Free updates. This software program allows users to create drag and drop, virtual networks of any size. Follow over 100 prescribed labs or create/save/load your own networks with an unlimited number of devices. This program accepts Ciscoâ„¢ Semester 2 Lab commands. A user can use their Ciscoâ„¢ Semester 2 Lab Book along with this program. Personalize your network layouts that display ip addresses, port numbers, and host names.