Please explain why we make and use active directory ?
The biggest benefit of AD is easy control all PC or system through Central administrator. Meaning to say, in your company if 100 computer are there , you are having your sap id ,so you can login in any system with your sap id and password. But all systems to be in AD.
2nd thing , we can deploy any policy for all PC like password should be 8 character. So this is called GP update in AD. Also all PC, laptops should be same wallpaper. So we can deploy from ADC .and etc.
it is a centralised maching to manage all ou and bu user data
For this purpose, Core i5 2nd generation with 4 GB RAM system is enough to take control 50/100 computers?
Activate directory is use to AD server to device PC centralized domain controller
The server in role installed ie DHCP DNS different types roles installed.