Question 53

A logical interface used for the routing of VLANs

Creating an SVI (Switched Virtual Interface) on a Layer 3-capable device is essential for routing traffic between different VLANs. This logical interface facilitates the separation of voice and data traffic by allowing each VLAN to communicate with one another while maintaining their distinct traffic flows.

A) A physical interface used for trunking logical ports

This option describes a physical interface that connects multiple VLANs, typically using trunking protocols. However, it does not address the need for logical separation or routing of VLANs, which is the primary function of an SVI.

B) A physical interface used for management access

While management access can be facilitated through physical interfaces, this option does not relate to the separation of voice and data traffic. An SVI is specifically a logical interface used for routing purposes, not merely for management access.

C) A logical interface used for the routing of VLANs

This option accurately describes the purpose of an SVI. By using a logical interface, the network administrator can route traffic between VLANs, which is crucial for separating voice traffic from data traffic effectively.

D) A logical interface used when the number of physical ports is insufficient

This option suggests a scenario where SVIs might be used due to a lack of physical ports; however, it does not capture the essential function of SVIs in routing and separating traffic types. The primary purpose of an SVI is not based on physical port limitations but rather on facilitating inter-VLAN communication.

Conclusion

The correct answer, C, clearly defines the role of an SVI in a network by emphasizing its use as a logical interface for routing VLANs, thereby supporting the separation of voice and data traffic. The other options fail to capture this critical functionality, focusing instead on physical interfaces or irrelevant scenarios. Thus, C is the definitive choice for this use case.