What is the difference in implementation between the edge router and the ISP router in the SAFE SMR medium network design?

A.
The ISP router is configured for rate limiting.

B.
The edge router is configured for rate limiting.

C.
The ISP router is configured for more aggressive rate limiting.

D.
The edge router is configured for more aggressive rate limiting.

Explanation:
The primary function of the customer-edge router in the ISP is to provide connectivity to the Internet or ISP network. The egress out of the ISP router rate limits nonessential traffic that exceeds prespecified thresholds in order to mitigates against DDoS attacks.
REF;Safe white papers;page 18
SAFE: Extending the Security Blueprint to Small, Midsize, and Remote-User Networks