单项选择题
A 100 pair cable is typically used to connect：（）
A.telephony distribution.
B.businesses with more than 75 computers.
C.security cameras.
D.computer labs with more than 20 computers.
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WhichofthefollowingisthemaximumtransmissionspeedofCAT5e？（）
A.10Mbps
B.100Mbps
C.1000Mbps
D.10000Mbps -
单项选择题
Whichofthefollowingroutingprotocolsisalinkstateandusesabackbonecalledarea0？（）
A.OSPF
B.EIGRP
C.BGP
D.IS-IS -
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Whichofthefollowingcablestandardshasamaximumeffectiverangeof25meters（82feet）？（）
A.1000Base-CX
B.1000Base-T
C.1000Base-LX
D.1000Base-SX
