200-301 Question 30
Single answerA network administrator is configuring a server to act as a DHCP server in a small office network. The server is connected to a single switch that has multiple VLANs. The administrator needs to ensure that the DHCP server can provide IP addresses to clients in all VLANs. What is the MOST important configuration step on the server or network equipment to achieve this?
- A
Enable trunking on the switch port connected to the DHCP server.
- B
Configure multiple default gateways on the DHCP server.
- C
Install multiple NICs on the DHCP server, one for each VLAN.
- D
Configure DHCP relay (IP Helper) on the switch for each VLAN.
Show answer and explanation
Correct answer: A
Explanation
To allow a DHCP server to provide IP addresses to clients in multiple VLANs, the server must be able to communicate with all VLANs. Enabling trunking on the switch port connected to the server ensures that traffic from all VLANs, tagged with their respective VLAN IDs, can reach the server. This allows the server to serve multiple VLANs without requiring additional hardware or complex configurations.
- A. Correct.
Enabling trunking on the switch port connected to the DHCP server allows the server to send and receive traffic tagged with VLAN IDs, enabling it to serve multiple VLANs. This is the correct solution.
- B. Incorrect.
Configuring multiple default gateways on the DHCP server is not possible, as a server typically has only one default gateway. This does not solve the issue of serving multiple VLANs.
- C. Incorrect.
Installing multiple NICs, one for each VLAN, is an impractical solution for most environments. Trunking is a more efficient and scalable approach.
- D. Incorrect.
Configuring DHCP relay (IP Helper) on the switch is required when the DHCP server is on a different subnet or VLAN. However, in this scenario, the server is directly connected to the switch, so this is not necessary.