单项选择题
Wireless components must work together for interoperability and performance. Which standard has specifications that are 2.4 GHz， 54 Mb/s， and a range of 150 feet？（）
A. 802.11n
B. 802.11b
C. 802.11a
D. 802.11g
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WhatthreeelementsareincludedwithCiscoSmallBusinessProService？（）
A. five-year subscription terms
B. next business day advanced hardware replacement
C. access to the Cisco Small Business Support Center
D. Cisco SMARTnet
E. software upgrades and updates
F. access to the Cisco Small Business University -
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BridgesandswitchesareLayer2devicesthatprovidethesamebasicfunctionalitybutthatalsohavesomedifferences.Whichtwotraitsapplytoswitchesonly？（）
A. supports Layer 2 VLANs
B. segment LANs
C. are faster because forwarding decisions are made on hardware
D. typically have fewer ports because forwarding decisions are made in software
E. flood frames out all ports -
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InCiscoNetworkAttachedStoragesolutions，whataretwocommonhigh-availabilityfeaturesforsmallbusiness？（）
A. XFS file system
B. support for RAID 4
C. 10 Gigabit Ethernet connections
D. lifetime warranty
E. SMART disk support
