CCNA Network Simulator (CCNA Netsim): The software tool mimics real router/switch network to a certain extent and useful for candidates preparing for CCNA exam. Simulation of RIP, OSPF and BGP protocols enables users to practice configuration exercises. You can develop your own labs in addition to the existing lab exercises. Check out the available CCNA labs. Download free network simulator and premium version may be activated online.

Juniper Network Simulator (Juniper Netsim): Juniper netsim works in similar way as that of CCNA Netsim, but in Juniper JUNOS environment. You can simulate virtual Juniper network using Juniper JUNOS routers and switches. Checkout the available Juniper labs. You may create your own labs and experiment with inbuilt GUI designer. Dozens of lab exercises enables candidates to practice thoroughly for the exam.