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
相关考题
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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 -
单项选择题
Which IPV6 routing protocol uses multicast group FF02::9 to send updates?（）
A.RIPng
B.OSPFv3
C.static
D.IS-ISfor IPv6 -
单项选择题
根据下图，R1能通告给R2的最有效的汇总是？（）
A.172.1.0.0/22
B.172.1.0.0/21
C.172.1.4.0/22
D.172.1.4.0/24 172.1.5.0/24 172.1.6.0/24 172.1.7.0/24
E.172.1.4.0/25 172.1.4.128/25 172.1.5.0/24 172.1.6.0/24 172.1.7.0/24
