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A transport layer protocol has several responsibilities, One is to create a process-to-process (program-to-program) communication; TCP uses port (1) to accomplish this. Another responsibility of a transport layer protocol is to create a (2) and error-control mechanism at the transport level. TCP uses a sliding (3) protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve (4) control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends (5) 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. 空白(5)处应选择()
平硐开拓方法主要分为()。
治疗洋地黄中毒所致的缓慢型心律失常有误的是( )
矿物的条痕颜色可以突出自色、减弱他色、消除假色,因而是鉴定矿物的重要依据之一。
SS9G型电力机车车体的主要承载结构由底架、()、台架、侧构和大顶盖组成。底架位于车体下部,是车体的基础,也是主要承载结构。()是焊接在底架结构上的设备安装骨架,用于车内设备安装和管线布置的基础。
广告调查必须遵循的三项基本原则是()、()、()原则。
两台变压器并联运行时短路电压小者通过的电流()
混合型外阴色素减退疾病()
根据货币供给机制,货币供应量等于基础货币与货币乘数的( )。
男,45岁,身高1.75m,体重70kg,每日吸烟20支。父亲患有冠心病。以下建议中不正确的是()