题目内容
(请给出正确答案)
[单选题]
() provides reliable, full-duplex connections and reliable service by ensuring that
A.TCP
B.ARP
C.UDP
D.IP
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A.TCP
B.ARP
C.UDP
D.IP
第1题
TCP/IP application layer protocols include the following except ( ).
A、HTTP
B、FTP
C、UDP
D、Telnet
第2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3题
TCP/IP refers to a suite of ( ).
A、system
B、control units
C、application programs
D、data communication protocols
第4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
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