Computer networking students are caught in between a rock and a hard place when going through difficult course studies. Students need access to hardware available in class to do labs and reports, and may not have the same hardware at home to work on. Emulation programs have sought to fix this problem.

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.

Not all network simulators are desktop simulations. You can find some simulators available over the Internet through web browsers, using technology such as Java or JavaScript. You will find that these web-based programs can be less expensive, and some free, but you will have to have a connection to the Internet to access it. Thus, it could be hard studying if you don’t have access to the Internet.

Closing Comments

You won’t find a much better network simulation package than Cisco’s Packet Tracer. If you can, find a way to get the program either by enrolling in the Cisco Academy or finding other means of getting it. It’s currently the best there is for learning advanced course materials.

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