SK0-005 · Question #395
A systems administrator is setting up a second VLAN for end users. Which of the following should be provisioned for a DHCP server to be able to receive client requests from a different subnet?
The correct answer is D. Relay agent. To enable DHCP clients on a new VLAN (different subnet) to receive IP addresses from a DHCP server located on another subnet, a DHCP relay agent must be provisioned.
Question
A systems administrator is setting up a second VLAN for end users. Which of the following should be provisioned for a DHCP server to be able to receive client requests from a different subnet?
Options
- ADHCP options
- BNIC teaming
- CZone transfers
- DRelay agent
- EVLAN ID
How the community answered
(44 responses)- A2% (1)
- B2% (1)
- C11% (5)
- D77% (34)
- E7% (3)
Why each option
To enable DHCP clients on a new VLAN (different subnet) to receive IP addresses from a DHCP server located on another subnet, a DHCP relay agent must be provisioned.
DHCP options are configurations within the DHCP scope (like DNS servers or default gateways) but do not facilitate the communication between clients and a DHCP server across different subnets.
NIC teaming (or LACP) aggregates multiple network interface cards for redundancy or increased throughput on a single server and is unrelated to inter-VLAN DHCP communication.
Zone transfers are a DNS mechanism for replicating DNS database information between DNS servers and have no bearing on DHCP client-server communication across subnets.
DHCP requests are broadcast messages and are typically confined to the local subnet. When a DHCP server is on a different subnet than the clients, a DHCP relay agent (often configured on a router or Layer 3 switch) is necessary to forward these broadcast requests to the DHCP server and relay the responses back to the clients.
A VLAN ID is assigned to a VLAN to logically segment a network, but it alone does not enable DHCP requests to cross router boundaries to a server on a different subnet.
Concept tested: DHCP relay agent / inter-VLAN DHCP
Source: https://learn.microsoft.com/en-us/windows-server/networking/technologies/dhcp/dhcp-relay-agent
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