题目内容

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

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

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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.

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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

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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

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The widely used port number of web application is( ).

A. 25
B. 20
C. 80
D. 53

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

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

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

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( ).

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

The widely used port number of web application is( ).

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