through redistribution from an IGP
5. Prefer the path with the smaller AIGP
6. Prefer the path with the shortest AS_PATH
7. Prefer the path with the lowest origin type
8. Prefer the path with the lowest MED
9. Prefer eBGP over iBGP paths
10. Prefer the path with the lowest IGP metric to the BGP next hop
11. Determine if multiple paths require installation in routing table
12. Prefer the path that was received first (Oldest)
13. Prefer the route that comes from the BGP router with the lowest router ID
14. Prefer the path with the minimum cluster list length
15. Prefer the path that comes from the lowest neighbor address
I totally agree with Samarjit1983. This can be a CISCO CERT EXAM but if you check the BGP RFC (https://www.rfc-editor.org/rfc/rfc4271#section-5) it does not mention anything about weight attribute in the whole document. So, or they change the wording in the question to specify "from cisco point of view" or the answer should be local-preference
Regarding my previous post, I'm saying that because with this question I'm not sure if they want to evaluate my knowledge about the BGP path selection in a Cisco router (in which case the correct answer would be "weight") or if they want to evaluate my knowledge of the BGP protocol and their official attributes according to the RFC (in which case the correct answer is local-preference)
Weight values are not carried in bgp update, so it cannot be classified as BGP Path attribute ... .is weight is the most powerful feature to control outbound traffic but it should be termed as path attribute
For Cisco Routers Weight IS a BGP Path Atribute, and has the maximum priority even above local preference. Weight is propietary to Cisco, but this is a Cisco exam so it is relevant.
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