What is commonly used to convert DHCP broadcast messages to unicast messages and forward them to DHCP servers on a separate subnet?

What is commonly used to convert DHCP broadcast messages to unicast messages and forward them to DHCP servers on a separate subnet?

• DHCP Relay Agent
• DHCP Reservation
• DHCP Filter
• DHCP Forwarder         

EXPLANATION

Generally, DHCP messages are broadcasted. So, in order for the messages to be exchanged between a DHCP client (PC) and DHCP server, both the client and server have to reside on the same subnet. That is because routers do not forward any broadcast IP packet (i.e. one with a destination MAC address of FF:FF:FF:FF:FF:FF and a destination IP address of 255.255.255.255) to other interfaces. Thus, a broadcast DHCP packet sent by a DHCP client cannot be delivered to DHCP server(s) on different subnet(s) through a router.

To address this problem, the concept of a DHCP relay agent has long been adopted.  The core function of this DHCP relay agent is to convert broadcast DHCP packets into unicast messages and then forward them to DHCP servers

SOURCE

https://www.netmanias.com/en/post/blog/6004/dhcp-network-protocol/what-is-a-dhcp-relay-agent