Your network is receiving the 203.0.113.0/24 network using EBGP from AS 64500 and AS 64501. Both of these advertisements have identical local-preference values, AS-path lengths, and BGP origin codes. You want to influence the way your AS sends traffic to the 203.0.113.0/24 network.
In this scenario, which attribute would you consider next when selecting the best path?
When deciding the best path in BGP route selection, if local-preference values, AS-path lengths, and BGP origin codes are identical, the next attribute to be considered is the MED (Multi-Exit Discriminator) value. MED is used to influence the incoming traffic from different ASes, making it the next tie-breaker in this scenario where routes from different ASes (AS 64500 and AS 64501) are being compared.
B (MED) is wrong, as by default, the MED attribute is only compared for routes received from the same neighbouring AS. The next feasible tiebreaker in the BGP route selection algorithm would be Router ID.
D should be the correct answer: IGP Metric Step-6 of the path selection algorithm: Prefer path whose next-hop is resolved by IGP route with lowest IGP metric.
D: Should be IGP Metric https://networklessons.com/bgp/bgp-attributes-and-path-selection https://www.juniper.net/documentation/us/en/software/junos/vpn-l2/bgp/topics/concept/routing-protocols-address-representation.html
MED is used to influence inbound traffic so it's not the correct answer. In this case Router ID is the tie beaker.
https://www.juniper.net/documentation/us/en/software/junos/vpn-l2/bgp/topics/concept/routing-protocols-address-representation.html
MED is ruled out as this is for entering traffic. for exit traffic next after MED is Lowest IGP Metric. so Answer D