2022-01-12 14:19:27 +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 II: 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} & v01r01 \\ \hline
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{\bf Fecha Creación} & \the\day/\the\month/\the\year & \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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\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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\section{Jerarquía del Espacio de Nombres}
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2022-01-12 14:19:27 +00:00
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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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tftp1.docsis.finantial.com. & TFTP & 172.26.1.10 \\ \hline
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dns\_doc.docsis.finantial.com. & DNS & 172.26.1.11 \\ \hline
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pppserver.docsis2.finantial.com. & SSH & 172.26.3.7 \\ \hline
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dns\_doc2.finantial.com. & DNS & 172.26.3.8 \\ \hline
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ftp\_arch.ojm.com. & FTP & 172.32.10.2 \\ \hline
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dns1.ojm.com. & DNS & 172.32.10.3 \\ \hline
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www.ojm.com. & HTTP & 172.32.12.4 \\ \hline
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coco.labcom.org. & STREAMING & 10.0.12.3 \\ \hline
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dns\_cocolab.labcom.org. & DNS & 10.0.12.4 \\ \hline
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www.cv-cep.ceuandalucia.es. & HTTP & 192.168.12.100 \\ \hline
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wjade.cv-cep.ceuandalucia.es. & HTTP & 192.168.12.53 \\ \hline
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dns\_info.cv-cep.ceuandalucia.es. & DNS & 192.168.12.40 \\ \hline
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mailservery.europa.es. & MAIL & 10.0.10.100 \\ \hline
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dns\_eur.europa.es. & DNS & 10.0.10.120 \\ \hline
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\end{tabular}
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\caption{Espacio de nombres.}
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\end{table}
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2022-01-12 19:11:00 +00:00
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\noindent
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{\bf a. Representar mediante un gráfico el espacio de nombres utilizado.}
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Figura \ref{fig:tree}.
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\begin{figure}[h!]
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\centering
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2022-01-12 14:19:27 +00:00
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\begin{tikzpicture}[sibling distance=5em,
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level distance=7em,
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rotate=90,
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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 1/.append style={sibling distance=8em},
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level 2/.append style={sibling distance=6em},
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level 3/.append style={sibling distance=3em}]
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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[branch] {docsis}
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child { node[leaf] {tftp1} }
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}
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child { node[branch] {docsis2}
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child { node[leaf] {pppserver} }
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}
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}
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child { node[branch] {ojm}
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child { node[leaf] {ftp\_arch} }
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child { node[leaf] {www} }
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}
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}
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child { node[branch,tld] {org}
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child { node[branch] {labcom}
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child { node[leaf] {coco} }
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}
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}
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child { node[branch,tld] {es}
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child[sibling distance=3em] { node[branch] {ceuandalucia}
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child { node[branch] {cv-cep}
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child { node[leaf] {wjade} }
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child { node[leaf] {www} }
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}
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}
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child[sibling distance=3em] { node[branch] {europa}
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child { node[leaf] {mailservery} }
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}
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};
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\end{tikzpicture}
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\caption{Árbol del espacio de nombres.}
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\label{fig:tree}
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\end{figure}
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2022-01-12 19:11:00 +00:00
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\pagebreak
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\hfill
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\noindent
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{\bf b. Identifique cada una de las zonas DNS bajo .com, incluyendo éste.
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Indicar el nombre y la dirección IP de los servidores de cada una de las zonas.
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En el caso de que se traten de servidores DNS indique su tipo. Si no conoce el
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nombre o IP de algún servidor utilice ``{\tt server\_xxxx}'' e ``{\tt
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IP\_server\_xxxx}'', donde xxxx representa el nombre de la zona.}
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Figura \ref{fig:zones-com} y tabla \ref{tbl:zones-com}.
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2022-01-12 14:19:27 +00:00
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\begin{figure}[h!]
