Start wireshark lab
This commit is contained in:
parent
4a8459bb21
commit
5cbd58d190
2 changed files with 141 additions and 0 deletions
14
network-protocols/Makefile
Normal file
14
network-protocols/Makefile
Normal file
|
|
@ -0,0 +1,14 @@
|
|||
filename=$(shell basename $(shell pwd))
|
||||
timestamp=$(shell date +%Y-%m-%d_%H:%M)
|
||||
|
||||
all: wireshark-lab
|
||||
|
||||
wireshark-lab: wireshark-lab_20211005.tex
|
||||
@latexmk -pdf wireshark-lab_20211005.tex
|
||||
@if ! cmp --silent build/wireshark-lab_20211005.pdf wireshark-lab_20211005.pdf; then \
|
||||
cp build/wireshark-lab_20211005.pdf wireshark-lab_20211005.pdf; \
|
||||
echo "Updated"; \
|
||||
fi
|
||||
|
||||
clean:
|
||||
@rm -rf build 2>/dev/null
|
||||
127
network-protocols/wireshark-lab_20211005.tex
Normal file
127
network-protocols/wireshark-lab_20211005.tex
Normal file
|
|
@ -0,0 +1,127 @@
|
|||
\documentclass[a4paper,french,12pt]{article}
|
||||
|
||||
\title{Networks and Protocols --- Wireshark Lab}
|
||||
\author{Tunui Franken}
|
||||
|
||||
\usepackage{../cours}
|
||||
|
||||
\begin{document}
|
||||
|
||||
\maketitle
|
||||
\clearpage
|
||||
|
||||
\section{HTTP}
|
||||
|
||||
\subsection{Basic HTTP GET/response interaction}
|
||||
|
||||
\begin{enumerate}
|
||||
|
||||
\item Is your browser running HTTP version 1.0 or 1.1?
|
||||
What version of HTTP is the server running?
|
||||
|
||||
The client and the server are both running HTTP version 1.1.
|
||||
(client: trace n°10, server: trace n°12)
|
||||
|
||||
\item What languages (if any) does your browser indicate that it cas accept to the server?
|
||||
|
||||
The \texttt{Accept-Language} header indicates that the browser accepts \texttt{en-us}.
|
||||
|
||||
\item What is the IP address of your computer?
|
||||
Of the gaia.cs.umass.edu server?
|
||||
|
||||
The client computer has private address 192.168.1.102.
|
||||
The server has address 128.119.245.12.
|
||||
|
||||
\item What is the status code returned from the server to your browser?
|
||||
|
||||
The GET ``ok'' response indicates a 200 status code.
|
||||
|
||||
\item When was the HTML file that you are retrieving last modified at the server?
|
||||
|
||||
The \texttt{Last-Modified} header indicates \texttt{Tue, 23 Sep 2003 05:29:00 GMT}.
|
||||
|
||||
\item How many bytes of content are being returned to your browser?
|
||||
|
||||
The server has returned 73 bytes.
|
||||
|
||||
\end{enumerate}
|
||||
|
||||
\subsection{HTTP conditional GET/response interaction}
|
||||
|
||||
\begin{enumerate}\setcounter{enumi}{6}
|
||||
|
||||
\item Inspect the contents of the first HTTP GET request from your browser to the server.
|
||||
Do you see an ``IF-MODIFIED-SINCE'' line in the HTTP GET\@?
|
||||
|
||||
The line is not present.
|
||||
|
||||
\item Inspect the contents of the server response.
|
||||
Did the server explicitly return the contents of the file?
|
||||
How can you tell?
|
||||
|
||||
The server returned a 200 return status code.
|
||||
If it hadn't explicitly returned the contents of the file, it would have returned a 304 status code.
|
||||
|
||||
\item Now inspect the contents of the second HTTP GET request from your browser to the server.
|
||||
Do you see an ``IF-MODIFIED-SINCE'' line in the HTTP GET\@?
|
||||
If so, what information follows the ``IF-MODIFIED-SINCE'' header?
|
||||
|
||||
This time, the header is present in the browser's request.
|
||||
The next header is ``IF-NONE-MATCH''.
|
||||
|
||||
\item What is the HTTP status code and phrase returned from the server in response to this second HTTP GET\@?
|
||||
Did the server explicitly return the contents of the file?
|
||||
|
||||
This time the response has a 304 return status code, with a ``Not Modified'' message.
|
||||
The server does not send the file contents, because the browser has already cached it.
|
||||
|
||||
\end{enumerate}
|
||||
|
||||
\subsection{Retrieving long documents}
|
||||
|
||||
\begin{enumerate}\setcounter{enumi}{10}
|
||||
|
||||
\item How many HTTP GET request messages did your browser send?
|
||||
Which packet number in the trace contains the GET message for the Bill of Rights?
|
||||
|
||||
The browser has sent one GET request.
|
||||
This request has packet number 8.
|
||||
|
||||
\item Which packet number in the trace contains the status code and phrase associated with the response to the HTTP GET response?
|
||||
|
||||
The packet n°14 contains the status code and phrase.
|
||||
|
||||
\item What is the status code and phrase in the response?
|
||||
|
||||
The status code returned by the server is 200, associated with the ``OK'' phrase.
|
||||
|
||||
\item How many data-containing TCP segments were needed to carry the single HTTP response and the the text of the Bill of Rights?
|
||||
|
||||
The HTTP response was broken down into 3 separate TCP segments containing data.
|
||||
Each segment being 1460 bytes long, they add up to 4272.
|
||||
|
||||
\end{enumerate}
|
||||
|
||||
\subsection{HTML Documents with Embedded Objects}
|
||||
|
||||
\begin{enumerate}\setcounter{enumi}{14}
|
||||
|
||||
\item How many HTTP GET request messages did your browser send?
|
||||
To which Internet addesses were these GET requests sent?
|
||||
|
||||
The browser has sent 3 GET request messages to 3 different IP addresses~:
|
||||
\texttt{128.119.245.12}, \texttt{165.193.123.218} and \texttt{134.241.6.82}.
|
||||
|
||||
\item Can you tell whether your browser downloaded the two images serially, or whether they were downloaded from the two web sites in parallel?
|
||||
Explain.
|
||||
|
||||
The \texttt{Time} column indicates that the GET requests were made separately.
|
||||
The TCP data indicates the the Acknowledgement numbers are also independant (their relative value is 1).
|
||||
|
||||
\end{enumerate}
|
||||
|
||||
\subsection{HTTP Authentication}
|
||||
|
||||
\section{DNS}
|
||||
|
||||
\end{document}
|
||||
Loading…
Reference in a new issue