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單項選擇題

A router that takes the workstations internal IP address and changes it to another IP address whenit sends the data outside of the network is an example of which of the following?（）

A.NAT
B.IDS
C.NMAP
D.DMZ

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單項選擇題

Which of the following protocols is commonly used for VoIP technology?（）

A.Telnet
B.SMTP
C.SIP
D.SNMP

單項選擇題

An administrator is experiencing availability issues on a Linux server. The administrator decides tocheck the server for an IP address conflict on the server. Which of the following commands should the administrator use?（）

A.traceroute
B.tracert
C.ifconfig
D.ipconfig

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