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Hello Friends, Welcome to Gate Smashers in today's video we are going to discuss Subnetting and subnetting we are discussing in classful addressing where we divide IP addresses into different classes class A, B, C, D, E and here if we talk about one of the most important topic is of computer networks that is subnetting and students very easily get confused that what is subnetting? how actually we divide network into subnets So in this video I am going to explain you with examples that why actually subnetting is done What it is? and how actually we implement it? So first of all, what is Subnetting? dividing the big network into small networks means we have a big network and that we have to divide into small networks that is what a simple meaning of subnetting So question No. 1 comes that what is its purpose? Why we are dividing it? So if we take a simple example Let's say we have a big university a big organization Now the bigger the organization, the bigger the university the more you will find it difficult to maintain it How? Let's say we take address of class A, In class A we know that two twenty 2 raise to power 24 No. of host are possible inside every class A network now in this much number, it is in crores this much no. of host are possible to maintain all these to manage all these is will obviously be difficult, but if we divide this into small small parts then the maintenance will become easy. Suppose we have a big university in big university different departments for examinations, placement there are department for co-curricular activity department for academics and library system to manage all these either you appoint one administrator but obviously managing all this is very difficult. and if we divide this into separate parts Let's say we made one subnet for examination that you handle examinations only one we made for placement which will see placement related activity one we made let's say for academics for academics related one we made for co-curricular activities which will talk related to that only So we did logically divided the big network in our organization, we can divide in multiple also. The network whose address we take for that we have been assigned in internet we need number authority. There we will need assigned authority but what we are doing internally we always do subnetting within the organization with our own choice, so we can make multiple subnets. So obviously So this will have separate network admin network admin, network admin, network admin so of their respective blocks, their own subnets they will take care off So maintenance is easy, and managing all this is easy and here when class A has so many number of host so the wastage there will be also less. Second thing we will talk here about security In such a large organization when there are a...