What is scope and super scope?
A scope is a logical grouping of IP addresses for computers on a subnet that use the DHCP service. The Master first makes a scope for each physical subnet and then uses the scope to define the parameters used by clients.
A superscope is a master feature of DHCP servers running on Windows Server that you can make and manage through the DHCP console. Using a superscope, you can join multiple scopes as a single administrative entity.