单项选择题

There are no boot system commands in a router configuration in NVRAM.What is the fall back sequence that router will use to find an ios during reload？（）

A.Flash，TFTPserver，ROM
B.Flash，NVRAM，ROM
C.ROM，NVRAM，TFTPserver
D.NVRAM，TFTPserver，ROM
E.TFTPserver，Flash，NVRAM

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单项选择题

根据下图，Switch1刚刚完成重启，并完成上电自检。HostA发送它的第一个侦到HostC，交换机首先会对switching table做什么操作（）

A.Switch1会添加192.168.23.4到switchingtable
B.Switch1添加192.168.23.12到switchingtable
C.Switch1添加000A 8A47.E612到switchingtable
D.Switch1添加000B DB95.2EE9到switchingtable

单项选择题

哪种扩频技术是802.11B定义使用的？（）

A.IR
B.DSSS
C.FHSS
D.DSSS and FHSS
E.IR，FHSS，and DSSS

单项选择题

What is the effect of the following access list condition access-list 101 permit ip 10.25.30.0 0.0.0.255 any（）。

A.permit all packets matching the first three octets of the source address to all destinations
B.permit all packets matching the last octet of the destination address and accept all source addresses
C.permit all packets from the third subnet of the network address to all destinations
D.permit all packets matching the host bits in the source address to all destinations
E.permit all packets to destinations matching the first three octets in the destination address