Exam ANS-C00 topic 1 question 164 discussion

Impossible to answer without knowing destination IP

Seriously, I think the people who come up this question don't know about networking. This question depends on what IP AWS uses to reach your site... Also, who has site with just a /30 prefix?

:D no destination IP, how should we know :D also, answer B contains 3 ASN, while in the question there is 1 ASN

Longest prefix always wins

DX will be preferred over VPN connection. 10.0.0.0/16 route is more specific than 10.0.0.0/8, thus D should be a right answer.

Agree that DX have priority over VPN but keep in mind that more specific prefix always win.

what???? hahaha

B ===Route selection Longest prefix match applies. If the prefixes are the same, then the virtual private gateway prioritizes routes as follows, from most preferred to least preferred: BGP propagated routes from an AWS Direct Connect connection Manually added static routes for a Site-to-Site VPN connection BGP propagated routes from a Site-to-Site VPN connection For matching prefixes where each Site-to-Site VPN connection uses BGP, the AS PATH is compared and the prefix with the shortest AS PATH is preferred. https://docs.aws.amazon.com/vpn/latest/s2svpn/VPNRoutingTypes.html#vpn-route-priority

question is bad and answer are different lol I will go with D DX is better than VPN. Also C has one as-path vs D that has none in the answer but 3 in the question

https://docs.aws.amazon.com/vpn/latest/s2svpn/VPNRoutingTypes.html#vpn-route-priority When a virtual private gateway receives routing information, it uses path selection to determine how to route traffic. Longest prefix match applies. If the prefixes are the same, then the virtual private gateway prioritizes routes as follows, from most preferred to least preferred: BGP propagated routes from an AWS Direct Connect connection Manually added static routes for a Site-to-Site VPN connection BGP propagated routes from a Site-to-Site VPN connection For matching prefixes where each Site-to-Site VPN connection uses BGP, the AS PATH is compared and the prefix with the shortest AS PATH is preferred.

ANS should be D. As both A & B are not the same CIDR as in the question. C -is larger one. So, D more specific Route is /16.

That question is aweful However, let's gamble B: no. "Your network" is probably something more than a /30 A: no. VPN A has 10.1.0.0/24, while the answer states "10.0.1.0/24" This leaves C and D .. Take a random pick ?