Hi HI
answer is UDP encapsulation
Explanation:
The device can function as the DHCP server to assign IP addresses to clients. After a DHCP client sends a message to the DHCP server to request configuration parameters, the DHCP server responds with a message carrying the requested configurations based on a policy. Both DHCP Request and Response messages are encapsulated by UDP.
When the device functions as the DHCP server, create an address pool on the device to provide IP addresses to DHCP clients. The address pool can be a global address pool or an interface address pool. The device allocates IP addresses to clients by using the global address pool or an interface address pool:
If a DHCP server based on a global address pool is configured, all online users of the server can obtain IP addresses from this address pool. The global address pool is used when the DHCP server and client are located on different network segments.
If a DHCP server based on an interface address pool is configured, only users that go online from this interface can obtain IP addresses from this address pool. The interface address pool is used when the DHCP server and client are located on the same network segment.
Source:
https://support.huawei.com/enterprise/en/doc/EDOC1000027412?section=j007