题目内容

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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HTTP has a mechanism that allows a cache to verify that its objects are up to date. The mechanism is( ).

A. persistent connections
B. cookies
C. Web Caching
D. conditional GET

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

A. The server leaves the TCP connection open after sending a response.
B. Each TCP connection is closed after the server sending one object.
C. There are two versions of persistent connection: without pipelining and with pipelining.
D. The default mode of HTTP uses persistent connection with pipelining.

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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

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( ).

HTTP has a mechanism that allows a cache to verify that its objects are up to date. The mechanism is( ).

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

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