Click the Exhibit button.
You are an employee of ISP A. You must not allow traffic between ISP B and ISP C to cross your network, but customers of ISP B and ISP C must be able to reach your customers. Referring to the exhibit, which two actions would do this? (Choose two.)
A. Use communities to identify and filter routes.
B. Use policy to filter routes on AS number.
C. Use origin code to identify and filter routes.
D. Use the well-known no-advertise community.
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A & B are right.
D is wrong, as it says customers of B and customers of C must be able to reach your customers. if using the no-advertise, then ISP-A’s customers will not receive B & C’s prefixes.