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

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热门试题

多项选择题Whichofthefollowingstatementsaretrueconcerningthecommandipslamonitorrespondertypetcpconnectipaddress10.1.1.1port23？（Chooseallthatapply.）（）

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

单项选择题Whichofthefollowingstatementsregardingdocumentationwouldnotbeconsideredahelpfulstepinthetroubleshootingprocess？（）

A.Use the Cisco Auto Configuration tool
B.Use the Cisco Rollback feature
C.Automate documentation
D.Schedule documentation checks
E.Use the Cisco Configuration Archive tool
F.Require documentation prior to a ticket being closed out

单项选择题WhichofthefollowingoptionsrepresentsthecorrectsequenceofDHCPmessagesafteraclientinitiallyboots？（）

A.DHCPREQUEST， DHCPOFFER， DHCPDISCOVER， DHCPACK
B.DHCPDISCOVER， DHCPOFER， DHCPREQUEST， DHCPACK
C.DHCPOFFER， DHCPACK， DHCPREQUEST， DHCPDISCOVER
D.DHCPDISCOVER， DHCPREQUEST， DHCPOFFER， DHCPACK
E.DHCPREQUE5T， DHCPDISCOVER， DHCPOFFER， DHCPACK
F.DHCPDISCOVER， DHCPACK， DHCPREQUEST， DHCPOFFER

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

A.Ensuring compliance with legal regulations and corporate policies
B.Troubleshooting problem reports
C.Planning for network expansion
D.Providing support to sales and marketing
E.Giving presentations to management
F.Monitoring and tuning network performance

多项选择题YouexaminetheportstatisticsonaCiscoCatalystswitchandnoticeanexcessivenumberofframesarebeingdropped.Whichofthefollowingarepossiblereasonsforthedrops？（）

A.Unknown destination MAC address
B.Bad cabling
C.MAC forwarding table is full
D.Port configured for half duplex
E.Port configured for full duplex
F.Network congestion