单项选择题

Howlongwillaportremaininthelisteningstatebydefault？（）……

How long will a port remain in the listening state by default？（）

A.Depends on the number of switches in the spanning tree domain
B.50 seconds
C.15 seconds
D.Until the root directs it to start forwarding
E.20 seconds
F.Depends on the pott speed

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热门试题

多项选择题WhichofthefollowingcommandscanbeusedtogatherinformationabouttheAS-PATHofaBGProute？（Chooseallthatapply.）（）

A.show ip bgp neighbors
B.debug ip bgp updates
C.show ip route bgp
D.show ip bgp
E.show ip bgp summary
F.sh ip bgp database

单项选择题Whichofthefollowingisanaccuratedescriptionofthecommandcopystartup-configftp： kevin：cisco@192.168.1.74？（）

A.The configuration on the FTP server is copied to RAM
B.The command is not valid on a Cisco router
C.The configuration file in RAM is copied to an FTP server
D.The configuration file in NVRAM is copied to an FTP server
E.The configuration on the FTP server is copied to NVRAM
F.The configuration will be copied from NVRAM to an FTP server with a filename of Kevin

单项选择题GiventhemulticastIPaddressof224.193.5.10，whatwouldthecorrespondingmulticastMACaddressbe？（）

A.00-00-0c-c0-05-0a
B.00-00-0c-cl-05-0a
C.01-00-5e-00-00-0c
D.01-00-5e-41-05-0a
E.00-00-0c-01-00-5e
F.01-00-5e-cl-05-0a

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

A.Memory requirements are higher for shared distribution tree than for source distribution tree
B.Creates a tree from a central RP to all last-hop routers
C.Uses a rendezvous point
D.An optimal path is created between each source router and each last-hop router
E.Place （S，G） entry in each router’s multicast routing table
F.Place （*，G） entry in a router’s multicast routing to table

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

A.Statically defined RP
B.Bootstrap Router
C.Auto-RP
D.RP Discovery Protocol （RDP）
E.RP Helios
F.RPARP（RARP）