Which two are features of a DHCP relay agent?
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Correct answer: minimizes the necessary number of DHCP servers, is configured under the Layer 3 interface of a router on the client subnet.
Why this is the answer
A DHCP relay agent forwards DHCP requests between clients and DHCP servers located on different subnets. This minimizes the number of DHCP servers needed because one central server can serve multiple subnets, rather than requiring a server on each subnet. The relay agent is configured on the Layer 3 interface of a router that is directly connected to the client's subnet, using the ip helper-address command. This command specifies the IP address of the DHCP server to which requests should be forwarded. DHCP relay agents do not assign DNS locally; they forward the entire DHCP request. While an interface can have multiple ip helper-address commands, only one is typically needed for DHCP. MAC-to-IP reservations are a DHCP server function, not a relay agent function.
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