单项选择题

What speeds must be disabled in a mixed 802.11b/g WLAN to allow only 802.11g clients to connect?（）

A.6，9，12，18
B.1，2，5.5，6
C.5.5，6，9，11
D.1，2，5.5，11

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A.learning
B.listening
C.discarding
D.forwarding

The following configuration line was added to router R1...

单项选择题

The following configuration line was added to router R1
Access-list 101 permit ip 10.25.30.00.0.0.255 any
What is the effect of this access list configuration？（）

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

GivenanIPaddress172.16.28.252withasubnetmaskof255.255.2...

单项选择题Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0， what is the correct networkaddres？（）

A.172.16.16.0
B.176.24.0.0
C.172.16.0.0
D.172.16.28.0

CCNA系列认证综合练习

What speeds must be disabled in a mixed 802.11b/g WLAN to allow only 802.11g clients to connect?（）