Which method of configuring a VLAN offers the best scalability?

Frame tagging is the method of configuring a VLAN that offers the best scalability because it allows for the efficient management of multiple VLANs over a single physical network link. In frame tagging, VLAN information is added to the data frames as they traverse the network, allowing switches and routers to recognize and separate traffic belonging to different VLANs. This technique, often implemented using protocols like IEEE 802.1Q, enables a more flexible and scalable design in larger networks.

As network demands grow, adding new VLANs using frame tagging does not require significant changes to the physical infrastructure. It allows for the dynamic adjustment of VLAN configurations based on traffic requirements without needing to reconfigure underlying hardware. This can be especially useful in environments with many users and devices, such as enterprises or data centers, where network architecture can become complex.

In contrast, static configuration is less scalable because it requires manual provisioning for each VLAN and can become cumbersome as the number of VLANs increases. Protocol-based configuration can improve scalability but may introduce complexities with protocol dependencies. Dynamic address allocation is more related to IP address management than to VLAN configuration itself. Thus, frame tagging stands out as a method that provides streamlined, scalable solutions for managing VLANs in larger networks.