单项选择题

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

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单项选择题

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

单项选择题

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

多项选择题

Which of the following statements are true concerning the command ip sla monitor responder typetcpconnect ipaddress 10.1.1.1 port 23？（Choose all that apply.）（）

A.The command will initiate a probe with a destination IP address of 10.1.1.1
B.The command is used on the IP SLA responder and the IP SLA source
C.The command will allow only source address 10.1.1.1 to source probes
D.The command will initiate a probe with a destination Telnet port
E.The command is used to make the router a responder
F.The command will initiate a probe with a source port of 23