单项选择题

Which of the following is not a characteristic of Cisco Express Forwarding？（）

A.The adjacency table is populated from a router’s ARP cache
B.CEF does not require the first packet of a data flow to be process switched
C.CEF maintains the Forward Information Base and the adjacency table
D.CEF can be enabled with the interface command ip cef
E.The FIB is populated from a router’s IP routing table
F.On most router platforms CEF is enabled by default

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热门试题

多项选择题WhichofthefollowingisanunlikelyreasonfortheARPprocesstofail？（）

A.CEF switching is disabled on the switch
B.The source device and destination device are in different VLANs
C.The VLAN is excluded from the trunk
D.The host is connected to the switch through an IP phone
E.A faulty cable from host to switch or between switches
F.The trunking encapsulation type is inconsistent on the two ends of the link

多项选择题Whichofthefollowingarevalidmodesofpacketswitchingonmostrouters？（Chooseallthatapply.）（）

A.Cisco Express Fonvarding
B.FIB switching
C.Cache switching
D.Optimized switching
E.Process switching
F.Fast switching

单项选择题Whichofthefollowingmanagementtypescanbeusedtodeployappropriatequality-of-servicesolutionstomakethemostefficientuseofbandwidth？（）

A.Fault management
B.Accounting management
C.Operations management
D.Performance management
E.Security management
F.Configuration management

单项选择题Whichofthefollowingcommandsprovidesdataplaneinformationrequiredtoforwardapackettoaspecificipaddress？（）

A.sh ip route
B.sh ip cef 〈ip_address〉
C.sh adjacency 〈ip_address〉
D.sh ip route 〈ip_addres$〉
E.sh ip adjacency 〈/p_address〉
F.sh ip cef 〈mac_addrQss〉〈ip_address〉

多项选择题WhichofthefollowingcharacteristicsdescribetheRootGuardfeature？（Chooseallthatapply.）（）

A.The port must be put into forwarding state manually after root-inconsistent state has beencorrected
B.A Root Guard port receiving superior BPDU goes into a root-inconsistent state
C.A Root Guard port receiving inferior BPDU goes into a root-inconsistent state
D.While the port is in a root-inconsistent state no user data is sent across that port
E.The port returns to a forwarding state if inferior BPDUs stop
F.It should be applied to all switch ports