（75）A．portsB．streamsC．packetsD．cells
（75）
A．ports
B．streams
C．packets
D．cells
相关考题：
● A transport layer protocol has several responsibilities. One is to create a process-to-process (program-to-program) communication; TCP uses port （71） to accomplish this. Another responsibility of a transport layer protocol is to create a （72） and error-control mechanism at the transport level. TCP uses a sliding （73） protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve （74） control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends （75） of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.（71）A. numbersB. connectionsC. diagramsD. resources（72）A. procedureB. functionC. routeD. flow（73）A. pathB. windowC. frameD. diagram（74）A. packetB. timeC. errorD. phase（75）A. portsB. streamsC. packetsD. cells
试题（75）Which of the following is not part of the change-management process of IT supervisor?（75）.（75）A．change analysesB．change evaluationC．change acquisitionD．change executing
27、一般适宜的田间土壤相对含水量，冬前为_____，越冬至返青期为_____，拔节至灌浆期则需提升到_____。A．70%~80%，65%~75%，70%~80%B．70%~80%，75%~80%，70%~80%C．75%~85%，75%~80%，65%~75%D．75%~85%，65%~75%，65%~75%
在闭路监控系统中，如果采用SYV75-5-1的同轴电缆，75表示（）意思。A．75伏B．75安培C．75欧姆D．75米