Routers are networking devices with customized hardware and software for forwarding information. Network Service provides repair solutions for all router brands and their product models includes Cisco Routers, Juniper Routers, D-Link Routers, 3COM Routers, Nortel Routers, Netgear Routers, HCL Routers, Fortinet Routers, Extreme & Foundry Routers.
GNS3 Free network simulator. Emulate network devices to quickly and easily spin up network hardware for testing and educational purposes without the heavy expense of physical hardware. Supported devices include Cisco routers and firewalls, Juniper routers, and frame-relay switches. Runs on Windows, MAC and Linux. This is the link to the GNS3 community https://community.gns3.com/welcome tutorial -> https://itpro.tv/course-library/gns3/gns3-initial-setup/#!