A.when one side of the connection is configured for half-duplex

B.when the cable length limits are exceeded

C.when a collision occurs after the 32nd byte of a frame has been transmitted The usual possible causes are full-duplex/half-duplex mismatch, exceeded Ethernet cable length limits, or defective hardware such as incorrect cabling, non-compliant number of hubs in the network, or a bad NIC.

D.when Carrier Sense Multiple Access/Collision Detection is used

E.when the sending device waits 15 seconds before sending the frame again

A.cost

B.metric

C.longest prefix

D.administrative distance

A.The ACL trace tool in Cisco APIC-EM

B.The ACL path analysis tool in Cisco APIC-EM

C.The Cisco IWAN application.

D.The Cisco APIC-EM automation scheduler.

A.A syslog message is generated

B.The port LED turns off

C.The security violation counter dose not increment

D.The interface drops traffic from unknown MAC address

E.The interface is error-disabled