超星 - 自测题 ch2

单选题

In the following four descriptions, which one is correct?( )

A. In C/S architecture, clients communicate with each other directly.
B. In C/S architecture, client has a fixed well-known address.
C. In P2P architecture, peers communicate with each other directly.
D. In P2P architecture, peer has a fixed well-known address.

查看答案

单选题

In the context of a communication session between a pair of process, the process that initiates the communication is labeled as the( ) , the process that waits to be contacted to begin the session is labeled as the( ).

A. client process, server process
B. sending process, receiving process
C. input process, output process
D. communicating process, connecting process

查看答案

单选题

A socket is the interface between ( )within a host.

A. the network layer and the link layer
B. the link layer and the physical layer
C. the application layer and the transport layer
D. the transport layer and the network layer

查看答案

单选题

In the following applications, which one is a loss-tolerant application?( )

A. E-mail
B. file transfer
C. instant messaging
D. real-time audio

查看答案

单选题

In the following applications, which one is a bandwidth-sensitive application?( )

A. E-mail
B. web application
C. real-time audio
D. file transfer

查看答案

单选题

The service of TCP can't guarantee ( ).

A. delivery of all data without error
B. delivery of all data in the proper order
C. the rate of delivery
D. congestion control

查看答案

单选题

In the following applications, which one uses UDP?( )

A. E-mail
B. web application
C. file transfer
DNS

查看答案

单选题

In the following descriptions about HTTP, which one is not correct?( )

A. HTTP uses UDP as its underlying transport protocol.
B. HTTP uses TCP as its underlying transport protocol.
C. HTTP is a stateless protocol.
D. HTTP is client-server architecture.

查看答案

单选题

Suppose a web page consists of a base HTML file, 5 JEPG images and a java applet, and also suppose HTTP uses persistent connection without pipelining, the total response time is( ).

A. 2 RTT
B. 8 RTT
C. 12 RTT
D. 14 RTT

查看答案

单选题

In HTTP response message, if the requested HTTP protocol version is not supported, the status code is( ).

A. 200
B. 301
C. 400
D. 505

查看答案