單項選擇題What is the first 24 bits in a MAC address called?（）

A. NIC
B. BIA
C. OUI
D. VAI


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1.單項選擇題What occurs on a Frame Relay network when the CIR is exceeded?（）

A.All TCP traffic is marked discard eligible.
B.All UDP traffic is marked discard eligible and a BECN is sent.
C.All TCP traffic is marked discard eligible and a BECN is sent.
D.All traffic exceeding the CIR is marked discard eligible.

2.多項選擇題It has become necessary to configure an existing serial interface to accept a second Frame Relay virtual circuit.Which of the following processes are required to accomplish this task?（）

A.configure static frame relay map entries for each subinterface network.
B.remove the ip address from the physical interface
C.create the virtual interfaces with the interface command
D.configure each subinterface with its own IP address
E.disable splithorizon to prevent routing loops between the subinterface networks
F.encapsulate the physical interface with multipoint PPP

3.單項選擇題which command allows you to verify the encapsulation type (CISCO OR IETF) for a frame relay link?（）

A.show frame-relay map
B.show frame-relay lmi
C.show inter serial
D.show frame-relay pvc

4.多項選擇題What two statistics appear in show frame-relay map output?（）

A.The number of FECN packets that are received by the router
B.The number of BECN packets that are received by the router.
C.The ip address of the local router
D.The value of the local DLCI
E.The status of the PVC that is configured on the router

5.多項選擇題Which are three reasons that an organization with multiple branch offices and roaming users might implement a Cisco VPN solution instead of point-to-point WAN links？（）

A.reduced cost
B.better throughput
C.increased security
D.scalability
E.reduced latency
F.broadband incompatibility