In the following figure, what is required on the network to allow Host A to receive an IP address from the existing DHCP server?

A DHCP relay agent installed on Router A interface Gi0/0 will allow clients on Host A's network to obtain IP addressing from DHCP. A second DHCP server on the network where Host A is located will not satisfy the requirement of using the existing DHCP server. A DHCP relay agent on the interface Gi0/0 located on Router B will not help serve IP addresses on the Host A network. A DHCP relay agent cannot be configured on a layer 2 switch.