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（2）处应选择（）

[单选题]患者，男，感冒后出现恶风发热，汗出，头痛，鼻鸣干呕，苔白不渴，脉浮缓，诊断为外感风寒，营卫不和证，处方桂枝合剂。下面对上述病证所选成药的叙述错误的是（）

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[单选题]治疗下焦湿热之尿频淋漓，宜选用的方剂是（　　）。

[问答题]什么是控制图？

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[单选题]Which of the following is a connectionless transport layer protocol？（）

[单选题]Which of the following is a connection oriented transport layer protocol?（）

[单选题]A transport layer protocol has several responsibilities, One is to create a proc...

[单选题]Which of the following is a connection oriented transport layer protocol？ （）

[单选题]A transport layer protocol has several responsibilities, One is to create a proc...

[单选题]A transport layer protocol has several responsibilities, One is to create a proc...

[单选题]A transport layer protocol has several responsibilities, One is to create a proc...

[单选题]A transport layer protocol has several responsibilities, One is to create a proc...

[多选题]Which of the protocols below use TCP at the transport layer?（）

[单选题]The TCP protocolis a （）layer protocol.