E．ach machine supporting TCP has a TCP transport entity, either a library procedure, a user process, or part of the kernel. In all case, it manages TCP streams and (71) to the IP layer. A TCP (72) accepts user data streams from local process, breaks them into pieces not exceeding 64KB, and sends each piece as a separate IP (73). When datagrams containing TCP data arrive at a machine, they are given to the TCP entity, which reconstructs the original byte streams.The IP layer gives no guarantee that datagrams will be delivered properly, so it is up to TCP to time out and (74) them as need be. Datagmms do arrive may well do so in the wrong order, it is also up to TCP to (75) them into messages in the proper sequence.

A．calls

B．interfaces

C．links

D．produces

[单选题] Each machine supporting TCP has a TCP transport entity, either a library procedure, a user process, or part of the kernel. In all case, it manages TCP streams and （71） to the IP layer. A TCP （72） accepts user data streams from local process, breaks

[单选题]In recent years，TCP／IP has also begun to be used by telephone companies to provide faster,cheaper telephone (74) .(74) A．transmittingB．transmitedC．transfersD．transmissions

[单选题]Each machine in the internet is assigned a unique network address,called（）,that is used to identify the machine for communication purposesA .MAC addressB .IP addressC .host addressD .domain name address

[单选题]The machine has stopped rotating because the bearing _____ the shaft.A．seizedB．cloggedC．meltedD．inserted

[单选题]The machine has stopped rotating because the bearing （） the shaft.A . seizedB . cloggedC . meltedD . inserted

[单选题]In recent years，TCP/IP has also begun to be used by telephone companies to

[单选题]TCP/IP协议中TCP协议负责（）A . 音频传输B . 数据传输的可靠性C . 视频传输D . 文本传输

[单选题]TCP/IP协议中TCP协议负责______.A.数据传输B.数据传输的可靠性C.接入互联网D.以上都不是

[单选题]In the following essay, each blank has four choices.Choose the best answer and write down on the answer sheet.C．ommunicating via Email is by far the most common Internet activity.You can (71) with anyone in the world who has an Internet address or E

[单选题]B．ritain has the highest _____ of road traffic in the world—over 60 cars for every mile of road.[A] density[B] intensity[C] popularity[D] prosperity