A systems administrator is configuring a new physical server that needs to host services for two separate, isolated networks: a production database network (VLAN 110) and a management network (VLAN 120). The server's network adapter is connected to a switch port configured as an 802.1Q trunk. Which of the following server-side configurations is required to allow the server to communicate on both VLANs simultaneously?
Enable VLAN tagging on the network adapter and create virtual interfaces for VLAN 110 and VLAN 120.
Assign two static IP addresses to the physical network adapter, one for each VLAN's subnet.
Request that the network administrator change the switch port from a trunk to an access port for VLAN 110.
Disable the server's host-based firewall to allow untagged traffic from both VLANs.
The correct action is to enable VLAN tagging on the server's network adapter. When a server's network port is connected to a switch port configured as an 802.1Q trunk, the server's operating system or network interface card (NIC) is responsible for adding a VLAN tag to each outgoing Ethernet frame. This tag identifies which VLAN the frame belongs to, allowing the switch to forward it correctly. To communicate on both VLAN 110 and VLAN 120, the administrator must create virtual network interfaces on the server, one for each VLAN, and assign the appropriate tag (110 and 120) to each respective virtual interface.
Assigning multiple static IPs to a single physical adapter without VLAN tagging is incorrect because the untagged frames would be dropped by the trunk port or sent to the native VLAN, failing to reach their intended destinations on VLAN 110 and 120. Requesting the switch port be changed to an access port is incorrect because an access port can only belong to a single VLAN, which would prevent communication on the second required VLAN. Disabling the firewall is irrelevant to solving the Layer 2 VLAN connectivity issue and is a poor security practice.
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