Whichof the following are valid modes of packet switching on most routers？（Choose all thatapply.）（）

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

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

A.User authentication ID and password
B.User profile
C.Output of debug
D.Output of show interface
E.Result of ping
F.Output of show process cpu

多项选择题Whichofthefollowingarecommonissuesthatshouldbeconsideredwhenestablishingortroubleshootingsite-to-siteVPNs？（Chooseallthatapply.）（）

A.User authentication
B.Overlapping IP address space
C.GRE or IPsec configuration
D.MTU size
E.VPN client software
F.Authentication server configured ly