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TCP/IP is a communication protocol, which provides many different networking services. The TCP/IP Internet protocol suite is formed from two standards: the TCP （Transmission Control Protocol） and the IP（Internet Protocol）.

（72） means it is on the transport layer.

A.ISO

B.IP

C.OSI

D.TCP

（71）A．network interface layer, internet layer, transport layer and application layer

B．internet layer, network interface layer, transport layer and application layer

C．network interface layer, transport layer, network interface layer and application layer

D．application layer, transport layer, internet layer and network interface layer

A.network interface layer, internet layer, transport layer and application layer

B.internet layer, network interface layer, transport layer and application layer

C.network interface layer, transport layer, network interface layer and application layer

D.application layer, transport layer, internet layer and network interface layer

A、IP protocol

B、HTTP protocol

C、TCP Protocol

D、Ftp Protocol

A. The layer 3 protocol on which other protocols like TCP and UDP communicate.

B. Enables the IPSec protocol on internal workstations.

C. Packet-based detection and prevention of network attacks.

D. Single mode IP communication for a fiber line between remote sites.

TCP/IP(Transmission Control Protoco/Internet Protocol)指传输控制协议。()

A.Synchronizes password exchanges for call setup

B.Eliminates the need for physical cabling in a TCP/IP network

C.Enables two-way voice transmission over a packet-switched TCP/IP network

D.Creates an encrypted tunnel for voice through a Transmission Control Protocol (TCP)/IP network