Virtual Privet Networks using Cisco Routers. Journal of Engineering and Sustainable Development, [S. l.], v. 13, n. 4, p. 10–27, 2009. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1493.. Acesso em: 22 jul. 2024.