多項選擇題Which of the following statements concerning IGMP are correct?(Choose all that apply.)()

A.With IGMPvl, queries are sent to a specific group
B.Hosts issuing IGMPvl requests will be correctly interpreted by IGMPv2 hosts due to backwardcompatibility
C.An IGMPv2 router will ignore IGMPv2 leave messages when IGMFVl hosts are present
D.With IGMFV2, a leave message is supported
E.An IGMPv2 host will send an IGMFVl report on an IGMFVl router
F.An IGMPv2 router can only allow IGMPv2 hosts to execute a join request


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1.多項選擇題Which of the following pieces of information will the command show interface provide?(Choose allthat apply.)()

A.Layer 1 status
B.Output queue drops
C.Interface CPU utilization
D.Cable type connected to interface
E.Layer 2 status
F.Input queue drops

2.單項選擇題Which of the following commands will display a router’s crypto map IPsec security associationsettings?()

A.show crypto map ipsec sa
B.show crypto map
C.show crypto engine connections active
D.show ipsec crypto map
E.show crypto map sa
F.show ipsec crypto map sa

3.單項選擇題Which of the following is not a characteristic of fast switching?()

A.Fast switching reducesa routers CPU utilization, compared to process switching
B.All packets of a flow, except for the first packet, use the information in the fast cache
C.It can be enabled with the interface command ip route-cache
D.Fast switching uses a fast cache maintained in a router’s control plane
E.The fast cache contains information about how traffic from different data flows should beforwarded
F.Even though the fast switching is enabled, the first packet of a flow is still process switched

4.單項選擇題Which of the following commands will restore a previously archived configuration by replacing therunning configuration with the archived configuration?()

A.configure archive running-config
B.configure replace
C.copy archive running config
D.copy startup-config running-config
E.copy tftp running-config
F.configure tftp running-config

5.單項選擇題In what situation would the command ip helper-address be required?(Choose the best answer.)()

A.Only when there is a duplicate IP address caused by a combination of static and dynamic IPaddress allocations
B.On each router that exists between the client and the server
C.Only when a router separates the client from the server
D.Only if the DHCP sever issues a DHCPNAK to the initial request
E.Only when the client is on the same subnet as the server
F.Only when the DHCP pool is out of IP addresses

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