计算机网络英文题库(附答案)chapter3

Chapter 3 Transport Layer

1. A transport-layer protocol provides for logical communication between ____. A Application processes B Hosts C Routers D End systems

2. Transport-layer protocols run in ____. A Servers B Clients C Routers D End systems

3. In transport layer, the send side breaks application messages into ____, passes to network layer. A Frames B Segments C Data-grams D bit streams

4. Services provided by transport layer include ____. A HTTP and FTP B TCP and IP C TCP and UDP D SMTP

5. Which of the following services is not provided by TCP? A Delay guarantees and bandwidth guarantees B Reliable data transfers and flow controls C Congestion controls D In-order data transfers

6. These two minimal transport-layer services----____ and ____----are the only two services that UDP provides!

A process-to-process data delivery, error checking B congestion control, reliable data transfer C flow control, congestion control D In-order data transfer, error checking 7. Port number’s scope is ____ to ____. A 0, 1023 B 0, 65535 C 0, 127 D 0,255

8. The port numbers ranging from ____to ____ are called well-known port number and are restricted. A 0, 1023 B 0, 65535 C 0, 127

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