init repo (dd74601f) · Commits · Sparkf / SUSTech_CS305B_Computer_Network_B

lab/lab1/report/1.md

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lab/lab1/report/CS305 Lab1 Report.md

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		# CS305B Lab1 Report

		11812418 樊青远 Fan Qingyuan

		## Q1

		> Use the ipconfig command to query the local ip, subnet mask, gateway, MAC address, and screenshot instructions.

		```bash
		>ifconfig
		en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
		options=400<CHANNEL_IO>
		ether 38:f9:d3:75:70:88
		inet6 fe80::472:9e7f:3642:1950%en0 prefixlen 64 secured scopeid 0xa
		inet 10.17.120.246 netmask 0xffff8000 broadcast 10.17.127.255
		inet6 2001:da8:201d:1109::f762 prefixlen 128 dynamic
		nd6 options=201<PERFORMNUD,DAD>
		media: autoselect
		status: active
		```

		![image-20210112233149752](image-20210112233149752.png)

		### Result

		\| Parameters \| Value \|
		\| ----------- \| ---------------------------- \|
		\| Local IP \| `10.17.120.246` \|
		\| Subnet mask \| 0xffff8000 (`255.255.128.0`) \|
		\| Gateway \| `10.17.127.255` \|
		\| MAC address \| `38:f9:d3:75:70:88` \|



		## Q2

		> Ping www.baidu.com and ping www.sustc.edu.cn, the screenshot gives a brief description of the echo message (whether the destination host is reachable, the communication duration, the TTL value)

		### ping www.baidu.com

		```bash
		>ping www.baidu.com
		PING www.a.shifen.com (14.215.177.38): 56 data bytes
		64 bytes from 14.215.177.38: icmp_seq=0 ttl=54 time=7.229 ms
		64 bytes from 14.215.177.38: icmp_seq=1 ttl=54 time=20.660 ms
		64 bytes from 14.215.177.38: icmp_seq=2 ttl=54 time=9.278 ms
		64 bytes from 14.215.177.38: icmp_seq=3 ttl=54 time=25.890 ms
		^C
		--- www.a.shifen.com ping statistics ---
		4 packets transmitted, 4 packets received, 0.0% packet loss
		round-trip min/avg/max/stddev = 7.229/15.764/25.890/7.769 ms
		```

		#### Screenshot

		![image-20210112234651895](image-20210112234651895.png)

		### ping www.sustc.edu.cn

		```bash
		>ping www.sustc.edu.cn
		PING www.sustc.edu.cn (172.18.8.244): 56 data bytes
		64 bytes from 172.18.8.244: icmp_seq=0 ttl=62 time=2.850 ms
		64 bytes from 172.18.8.244: icmp_seq=1 ttl=62 time=21.632 ms
		64 bytes from 172.18.8.244: icmp_seq=2 ttl=62 time=21.563 ms
		64 bytes from 172.18.8.244: icmp_seq=3 ttl=62 time=10.690 ms
		^C
		--- www.sustc.edu.cn ping statistics ---
		4 packets transmitted, 4 packets received, 0.0% packet loss
		round-trip min/avg/max/stddev = 2.850/14.184/21.632/7.915 ms
		```

		#### Screenshot

		![image-20210112234755159](image-20210112234755159.png)

		## Q3

		> Use the netstat command to check the traffic statistics on the local Ethernet card and take a screenshot

		![image-20210113001153688](image-20210113001153688.png)

		## Q4

		> Use the tracert command to access www.baidu.com and take a screenshot analysis to mark the total number of hops from the host to the destination host, whether there is any icmp packet loss, and the ip address of the server where www.baidu.com is located.

		![image-20210113000705782](image-20210113000705782.png)

		![image-20210114111104359](image-20210114111104359.png)

		The total number of hops from the host to the destination host is `12`. (The traceroute program always indicates that the packet was lost at the 12th hop, so the result is obtained from mtr)

		There are packet loss at the 6th, 6th, 10th of the hops from the traceroute result.

		The IP address of the baidu server is `14.215.177.38`.



		## Q5

		> In this lab class, list the commands that requires addition parameters to run. Use these commands and parameters (each command chooses 2 or 3 of them to experiment), take a screenshot and explain its function.

		### ping

		```bash
		usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize]
		[-g sweepminsize] [-h sweepincrsize] [-i wait]
		[-l preload] [-M mask \| time] [-m ttl] [-p pattern]
		[-S src_addr] [-s packetsize] [-t timeout][-W waittime]
		[-z tos] host
		ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait]
		[-l preload] [-M mask \| time] [-m ttl] [-p pattern] [-S src_addr]
		[-s packetsize] [-T ttl] [-t timeout] [-W waittime]
		[-z tos] mcast-group
		Apple specific options (to be specified before mcast-group or host like all options)
		-b boundif # bind the socket to the interface
		-k traffic_class # set traffic class socket option
		-K net_service_type # set traffic class socket options
		-apple-connect # call connect(2) in the socket
		-apple-time # display current time
		```

