Describe the process of installing a DHCP server in an AD infrastructure ?

Open Windows Components Wizard. Under Components.

Scroll to and click Networking Services. 

Click Details . 

Under Subcomponents of Networking Services.

Click Dynamic Host Configuration Protocol (DHCP) & then click OK .

Click Next . 

If prompted, type the full path to the Windows Server 2003 distribution files, and then click Next. Required files are copied to your hard disk.