Network emulation is like playing a pretend game, but in this case it's a computer game. In network emulation, you can create a pretend version of a network, using a computer program. You can use this pretend network to test things like new applications or software and see how they work before you use them for real. Doing this can help keep your real network safe and reliable, because you can make sure everything works properly in the pretend network first, so you know it won't mess up your real network.