With Microsoft Windows, a split-scope DHCP deployment describes which of the following?

With Microsoft Windows, a split-scope DHCP deployment describes which of the following?

• One server providing a discontinuous address range
• Two servers, each responsible for dedicated scopes
• One server providing multiple scopes and settings 
• Two servers providing addresses from same scope 

EXPLANATION

Split-scope DHCP describes two servers giving away addresses from within the same scope. To avoid conflicts, the scope is cut into segments by adding “exclusion ranges”, so that one DHCP will only hand out addresses the other won’t.

Split-scope DHCP provides redundancy for the network. There is no communication between the DHCPs, so it is not a real failover. Reservations can be created on both servers. Then, in the event that one server fails, the reservation will take effect, even if it is inside the running server's exclusion range.

2012 R2 now offers the more comfortable DHCP-failover clustering, which removes the need for distinct exclusion ranges. Instead, the servers now “talk” to each other and synchronize leases. However, for now no other settings (scope settings, reservations) are synchronized, but there is a PS-script for this as well.
http://www.exitthefastlane.com/2010/09/split-scope-dhcp-in-server-2008-r2.html