Given the following:
The customer (AS 65100) is advertising the 172.0.0.0/8 prefix over the upper link without using AS-Path prepending.
The customer (AS 65100) is advertising the 172.0.0.0/8 prefix with a prepended AS-Path of AS 65100 65100 65100 65100 over the lower link.

Which two statements are true about the incoming traffic to 172.0.0.0/8? (Choose two)

A.
The lower link will be preferred over the upper link.

B.
The upper link will be preferred over the lower link.

C.
The upper link will act as a backup for the lower link.

D.
The lower link will act as a backup for the upper link.

E.
The upper and lower links will be used simultaneously for load balancing

Explanation:

1. B The upper link is preferred over the lower link, since, the shortest AS-PATH is preferred
2. D The lower link will act as a backup. If the upper link fails then the lower link will be the preferred path