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+\documentclass[12pt,a4paper]{article}
+\usepackage[spanish]{babel}
+
+\title{Redes de Transmisión de Datos}
+\author{Nicolás A. Ortega Froysa}
+
+\begin{document}
+\maketitle
+
+\section{Red Telefónica Conmutada (RTC)}
+\section{Iberpac}
+\section{Red Digital de Servicios Integrados (RDSI)}
+\section{Internet}
+\section{Modo de Transferencia Asíncrono (ATM)}
+\section{Línea Asimétrica Digital de Suscriptor (ADSL)}
+\section{Frame Relay}
+
+\end{document}