A.HTTP
B.FTP
C.UDP
D.Telnet
第1题
The Address Resolution Protocol(ARP) is employed at ( ).
A、Network Interface Layer
B、Internetwork Layer
C、Host-to-Host Transport Layer
D、Application Layer
第2题
TCP/IP refers to a suite of ( ).
A、system
B、control units
C、application programs
D、data communication protocols
第3题
Benefits of using VPNs include the following except ( ).
A、cost savings
B、extending connectivity to telecommuters,mobile users and remote offices
C、low security
D、high reliability
第4题
Virtual Private Networks(VPN) are networks deployed on a ( ) network infrastructure.
A、public
B、private
C、local area
D、wide area
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