( )takes for a small packet to travel from client to server and then back to the client.
A. RDT
B. threshold
C. RTT
D. overhead
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The default mode of HTTP uses ( ).
A. non-persistent connection with pipelining
B. non-persistent connection without pipelining
C. persistent connection with pipelining
D. persistent connection without pipelining
In HTTP request messages, the request line has three fields, there are ( ).
A. the method field, the URL field and the HTTP version field
B. the method, the connection and URL field
C. the user-agent, the method and HTTP version field
D. the user-agent, the URL and the HTTP version field
In HTTP response message, if the status code is 404, it means ( ).
A. request succeeded and the information is returned in the response
B. requested object has been permanently moved
C. the requested HTTP protocol version is not supported by the server
D. the requested document does not exist on this server
( )is a network entity that satisfies HTTP requests on the behalf of an origin Web server.
A. proxy server
B. local server
C. DNS server
D. Web server
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