DHCP stands for Dynamic Host Configuration Protocol. 
DHCP is a service that automatically assigns an IP address to a device that is configured for it (workstation, printer, firewall...etc.).  This service is typically set up on a Server, Router, or a Firewall.  A typical DHCPconfiguration would include assigning an IP address, Subnet Mask, Gateway, and DNS.  These configurations would be saved as a "scope."  Any workstation that is set to "Obtain an IP address automatically" is configured to use DHCP.  
For additional information about DHCP or troubleshooting assistance, please contact your network administrator or the Systems Team.