is the 4th layer of the OSI reference model responsible for reliable network communication between end nodes.A.Data link layerB.Session layerC.Transport layerD.Application layer

is the 4th layer of the OSI reference model responsible for reliable network communication between end nodes.

A.Data link layer

B.Session layer

C.Transport layer

D.Application layer


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OSI参考模型有哪些层,按顺序()。A.Application、session、transport、network、physical、physical、datalinkB.Application、presentation、session、network、transport、datalink,physicalC.Application、presentation、session、transport、network、datalink、physicalD.Application、session、transport、physical、network、physical、datalink

The use of network( ),systems that effectively isolate an organizations internal network structure from an( )network, such as the INTERNET is becoming increasingly popular. These firewall systems typically act as application-layer( )between networks, usually offering controlled TELNET, FTP, and SMTP access. With the emergence of more sophisticated( )layer protocols designed to facilitate global information discovery , there exists a need to provide a general ( )for these protocols to transparently and securely traverse a firewall.A.safeguardsB.firewallsC.routersD.switches A.exteriorB.InternalC.centreD.middle A.hostsB.routersC.gatewaysD.officesA.networkB.sessionC.transmissionD.application A.frameworkB.internetworkC.computerD.application

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work(请作答此空),systems that effectively isolate an organization's internal network structure from an ( ) network, such as the INTERNET is becoming increasingly popular. These firewall systems typically act as application-layer( )between networks, usually offering controlled TELNET, FTP, and SMTP access. With the emergence of more sophisticated( )layer protocols designed to facilitate global information discovery , there exists a need to provide a general ( )for these protocols to transparently and securely traverse a firewall.A.safeguardsB.firewallsC.routersD.switches

work( ),systems that effectively isolate an organization's internal network structure from an ( ) network, such as the INTERNET is becoming increasingly popular. These firewall systems typically act as application-layer( )between networks, usually offering controlled TELNET, FTP, and SMTP access. With the emergence of more sophisticated( )layer protocols designed to facilitate global information discovery , there exists a need to provide a general (请作答此空)for these protocols to transparently and securely traverse a firewall.A.frameworkB.internetworkC.computerD.Application

The Hypertext Transfer Protocol , the Web's (请作答此空) protocol , is at the heart of the Web. HTTP is implemented in two programs : a ( ) program and a server program . The client program and server program executing on different end systems , talk to each other by ( ) HTTP messages . HTTP defines how Web clients request Web pages from servers and how servers transfer web pages to clients . when a user ( ) a web page , the browser sends http request messages for the objects in the page to the server . The server ( ) the requests and responds with http response messages that contain the objects .A.transport-layerB.application-layerC.network-layerD.link-layer

work( ),systems that effectively isolate an organization's internal network structure from an (请作答此空) network, such as the INTERNET is becoming increasingly popular. These firewall systems typically act as application-layer( )between networks, usually offering controlled TELNET, FTP, and SMTP access. With the emergence of more sophisticated( )layer protocols designed to facilitate global information discovery , there exists a need to provide a general ( )for these protocols to transparently and securely traverse a firewall.A.exteriorB.InternalC.centerD.middle

work( ),systems that effectively isolate an organization's internal network structure from an ( ) network, such as the INTERNET is becoming increasingly popular. These firewall systems typically act as application-layer(请作答此空)between networks, usually offering controlled TELNET, FTP, and SMTP access. With the emergence of more sophisticated( )layer protocols designed to facilitate global information discovery , there exists a need to provide a general ( )for these protocols to transparently and securely traverse a firewall.A.hostsB.routersC.gatewaysD.offices

work( ),systems that effectively isolate an organization's internal network structure from an ( ) network, such as the INTERNET is becoming increasingly popular. These firewall systems typically act as application-layer( )between networks, usually offering controlled TELNET, FTP, and SMTP access. With the emergence of more sophisticated(请作答此空)layer protocols designed to facilitate global information discovery , there exists a need to provide a general ( )for these protocols to transparently and securely traverse a firewall.A.networkB.sessionC.transmissionD.application

The Hypertext Transfer Protocol,the Web's(请作答此空)protocol,is at the heart of the Web.HTTP is implemented in two programs:a( )program and a server program.The client program and server program executing on different end systems,talk to each other by( )HTTP messages.HTTP defines how Web clients request Web pages from servers and how servers transfer web pages to clients.when a user( )a web page,the browser sends http request messages for the objects in the page to the server.The server( )the requests and responds with http response messages that contain the objects.A.transport-layerB.application-layerC.network-layerD.link-layer