		`ping -c ` means the count the `ping ` command runs. e.g. `ping -c 10 1.2.4.8`

		![image-20210112235920182](image-20210112235920182.png)

		`ping -S` means specific the address that ICMP packet sends from. e.g. `ping -S 10.17.120.246 1.2.4.8 `

		![image-20210112235828415](image-20210112235828415.png)

		### Traceroute

		```bash
		Version 1.4a12+Darwin
		Usage: traceroute [-adDeFInrSvx] [-A as_server] [-f first_ttl] [-g gateway] [-i iface]
		[-M first_ttl] [-m max_ttl] [-p port] [-P proto] [-q nqueries] [-s src_addr]
		[-t tos] [-w waittime] [-z pausemsecs] host [packetlen]
		```

		`traceroute -i` means traceroute using the specific interface. e.g. `traceroute -i en0 1.0.0.1`

		![image-20210113000352011](image-20210113000352011.png)

		`traceroute -m` specific the max TTL (Time To Live) for the packet. e.g. `traceroute -m 3 1.0.0.1 `

		![image-20210113000341294](image-20210113000341294.png)

		### Nslookup

		`nslookup -query=AAAA www.cloudflare.com 172.18.1.92` means query the `AAAA` record of `www.cloudflare.com` from DNS server `172.18.1.92`.

		![image-20210113000814949](image-20210113000814949.png)

		`nslookup -query=TXT xn--g28h.hack.ustclug.org 172.18.1.92` means query the `AAAA` record of `xn--g28h.hack.ustclug.org` from DNS server `172.18.1.92`.

		![image-20210113001019382](image-20210113001019382.png)

		## Q6

		> Download and install WireShark: https://www.wireshark.org/

		![image-20210114105522655](image-20210114105522655.png)
		No newline at end of file

lab/lab1/report/CS305 Lab1 Report.tex

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		\author{}
		\date{}

		\begin{document}

		\hypertarget{header-n0}{%
		\section{CS305 Lab1 Report}\label{header-n0}}

		11812418 樊青远

		\hypertarget{header-n3}{%
		\subsection{Q1}\label{header-n3}}

		\begin{quote}
		Use the ipconfig command to query the local ip, subnet mask, gateway,
		MAC address, and screenshot instructions.
		\end{quote}

		\begin{verbatim}
		>ifconfig
		en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
		options=400<CHANNEL_IO>
		ether 38:f9:d3:75:70:88
		inet6 fe80::472:9e7f:3642:1950%en0 prefixlen 64 secured scopeid 0xa
		inet 10.17.120.246 netmask 0xffff8000 broadcast 10.17.127.255
		inet6 2001:da8:201d:1109::f762 prefixlen 128 dynamic
		nd6 options=201<PERFORMNUD,DAD>
		media: autoselect
		status: active
		\end{verbatim}

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210112233149752.png}
		\caption{}
		\end{figure}

		\hypertarget{header-n8}{%
		\subsubsection{Result}\label{header-n8}}

		\begin{longtable}[]{@{}ll@{}}
		\toprule
		Parameters & Value \\ \addlinespace
		\midrule
		\endhead
		Local IP & \texttt{10.17.120.246} \\ \addlinespace
		Subnet mask & 0xffff8000 (\texttt{255.255.128.0}) \\ \addlinespace
		Gateway & \texttt{10.17.127.255} \\ \addlinespace
		MAC address & \texttt{38:f9:d3:75:70:88} \\ \addlinespace
		\bottomrule
		\end{longtable}

		\hypertarget{header-n26}{%
		\subsection{Q2}\label{header-n26}}

		\begin{quote}
		Ping www.baidu.com and ping www.sustc.edu.cn, the screenshot gives a
		brief description of the echo message (whether the destination host is
		reachable, the communication duration, the TTL value)
		\end{quote}

		\hypertarget{header-n29}{%
		\subsubsection{ping www.baidu.com}\label{header-n29}}

		\begin{verbatim}
		>ping www.baidu.com
		PING www.a.shifen.com (14.215.177.38): 56 data bytes
		64 bytes from 14.215.177.38: icmp_seq=0 ttl=54 time=7.229 ms
		64 bytes from 14.215.177.38: icmp_seq=1 ttl=54 time=20.660 ms
		64 bytes from 14.215.177.38: icmp_seq=2 ttl=54 time=9.278 ms
		64 bytes from 14.215.177.38: icmp_seq=3 ttl=54 time=25.890 ms
		^C
		--- www.a.shifen.com ping statistics ---
		4 packets transmitted, 4 packets received, 0.0% packet loss
		round-trip min/avg/max/stddev = 7.229/15.764/25.890/7.769 ms
		\end{verbatim}

		\hypertarget{header-n31}{%
		\paragraph{Screenshot}\label{header-n31}}

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210112234651895.png}
		\caption{}
		\end{figure}

