![If we don't subnet and use as our subnet mask then we use all of our IP addresses on one network. This is not an efficient use of our Class. - ppt If we don't subnet and use as our subnet mask then we use all of our IP addresses on one network. This is not an efficient use of our Class. - ppt](https://slideplayer.com/10864949/39/images/slide_1.jpg)
If we don't subnet and use as our subnet mask then we use all of our IP addresses on one network. This is not an efficient use of our Class. - ppt
If the range of IP 172.16.0.0/12 is class B , why can I use the subnet mask 255.255.255.0 in this range? - Quora
![networking - How to correctly set the subnet mask installing Linux Ubuntu 20.04 server? ERROR: '172.16.182.216' is not contained in '255.255.255.0/24' - Super User networking - How to correctly set the subnet mask installing Linux Ubuntu 20.04 server? ERROR: '172.16.182.216' is not contained in '255.255.255.0/24' - Super User](https://i.stack.imgur.com/tXjF8.png)
networking - How to correctly set the subnet mask installing Linux Ubuntu 20.04 server? ERROR: '172.16.182.216' is not contained in '255.255.255.0/24' - Super User
![David Bombal on Twitter: "Peter is confused about something in Windows 10. Why does Windows automatically add subnet masks of different numbers when he configures a PC with an IP address? 10.1.1.1 David Bombal on Twitter: "Peter is confused about something in Windows 10. Why does Windows automatically add subnet masks of different numbers when he configures a PC with an IP address? 10.1.1.1](https://pbs.twimg.com/media/D0Al_vMWwAUnWBa.jpg)