单项选择题
In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN（）。
A.during high traffic periods
B.after broken links are re-established
C.when upper-layer protocols require high reliability
D.in an improperly implemented redundant topology
E.when a dual ring topology is in use
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相关考题
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单项选择题
There are no boot system commands in a router configuration in NVRAM. What is the fallback sequence that the router will use to find an IOS during reload（）。
A.TFTP server, Flash, NVRAM
B.ROM, NVRAM, TFTP server
C.NVRAM, TFTP server, ROM
D.Flash, TFTP server, ROM
E.Flash, NVRAM, ROM -
单项选择题
Which type of EIGRP route entry describes a feasible successor?（）
A.a primary route,stored in the routing table
B.a backup route,stored in the routing table
C.a backup route,stored in the topology table
D.a primary route,stored in the topology table -
多项选择题
以下哪两个安全工具能被安装在一个网络里？（）
A.ATM
B.IDS
C.IOS
D.IOX
E.IPS
F.SDM