		\hypertarget{header-n33}{%
		\subsubsection{ping www.sustc.edu.cn}\label{header-n33}}

		\begin{verbatim}
		>ping www.sustc.edu.cn
		PING www.sustc.edu.cn (172.18.8.244): 56 data bytes
		64 bytes from 172.18.8.244: icmp_seq=0 ttl=62 time=2.850 ms
		64 bytes from 172.18.8.244: icmp_seq=1 ttl=62 time=21.632 ms
		64 bytes from 172.18.8.244: icmp_seq=2 ttl=62 time=21.563 ms
		64 bytes from 172.18.8.244: icmp_seq=3 ttl=62 time=10.690 ms
		^C
		--- www.sustc.edu.cn ping statistics ---
		4 packets transmitted, 4 packets received, 0.0% packet loss
		round-trip min/avg/max/stddev = 2.850/14.184/21.632/7.915 ms
		\end{verbatim}

		\hypertarget{header-n35}{%
		\paragraph{Screenshot}\label{header-n35}}

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210112234755159.png}
		\caption{}
		\end{figure}

		\hypertarget{header-n37}{%
		\subsection{Q3}\label{header-n37}}

		\begin{quote}
		Use the netstat command to check the traffic statistics on the local
		Ethernet card and take a screenshot
		\end{quote}

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210113001153688.png}
		\caption{}
		\end{figure}

		\hypertarget{header-n41}{%
		\subsection{Q4}\label{header-n41}}

		\begin{quote}
		Use the tracert command to access www.baidu.com and take a screenshot
		analysis to mark the total number of hops from the host to the
		destination host, whether there is any icmp packet loss, and the ip
		address of the server where www.baidu.com is located.
		\end{quote}

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210113000705782.png}
		\caption{}
		\end{figure}

		\hypertarget{header-n45}{%
		\subsection{Q5}\label{header-n45}}

		\begin{quote}
		In this lab class, list the commands that requires addition parameters
		to run. Use these commands and parameters (each command chooses 2 or 3
		of them to experiment), take a screensho
		\end{quote}

		\hypertarget{header-n48}{%
		\subsubsection{ping}\label{header-n48}}

		\begin{verbatim}
		usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize]
		[-g sweepminsize] [-h sweepincrsize] [-i wait]
		[-l preload] [-M mask \| time] [-m ttl] [-p pattern]
		[-S src_addr] [-s packetsize] [-t timeout][-W waittime]
		[-z tos] host
		ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait]
		[-l preload] [-M mask \| time] [-m ttl] [-p pattern] [-S src_addr]
		[-s packetsize] [-T ttl] [-t timeout] [-W waittime]
		[-z tos] mcast-group
		Apple specific options (to be specified before mcast-group or host like all options)
		-b boundif # bind the socket to the interface
		-k traffic_class # set traffic class socket option
		-K net_service_type # set traffic class socket options
		-apple-connect # call connect(2) in the socket
		-apple-time # display current time
		\end{verbatim}

		\texttt{ping\ -c} means the count the \texttt{ping} command runs. e.g.
		\texttt{ping\ -c\ 10\ 1.2.4.8}

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210112235920182.png}
		\caption{}
		\end{figure}

		\texttt{ping\ -S} means specific the address that ICMP packet sends
		from. e.g. \texttt{ping\ -S\ 10.17.120.246\ 1.2.4.8}

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210112235828415.png}
		\caption{}
		\end{figure}

		\hypertarget{header-n54}{%
		\subsubsection{Traceroute}\label{header-n54}}

		\begin{verbatim}
		Version 1.4a12+Darwin
		Usage: traceroute [-adDeFInrSvx] [-A as_server] [-f first_ttl] [-g gateway] [-i iface]
		[-M first_ttl] [-m max_ttl] [-p port] [-P proto] [-q nqueries] [-s src_addr]
		[-t tos] [-w waittime] [-z pausemsecs] host [packetlen]
		\end{verbatim}

		\texttt{traceroute\ -i} means traceroute using the specific interface.
		e.g. \texttt{traceroute\ -i\ en0\ 1.0.0.1}

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210113000352011.png}
		\caption{}
		\end{figure}

		\texttt{traceroute\ -m} specific the max TTL (Time To Live) for the
		packet. e.g. \texttt{traceroute\ -m\ 3\ 1.0.0.1}

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210113000341294.png}
		\caption{}
		\end{figure}

		\hypertarget{header-n60}{%
		\subsubsection{Nslookup}\label{header-n60}}

		\texttt{nslookup\ -query=AAAA\ www.cloudflare.com\ 172.18.1.92} means
		query the \texttt{AAAA} record of \texttt{www.cloudflare.com} from DNS
		server \texttt{172.18.1.92}.

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210113000814949.png}
		\caption{}
		\end{figure}

		\texttt{nslookup\ -query=TXT\ xn-\/-g28h.hack.ustclug.org\ 172.18.1.92}
		means query the \texttt{AAAA} record of
		\texttt{xn-\/-g28h.hack.ustclug.org} from DNS server
		\texttt{172.18.1.92}.

		\begin{figure}
		\centering
		\includegraphics{/Users/cyf/OneDrive - 南方科技大学/UG/Course/T6/CS305B计算机网络B/lab/lab1/report/image-20210113001019382.png}
		\caption{}
		\end{figure}

		\end{document}

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