单项选择题
Which of the following logical network topologies is used to provide a secure connection acrossthe Internet?（）
A.VLAN
B.Peer to Peer
C.VTP
D.VPN
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Which of the following technologies facilitates the conversion of internal private IP addressing toexternal public IP addressing?（）
A.DHCP
B.TCP/IP
C.NAT
D.SNMP -
单项选择题
Which of the following processes translates a private IP address for a public IP address?（）
A.NAT
B.DNS
C.DHCP
D.PAT -
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Which of the following holds multiple connections and is usually maintained by the telephone company?（）
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C.MDF
D.110 block
