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()
A、procedure
B、function
C、route
D、flow
相关问题推荐
-
十六进制数CC所对应的八进制数为()。
A、314
B、630
C、1414
D、3030
-
设两个8位补码表示的数和相加时溢出(b7、a7为符号标志),则()。
A、b7与a7的"逻辑或"结果一定为1
B、b7与a7的"逻辑与"结果一定为0
C、b7与a7的"逻辑异或"结果一定为1
D、b7与a7的"逻辑异或"结果一定为0
-
For (1) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (2) for every packet sent. Instead,when a connection is established, a route from the(3) machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (4) . That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works.When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (5) telling which virtual circuit it belongs to.空白(2)处应选择()
A、processor
B、device
C、route
D、terminal
-
()不是使用光(激光)技术来存取数据的存储介质。
A、DVD
B、EEPROM
C、CD-ROM
D、CD-RW
-
衡量计算机的主要性能指标除了字长、存取周期、运算速度之外,通常还包括(1),因为其反映了(2)。空白(1)处应选择()
A、外部设备数量
B、计算机的制造成本
C、计算机的体积
D、主存储器容量大小