A、CoPP protects against IP spoofing；Racl protects against DoS attacks.

B、CoPP can not use named access lists；Racl can use named access lists

C、CoPP applies to a dedicated control plane interface；Racl applies to all interfaces.

D、CoPP needs a AAA server，Racl does not need a AAA server

E、CoPP supports rate limits；Racl does not support rate limits