CSCI 4061 Lab13: HTTP Client

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                            LAB 13 QUESTIONS
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- Name: (FILL THIS in)
- NetID: (THE kauf0095 IN kauf0095@umn.edu)

Answer the questions below according to the lab specification. Write
your answers directly in this text file and submit it to complete Lab01.


Problem 1 `http_get.c'
======================

  Examine the source code for `http_get.c' and use it to contact a few
  hosts and files such as those shown at the top of the source.  Answer
  the following questions.


A
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  - What is the full name of the that protocol is being employed?
  - Which port does the server listen on in this protocol?


B
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  Describe which system calls are used to find an internet address,
  create a socket, and connect the socket to the found address.


C
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  In this protocol, which entity, SERVER or CLIENT, sends data first?
  (Though you don't have access to a server code, this should be obvious
  from the structure of the client code).


D
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  Does the protocol work in plain text (human readable) or in binary
  format (harder for humans to read directly).  Show examples/evidence
  to support your answer.


E
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  Many protocols use /headers/ which are meant to convey information
  between the communication programs about the state of the
  communication but are NOT data that a program user would be interested
  in.  Show a few headers which appear in communication and describe
  what you infer their meaning to be.


F
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  Attempting to hunt down the actual homepage for the UMN via
  ,----
  | ./http_get twin-cities.umn.edu /
  `----
  will produce an interesting conundrum: the address to be contacted to
  retrieve the file uses a DIFFERENT PROTOCOL.

  Identify this other protocol, the port its servers use, and why it
  would be much more complex to write a client to use it.


Problem 2 `http_get_ssl.c'
==========================

  Examine the source code for `http_get_ssl.c' and use it to contact
  some of the same hosts that you did with `http_get.c'.  Answer the
  following questions.


A
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  Determine what additional measures `http_get_ssl.c' employs to use a
  secure protocol for communication with a server.  Show the code block
  that accomplishes this (though no explanation is required).


B
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  Aside from the code block that is added above to enable secure
  communication, are there any other large changes between `http_get.c'
  and `http_get_ssl.c' to implement the secure communication version?