You work for ISP A. Customers of both ISP B and ISP C must be able to reach all of your customers, but your network must not allow transit traffic between ISP B and ISP C.Referring to the exhibit, which two methods could you use? (Choose two.)
A.
Use local preference to prefer the proper routes.
B.
Use the well-known no-transit community.
C.
Use policy to filter routes on AS number.
D.
Use communities to identify and filter routes.