Exam JN0-682 topic 1 question 61 discussion

BD BD BD

The correct answer is A loops 2 + D advertise-peer-as https://www.juniper.net/documentation/us/en/software/junos/routing-policy/bgp/topics/example/bgp-advertise-peer-as.html Device R2 receives these loopback interface routes, and the advertise peer-as statement allows Device R2 to advertise them. Specifically, Device R1 sends the 192.168.0.1 route to Device R2, and because Device R2 has the advertise peer-as configured, Device R2 can send the 192.168.0.1 route to Device R3. Likewise, Device R3 sends the 192.168.0.3 route to Device R2, and advertise peer-as enables Device R2 to forward the route to Device R1. To enable Device R1 and Device R3 to accept routes that contain their own AS number in the AS path, the loops 2 statement is required on Device R1 and Device R3.

If you configure loops 2, the route is hidden if the local device’s AS number is detected in the path two or more times. => loop 2 will not working for load-balancing https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/ref/statement/loops-edit-routing-options-autonomous-system.html

AB is the right answer

yes, BD is correct

If you include the advertise-peer-as statement in the configuration, BGP advertises routes learned from one external BGP (EBGP) peer back to another EBGP peer in the same autonomous system (AS) but not back to the originating peer. Another way to disable the route suppression default behavior is with the as-override statement. If you include both the as-override and no-advertise-peer-as statements in the configuration, the no-advertise-peer-as statement is ignored. https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/ref/statement/advertise-peer-as-edit-protocols-bgp.html

AB is correct