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
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A.OSPF
B.ISIS
C.BGP
D.RSVP
E.PIM
A.IS-Type
B.Overload （LSPDBOL）
C.Pseudonode （PN）
D.Attached （ATT）
E.Fragment （Frag-Nr）
F.Partition （P）
A.bgp
B.mpls_idp
C.sysmgr
D.wdsysmon
E.gsp
A.normal
B.select
C.random
D.discard
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B.IP Precedence 3
C.IP Precedence 4
D.IP Precedence 5
E.IP Precedence 6
F.IP Precedence 7
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