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.numbers
B.connections
C.diagrams
D.resources
第1题:
Acknowledgements, sequencing, and flow control are functions that are handled by which layer of the OSI model?
A. Layer 5
B. Layer 4
C. Layer 7
D. Layer 6
E. Layer 3
F. Layer 2
G. Layer 1
第2题:
OSI参考模型有哪些层,按顺序()。
A.Application、session、transport、network、physical、physical、datalink
B.Application、presentation、session、network、transport、datalink,physical
C.Application、presentation、session、transport、network、datalink、physical
D.Application、session、transport、physical、network、physical、datalink
第3题:
第4题:
A.@do
B.@for
C.@while
D.@dowhile
第5题:
A. Layer 2
B. Layer 3
C. Layer 4
D. Layer 5
E. Layer 6
F. Layer 7
第6题: