Which statement is correct about the Cisco IOS Control Plane Protection feature?
A.
Control Plane Protection is restricted to the IPv4 or IPv6 input path.
B.
Traffic that is destined to the router with IP options will be redirected to the host control plane.
C.
Disabling CEF will remove all active control-plane protection policies. Aggregate control-plane
policies will continue to operate.?
D.
The open-port option of a port-filtering policy allows access to all TCP/UDP based services that
are configured on the router.
Explanation:
“Requires CEF
Control Plane Protection depends on Cisco Express Forwarding (CEF) for IP packet redirection. If you disable CEF globally, this will remove all active protect and policing policies configured on the control-plane subinterfaces. Aggregate control-plane interface policies will continue to function as normal.” – http://www.cisco.com/c/en/us/td/docs/ios/12_4t/12_4t4/htcpp.html
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