2022-01-10 16:29:23 +00:00
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\documentclass[12pt,a4paper]{article}
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\usepackage[spanish]{babel}
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\usepackage{hyperref}
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\usepackage{graphicx}
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\usepackage{subcaption}
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\usepackage{tikz}
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\usetikzlibrary{shapes,positioning,calc}
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\title{Tema V Ejercicio I: DNS}
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\author{Nicolás A. Ortega Froysa}
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\begin{document}
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\maketitle
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\pagebreak
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\tableofcontents
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\pagebreak
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\section{Hoja De Control Del Documento}
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\begin{table}[h!]
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\centering
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\caption{Documento/Archivo}
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\label{tab:document}
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\begin{tabular}{|l|c|l|c|}
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\hline
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{\bf Fecha Última Modificación} & \the\day/\the\month/\the\year &
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{\bf Versión/Revisión} & v01r02 \\ \hline
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{\bf Fecha Creación} & 5/1/2022 & \hfill & \hfill \\ \hline
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{\bf Fecha Finalización} & \the\day/\the\month/\the\year & \hfill &
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\hfill \\ \hline
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\end{tabular}
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\end{table}
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\begin{table}[h!]
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\centering
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\caption{Registro De Cambios}
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\label{tab:registro-cambios}
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\begin{tabular}{|c|c|c|}
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\hline
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{\bf Versión/Revisión} & {\bf Página(s)} & {\bf Descripción} \\
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\hline
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v01r01 & Todas & Creación y elaboración del documento. \\ \hline
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v01r02 & 5 & Completar apartado (c). \\ \hline
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\end{tabular}
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\end{table}
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\begin{table}[h!]
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\centering
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\caption{Autores Del Documento}
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\label{tab:autores}
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\begin{tabular}{|c|c|}
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\hline
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{\bf Apellidos, Nombre} & {\bf Curso} \\ \hline
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Ortega Froysa, Nicolás Andrés & 1 \\ \hline
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\end{tabular}
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\end{table}
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\begin{table}[h!]
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\centering
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\begin{tabular}{|p{4cm}|p{4cm}|p{4cm}|}
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\hline
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{\bf Preparado} & {\bf Revisado} & {\bf Aprobado} \\ \hline
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Ortega Froysa, Nicolás Andrés & \hfill & \hfill \\ \hline
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\end{tabular}
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\end{table}
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\pagebreak
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\begin{table}[h!]
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\centering
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\begin{tabular}{|c|c|c|}
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\hline
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{\bf Nombre Dominio} & {\bf Protocolo} & {\bf Dirección IP} \\ \hline
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www.cv-cep.ceuandalucia.es & HTTP & 150.214.115.75 \\ \hline
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mail.cv-cep.ceuandalucia.es & SMTP & 150.214.100.43 \\ \hline
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dns\_info.cv-cep.ceuandalucia.es & DNS & 150.214.7.101 \\ \hline
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dns1.finantial.com & DNS & 138.17.117.4 \\ \hline
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www.finantial.com & HTTP & 138.17.117.15 \\ \hline
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ftp.finantial.com & FTP & 138.17.117.7 \\ \hline
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pppserver.sports.com & Streaming & 146.10.158.4 \\ \hline
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dns\_sports.sports.com & DNS & 146.10.158.16 \\ \hline
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servidor\_dns1.es & DNS & 100.100.102.100 \\ \hline
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dns\_server1.com & DNS & 99.99.99.99 \\ \hline
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onix.ceuandalucia.es & DNS & 150.214.186.69 \\ \hline
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\end{tabular}
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\caption{Tabla de nombres de dominio.}
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\end{table}
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\noindent
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{\bf a. Represente el espacio de nombres de dominio en una estructura
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arborescente.}
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\hfill
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\begin{tikzpicture}[sibling distance=12em,
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every node/.style={draw,align=center},
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root/.style={fill=green!20},
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tld/.style={fill=blue!20},
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branch/.style={shape=ellipse},
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leaf/.style={shape=rectangle,fill=yellow!20},
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level 2/.append style={sibling distance=8em},
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level 3/.append style={sibling distance=4em}]
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\node[branch,root] {•}
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child { node[branch,tld] {com}
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child { node[branch] {finantial}
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child { node[leaf] {www} }
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child { node[leaf] {ftp} }
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}
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child { node[branch] {sports}
