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
相关考题
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单项选择题
TherearenobootsystemcommandsinarouterconfigurationinNVRAM.WhatisthefallbacksequencethattherouterwillusetofindanIOSduringreload?（）
A.TFTP server, Flash, NVRAM
B.ROM, NVRAM, TFTP server
C.NVRAM, TFTP server, ROM
D.Flash, TFTP server, ROM
E.Flash, NVRAM, ROM -
多项选择题
Whataresomeoftheadvantagesofusingaroutertosegmentthenetwork?(Choosetwo.)（）
A.Filtering can occur based on Layer 3 information.
B.Broadcasts are eliminated.
C.Routers generally cost less than switches.
D.Broadcasts are not forwarded across the router.
E.Adding a router to the network decreases latency. -
单项选择题
Anadministratorissuesthecommandping127.0.0.1fromthecommandlinepromptonaPC.Ifareplyisreceived,whatdoesthisconfirm?（）
A.The PC has connectivity with a local host.
B.The PC has connectivity with a Layer 3 device.
C.The PC has a default gateway correctly configured.
D.The PC has connectivity up to Layer 5 of the OSI model.
E.The PC has the TCP/IP protocol stack correctly installed.
