单项选择题

Which of the following is used to serve as an emergency backup line to troubleshoot a broadbandconnection on many routers?（）

A.DSL
B.POTS
C.VDSL
D.Smart jack

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单项选择题

An administrator wants to test the network MTU. Which of the following commands allows differentsize packets to be sent?（）

A.netstat
B.traceroute
C.nbtstat
D.ping

单项选择题

An administrator suspects that an incorrect POTS line is carrying the DSL signal. Which of thefollowing will help diagnose this issue?（）

A. Multimeter
B. Toner probe
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单项选择题

An administrator receives reports from users in an office that their 802.11g wireless connectivity
has been problematic since the installation of the new wireless phone system.
At which of the following frequencies are both systems operating at to cause this issue?（）

A.2.4GHz
B.900MHz
C.1.1GHz
D.5GHz