The Cloonix network simulator provides a relatively easy-to-use graphical user interface. Cloonix provides a wide variety of pre-built filesystems that can be used as virtual machines and provides simple instructions for creating other virtual machine root filesystems.Cloonix has an active development team, who update the tool every two or three months and who are very responsive to user input. Cloonix web site: Common Open Research Emulator (CORE) provides a GUI interface and uses the Network Namespaces functionality in Linux Containers (LXC) as a virtualization technology.Net Sim reveals the arrival time, queuing time, payload and possible error causes for all packets that travel across the nodes and generates reports concerning all events, logging the event time stamp and type.The integrated packet animator allows you to view a graphical representation of how data packets are transmitted through both wired and wireless networks.GNS3 has a large user base, made up mostly of people studying for Cisco exams, and there is a lot of information freely available on the web about using GNS3 to simulate Cisco equipment.Net Sim is a powerful and comprehensive network simulation utility that can assist you in designing an efficient network architecture.The Boson Net Sim Network Simulator for CCNA is the most powerful and versatile Cisco network simulation software available for IT professionals seeking CCNA certification.
Simulations can be run from within the GUI or using the command console.It can assess network reliability, displaying information regarding the system behavior and problems that might occur.Net Sim can create anything from simple home networks to large, complex ones, performing efficiency and reliability verifications to discover connectivity problems.The Net Sim Network Simulator for CCNA product contains CCNA-specific lab exercises that cover the skill set you will need to prepare for your CCNA exam. You can design your own network with up to 200 devices.Currently, over 40 different Cisco router models are supported, with more being added all the time. If you are planning to go for your CCNP, then you should consider the Boson Net Sim for CCNP, which includes all the CCNA-level labs plus CCNP-level labs and CCNP-level functionality.