A network emulator built for Cisco products will try to recreate the physical process of assembling a network, as well as going through the logic of the ordeal. Several choices exist, some being free and some paid, so that students and instructors alike can benefit from using the programs to get more practice in.

Netsim is a program developed by Boson to emulate a network. It’s great because instructors can use it to give out labs, assignments, easily grade said assignments, and instantly get feedback on where students need help. The only downside of the program is that it’s costly- something to the tune of $200 for the least expensive license. Students will probably want to look elsewhere to save money.

Open source programs should receive the attention of students since they are free to download and use. Dynagen is one such program, of which is built with the Dynamips simulator. Dynagen is one of two software packages that currently works with Dynamips, and is often described as being the less friendly of the two. Documentation is also lacking for those with questions.

GNS-3 is another program based on the Dynamips emulator. GNS-3 is more popular among beginners since it has a better interface and better support. GNS-3, or Graphical Network Simulator, has a developer’s forum and video tutorials to get students ready to use the program. It may not have key features that Netsim has, but teachers can still issue this free program to students and have take-home assignments for them to complete.

Cisco’s own program, Packet Tracer, is one that is only available to Academy students. To qualify, you only need to enroll in an accredited program. Most universities and community colleges will have some form of computer networking class that uses the Cisco learning suite. Packet tracer is considered to be the best option, but due to its lack of public availability, it’s the hardest to get. You may ask an instructor or friend in a class if you can use the software for personal learning means.

Desktop programs allow for your computer to create very realistic environments for you to use in learning about networks. You may go the route less traveled and instead sign up for a web-based emulation package. Just like desktop software, these programs may or may not charge a fee for using them. You will need an Internet connection to access them, so they aren’t always available when you need them.

Final Thoughts

Network simulation is advanced technology. Thus, there aren’t too many choices to dwell on while you are looking for a study aid. Check those mentioned and perhaps do some searching of your own to see if updates or new programs are on the horizon.

Learn more about Download Packet Tracer 5 and Packet Tracer Configuration.