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child { node[leaf] {pppserver} }
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}
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}
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child { node[branch,tld] {es}
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child { node[branch] {ceuandalucia}
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child { node[branch] {cv-cep}
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child { node[leaf] {mail} }
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child { node[leaf] {www} }
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}
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}
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};
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\end{tikzpicture}
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\hfill
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\noindent
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{\bf b. ¿Cuántas zonas DNS existen? Si hay servidores DNS, señale sus tipos y
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sus direcciones IP.}
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Existen en esta red siete zonas DNS distintas. Los servidores DNS serían de los
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tipos siguientes:
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\begin{itemize}
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\item {\bf Raíz:} {\em desconocido}
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\item {\bf TLD:}
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\begin{itemize}
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\item {\tt dns\_server1}: 99.99.99.99
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\item {\tt servidor\_dns1}: 100.100.102.100
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\end{itemize}
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\item {\bf Autoritativo:}
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\begin{itemize}
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\item {\tt onix}: 150.214.186.69
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\item {\tt dns\_info}: 150.214.7.101
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\item {\tt dns1}: 138.17.117.4
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\item {\tt dns\_sports}: 146.10.158.16
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\end{itemize}
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\end{itemize}
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\noindent
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{\bf c. Un PC que tiene la dirección IP 102.73.18.14 quiere acceder a
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www.cv-cep.ceuandalucia.es. i) Represente gráficamente las peticiones y
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respuestas DNS que ocurren si la búsqueda es iterativa; ii) ¿Qué información
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almacena el servidor DNS local en su caché?; iii) ¿Y la caché del servidor DNS
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local del otro extremo?}
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\hfill
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\begin{tikzpicture}[
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every node/.style={align=center,fill=white!20},
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comp/.style={shape=rectangle,draw}]
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\node[comp] (root) {Raíz (•)};
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\node[comp,below=3em of root] (es) {es};
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\node[comp,below=3em of es] (ceuandalucia) {ceuandalucia};
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\node[comp,below=3em of ceuandalucia] (cv-cep) {cv-cep};
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\node[comp,left=20em of {$(root)!0.5!(cv-cep)$}] (lclDNS) {DNS Local};
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\node[comp,below=3em of lclDNS] (PC) {PC};
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\draw[-stealth] (PC) to[out=110, in=250] node {1} (lclDNS);
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\draw[-stealth] (lclDNS) to[out=40, in=170] node {2} (root);
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\draw[stealth-] (lclDNS) to[out=25, in=185] node {3} (root);
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\draw[-stealth] (lclDNS) to[out=20, in=175] node {4} (es);
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\draw[stealth-] (lclDNS) to[out=5, in=185] node {5} (es);
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\draw[-stealth] (lclDNS) to[out=0, in=170] node {6} (ceuandalucia);
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\draw[stealth-] (lclDNS) to[out=-10, in=180] node {7} (ceuandalucia);
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\draw[-stealth] (lclDNS) to[out=-20, in=170] node {8} (cv-cep);
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\draw[stealth-] (lclDNS) to[out=-30, in=180] node {9} (cv-cep);
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\draw[stealth-] (PC) to[out=70, in=300] node {10} (lclDNS);
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\end{tikzpicture}
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\hfill
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El servidor de DNS local mantendrá (por un tiempo limitado) las direcciones de
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todos los servidores DNS que haya visitado a lo largo de este proceso (i.e.\ es,
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ceuandalucia, etc.). Por el otro extremo, no se guardará nada, ya que sólo
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tienen que conocer aquellos ordenadores directamente inferiores a ellos (e.g.\
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es tan sólo tiene que conocer ceuandalucia, no www).
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2022-01-13 15:52:42 +00:00
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\noindent
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{\bf d.}
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\begin{verbatim}
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Zona fisica
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fisica.ceuandalucia.es. IN NS dns_fisica.fisica.ceuandalucia.es.
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dns_fisica.fisica.ceuandalucia.es. IN A 150.214.8.10
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fisica.ceuandalucia.es. IN MX 10 correo.fisica.ceuandalucia.es.
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correo.fisica.ceuandalucia.es. IN A 150.214.8.11
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Zona ceuandalucia
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fisica.ceuandalucia.es. IN NS dns_fisica.fisica.ceuandalucia.es.
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dns_fisica.fisica.ceuandalucia.es. IN A 150.214.8.10
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\end{verbatim}
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2022-01-10 16:29:23 +00:00
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\pagebreak
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\section{Derechos de Autor y Licencia}
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\noindent
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Copyright \copyright\ \the\year\ Nicolás A. Ortega Froysa
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<nicolas@ortegas.org> \\
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Este documento se distribuye bajo los términos y condiciones de la licencia
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Creative Commons Attribution No Derivatives 4.0 International.
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\end{document}
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