Listas de control de acceso ACL

http://www.slideshare.net/88palacios/acl-estandar
http://virtualbook.weebly.com/uploads/2/9/6/2/2962741/ac__list.pdf
http://www.redespracticas.com/?pag=txtACLcsco.php&Njs=t
http://newfly.wordpress.com/2012/04/23/ejercicio-packet-tracer-iniciarse-en-las-acl%C2%B4s/