Dear Learners,

Now we know there two roles that are essential for networking, be it the dabbawalas or the computer networks. In the first role, requires the knowledge of the local area and the other know how to navigate the global network. A parallel system is like the one Air traffic controllers. The ground controllers get planes from parking bays to the runway of the departing airport and from the runway of the arriving airport to the parking bay. The tower controllers get the aircraft from one air pot to the other airport. Now let's look at routers and switches who so a similar job on the computer networks.