GNS3 allows you to manage connections between the routers, switches, and firewalls without risking the breakdown of the entire equipment. Some of the routers that are compatible with this application include Cisco CCNA, CCNP, CCIP, CCSP, CCVP and CCIE, Juniper JNCIA, JNCIS or JNCIE.
Please check the installation tutorial:
It allows you to create the project from scratch based on your own needs and interests. Dragging and dropping the devices on the panel area can help you in the creation of a network. In case anything goes wrong, a warning message can be prompted, so that you can rectify your mistake. Once you have created a secured typology on the application, you can easily replicate it in the physical environment as well.
Moreover, it also allows you to adjust the criteria for each of the object that you enter in the topology so that the overall network formed can be up to your expectations.
The application is customizable providing you with a view that would make the entire work easy. You can hide the layers and other buttons according to your needs.
GNS3 is an application to help you set up a network virtual topology so that when replicated in the physical environment, there won’t be any risks.