 Welcome back. So we have learned a lot about networks till now. One of the things with learning anything technical is to be able to try it out. The best part is if you are able to try it out in real setting, real life setting. But as we know networks are something very huge and the devices itself are not easy to get. So one of the ways you can do it is by using a simulation software. This actually gives you a very good hands on experience on how networks work. So the simulation software that we have chosen to use is called Cisco Packet Tracer and we will just give you a brief introduction on what actually packet tracer does. What is Cisco packet tracer? Cisco packet tracer is a network simulation software that provides virtual experience of working with these things. And when I say virtual experience though it is virtual, it is very close to what the real deal is. So you get to see how the routers look like, the kind of interfaces they have and you actually get to see the command line interface as though if you would have logged into the actual router. And with the number of devices that are available in Cisco packet tracer you are able to create as many as networks as huge as networks as possible and try to configure a lot of different type of protocols, try different services and a lot of things. Cisco packet tracer is actually a playground. Every time you get to learn something new you could just go back to Cisco packet tracer and try it out. So there are a lot of ways, a lot of options that you have. Yes it is from Cisco so most of the devices are the Cisco routers and the Cisco switches. Let's go ahead first look at how do you actually go ahead and get Cisco packet tracer. So the one really good thing about Cisco packet tracer is it's a free software. What you have to do is register at Cisco network at Academy which is an academy by the company Cisco. In this academy you get a lot of courses on networking and new technologies that are close to networking like Internet of Things and all of those.