Plano de la red
Se reproduce aquí el plano respetando las condiciones de la licencia con la que el autor del plano, Mao06, lo hizo público y que son las siguientes:
I, Mao06, the copyright holder of this work, has published or hereby publishes it under the following licenses:
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License , Version 1.2 or any later version published by the Free Software Foundation ; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled " GNU Free Documentation License ".