web grafia

https://www.google.com.co/search? q=imagenes+de+firewall&rlz=1C1VSNG_enCO655CO655&espv=2& biw=1366&bih=667&source=lnms&tbm=isch&sa=X&ved=0CAYQ_A UoAWoVChMIvc2DiqvmxwIVhqQeCh2RCQYt#imgrc=IpMYMxHOLLA G3M%3A... More

https://www.google.com.co/search? q=imagenes+de+firewall&rlz=1C1VSNG_enCO655CO655&espv=2& biw=1366&bih=667&source=lnms&tbm=isch&sa=X&ved=0CAYQ_A UoAWoVChMIvc2DiqvmxwIVhqQeCh2RCQYt#imgrc=IpMYMxHOLLA G3M%3A http://geekland.eu/que-es-y-para-que-sirve-un-firewall/ WEB GRACIA Less