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2022-01-12 19:11:00 +00:00
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\centering
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2022-01-12 14:19:27 +00:00
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\begin{tikzpicture}[sibling distance=5em,
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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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label/.style={draw=none,fill=none}]
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\matrix[row sep=1em,column sep=0.5em] {
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\node[label] {Zona I}; &
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\node[label] {Zona II}; &
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\node[label] {Zona III}; \\
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\node[tld,branch] {com}
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child { node[branch] {finantial} }
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child { node[branch] {ojm} }; &
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\node[branch] {finantial}
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child { node[branch] {docsis} }
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child { node[branch] {docsis2} }; &
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\node[branch] {ojm}
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child { node[leaf] {ftp\_arch} }
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child { node[leaf] {www} }; \\
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\node[label] {Zona IV}; &
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\node[label] {Zona V}; \\
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\node[branch] {docsis}
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child { node[leaf] {tftp1} }; &
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\node[branch] {docsis2}
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child { node[leaf] {pppserver} }; \\
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};
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\end{tikzpicture}
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2022-01-12 19:11:00 +00:00
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\caption{Mapa de zonas DNS de {\tt .com}.}
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\label{fig:zones-com}
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\end{figure}
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\begin{table}
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\centering
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\begin{tabular}{|c|c|c|}
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\hline
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{\bf Zona} & {\bf Servidor} & {\bf Dirección IP} \\ \hline
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Zona I & server\_com & IP\_server\_com \\ \hline
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Zona II & dns\_doc2 & 172.26.3.8 \\ \hline
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Zona III & dns1 & 172.32.10.3 \\ \hline
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Zona IV & dns\_doc & 172.26.1.11 \\ \hline
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Zona V & server\_docsis2 & IP\_server\_docsis2 \\ \hline
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\end{tabular}
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\caption{Tabla de zonas DNS de {\tt .com}.}
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\label{tbl:zones-com}
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\end{table}
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\hfill
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\noindent
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{\bf c. ¿Quién resolverá la petición DNS sobre el servidor {\tt coco.labcom.org}
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¿Qué información contendrá la base de datos DNS de {\tt org}?}
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La petición DNS se resolverá con el orden DNS raíz $\to$ DNS org $\to$
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dns\_cocolab.labcom.org. La base de datos DNS de {\tt org} contendrá la
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dirección del servidor dns\_cocolab.labcom.org.
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\pagebreak
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\noindent
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{\bf d. Se quiere añadir un nuevo dominio denominado arquitectura.europa.es.
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sobre el que se insertará un servidor DNS llamado dns\_ar.arquitectura.europa.es
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con IP 10.0.200.12, y otro de correo electrónico llamado
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correoar.arquitectura.europa.es con IP 10.0.201.11. Indique dónde y si puede los
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registros RR hay que añadir.}
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Habría que añadir los siguientes registros:
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\begin{itemize}
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\item En dns\_eur.europa.es: {\tt dns\_ar.arquitectura.europa.es DNS
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10.0.200.12}
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\item En dns\_ar.arquitectura.europa.es: {\tt
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correoar.arquitectura.europa.es MX 10.0.201.11}
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\end{itemize}
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\pagebreak
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\noindent
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{\bf e. La estación haile.docsis.finantial.com quiere solicitar un recurso al
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servidor www.cv-cep.ceuandalucia.es para lo que realiza una consulta DNS.
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Represente cómo se realizaría dicha consulta en el caso de que fuese iterativa.
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¿Qué información se almacenaría en la caché DNS del servidor local? ¿Y en la
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caché del servidor DNS del otro extremo?}
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\begin{figure}[h!]
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\centering
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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\_doc};
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\node[comp,below=3em of lclDNS] (PC) {haile};
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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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\caption{Consulta iterativa para www.cv-cep.ceuandalucia.es.}
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\label{fig:iterative-query}
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\end{figure}
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2022-01-12 19:11:00 +00:00
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En el servidor DNS local (i.e.\ dns\_doc.docsis.finantial.com) se guardarán las
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direcciones de los IP de los DNS de es, ceuandalucia, y cv-cep. No guadará de
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nuevo a la raíz, ya que la tiene (a no ser así, no podría hacer la petición).
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Los servidores DNS locales del otro lado no guardarán nada.
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2022-01-12 14:19:27 +00:00
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\pagebreak
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\section{Derechos de Autor y Licencia}
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Copyright \copyright\ \the\year\ Nicolás A. Ortega Froysa <nicolas@ortegas.org>
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\\
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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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