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單項選擇題

Which of the following protocols uses UDP to transfer files?（）

A.FTP
B.SFTP
C.SMTP
D.TFTP

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單項選擇題

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

單項選擇題

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

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