 So, if you ever have looked at configuration interface of home Wi-Fi router it looks something like this. So, you have something called the internet setup and the network setup. So, internet is basically the outward side of your router which is in the case of a home router your internet service provider and the inward side which is where your Wi-Fi device is connect is your local area network. So, your network setup basically gives IP addresses to the devices connected to the router in the local area network or LAN and the internet setup basically gives the IP address from the service provider. Now, here what we see is this particular router is connected to the hostel network and it has been given an address of 172.16.15.4 so, when we see the subnet mask here we see that any address which has 172.16, 0 to 255 here or 0 to 255 here belongs to the same network. So, you have a lot of IP addresses available here which is good enough for say a network for a hostel. Now, this IP address is the outward IP address of a router. Now, when we look at the network setup so, here what we have is all the devices that connect to the wireless router and which in turn connects them to the internet. So, all these network network devices have been given a separate set of IP addresses. So, what we see here is and a point also to notice that no two interfaces of a router can fall in the same network. So, what the router does it connects two different networks. So, two interfaces of an router cannot fall in the same network. Now, here we see is in the local area network we have the network 192.168.0.1 with this subnet mask that means, we can have 255 addresses in this address in this network address. Something interesting that we see here is something called DHCP or Dynamic Host Configuration Protocol. Now, this is what enables us to dynamically assign IP addresses to devices as they connect. So here the setting says that the starting IP addresses for DHCP would be 192.168.0.100 and maximum number of users that it could assign IP addresses dynamically would be 50. A typical home Wi-Fi router can sustain up to something somewhere around 15 to 20 devices. So, 50 would be a good enough number for a typical Wi-Fi router. So as soon as these devices connect to this Wi-Fi router, they are automatically assigned the IP address by the router. Now, let us look at this device and the IP address has which has been assigned. So, we see here DHCP has been activated. So, what we see here is that DHCP has assigned the IP address 192.168.0.100 with the same subnet mask and default gateway is the IP address of the router itself which we saw when we were looking at the router's configuration page. Now that we have seen DHCP is able to assign addresses dynamically. Now let us see what happens when we have to assign IP addresses manually.