An IP Helper (IP Helper Address) allows DHCP requests to pass through routers and reach a DHCP server on another network.
DHCP broadcasts are not forwarded across routers by default, so an IP Helper Address is needed to relay the request.
This is crucial for large networks where a single DHCP server serves multiple subnets.
Option B (Reservation): Ensures a specific IP address is assigned to a MAC address but does not relay DHCP across networks.
Option C (Exclusion): Prevents specific IP addresses from being assigned, but does not help with DHCP relay.
Option D (Scope): Defines the range of IP addresses available for DHCP clients but does not assist in cross- network communication.
? Reference: CompTIA Network+ (N10-009) Official Study Guide - Section: DHCP and IP Addressing