If only the gateway and DNS server information needs to be delivered to a DHCP client, the DHCP Offer message sent by the DHCP server to the client does not carry the Options field.

The Options field in DHCP messages uses the type-length-value (TLV) structure and can carry parameters such as the NTP server address, AC address, and log server address.

DHCP supports static IP address allocation, in which it assigns fixed IP addresses to specified terminals.

When a DHCP client and a DHCP server are located on different Layer 3 networks, a DHCP relay agent is needed for forwarding packets between the DHCP client and server.