Packet Tracer is a network modeling and simulation tool allowing the user to build model networks, useful for when the available hardware is expensive. Packet Tracer can be used in training courses and education, or for modeling various scenarios.
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Riverbed Modeler (discontinued)
Score 6.0 out of 10
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Riverbed Modeler provided a comprehensive development environment to model and analyze communication networks and distributed systems. The application has been sunsetted, and is no longer available.
Very suitable for educational purposes or for training new employees on a virtual system. It is also very suitable for making initial designs for networks and presenting them to clients before starting implementation. Unfortunately, it is not suitable for network testing and penetration testing. Also, it is not possible to add Firewall devices from other companies.
Riverbed Modeler needs to improve the scenarios of LAN MAN WAN, as the available scenarios under all of these follow a simple area structure that's not connected to the ISP when it comes to simulation. This generates dummy traffic.
Riverbed Modeler also needs to work on the selection of result sets so that, as with most designed networks, we can select any result parameter to show. All the parameters are displayed, whether they are relevant or not. It needs to display only relevant result parameters to select.
The back-end TCP/IP model needs more clarity to expose the structure to some changes.
There exist many simulation simulators like NS2, but Riverbed Modeler is one of the simulators which introduces the GUI interface for networking. The platform just changes the scenario of networking, as it makes it so easy to understand and implement. The functionality almost listed every possible network in the world, which is not given by any other tool. Moreover, it is releasing updated versions to match with the latest technology.
It comes with a costly paid license, but simulating the network before actual deployment saves a lot of costs, in case after deployment we feel performance is not good and we need to change. This would waste a lot of money, but Riverbed saves this money.
Its OPNET GURU academic edition is available free of cost, but with limited functionality, which is good for students in maximum case. This will degrade our sale of Riverbed Modeler.
A one-time investment in Modeler saves a lot of cost regarding networks, topology, designing, and provides a lifetime license with updates.