Answer the following questions: >Is the response message using HTTP 1.0 or HTTP

Question

Answer the following questions:

>Is the response message using HTTP 1.0 or HTTP 1.1? Explain.

>Was the server able to send the document successfully? Explain

>At what date and time was this response sent?

>When was the file last modified on the server?

>How many bytes are there in the document being returned by the server?

> What is the default mode of connection for HTTP protocol? Is the connection in the reply persistent or nonpersistent? Explain.

>What is the type of file being sent by the server in response?

>Does the response message use separate keep-alive messages?

>What is the name of the server and its version ? List the advantages of the server used.

>What is the timeout value

Consider the figure below, where the server is sending a HTTP RESPONSE message back the client http GET http reply Internet host, running a web browser gaia.cs.umass.edu Web server Suppose the server-to-client HTTP RESPONSE message is the following 200 HTTP/1.1 Date: Server: Last-Modified: ETag:17dc6-a5c-bf716880 Content-Length: Keep-Alive: Connection: Content-type: image/html OK 18 +0000 +0000 3671 Fri 2017 13:47:55 Aug Apache/2.2.3 (CentOS) Fri, 18 Aug 2017 13:48:35 timeout-26, max 86 Keep-alive

Explanation / Answer

Answer)

The response message is using HTTP 1.1 which addresses the issue of proxies,caching, virtual hosts, connections etc.

The server was able to send the document successfully as 200 is displayed in the first line which is the status line which says that the request is fulfilled.

The response was sent on 18 th Aug 13:47:55 (Time) as mentioned in the date section.

The file was last modified on 18 th Aug 13:48:35 as mentioned under last modification section.

3671 bytes in the content section is the content length.

HTTP/1.1 uses keep-alive connection as default connection mode for HTTP Protocol. And also the connection in the above example is persistent as we use the command "Connection: Keep Alive".

The type of file being sent by the server in the response is of a image/html format as mentioned in the last line.

By default HTTP 1.1 uses the keep alive command hence a separate keep alive message is not needed.

The name of the server and version is HTTP1.1 and the advantage of using this server addresses the issue of proxies,caching, virtual hosts, connections etc and also uses the keep alive as default which in turn makes the connection persistent so that another request can be sent the same connection which results in network efficiency.

The time out value is 26 as mentioned in the Time Out section.

Hope this helps :)

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