CompTIA Network+ Practice Test

An SVI, or Switched Virtual Interface, is a virtual interface on a switch used to facilitate communication between different VLANs. SVIs enable Layer 3 communication for VLANs, which means they can provide an IP address and support routing to allow devices within different VLANs to communicate with each other. When a switch operates with multiple VLANs, each VLAN can have a corresponding SVI that serves as the gateway for devices within that VLAN.

By using SVIs, network devices connected to different VLANs can route traffic through the switch, allowing for efficient communication without needing a dedicated router for each VLAN. This capability is crucial in modern networking environments, where virtualized networks are common, and efficient traffic management is necessary.

The alternative choices do not accurately describe the function or purpose of SVIs. For example, Scalable Virtual Interface and Secure Virtual Interface do not reflect the actual function provided by SVIs in VLANs, while Shared Virtual Interface does not exist in this context. The correct term that captures the essential function of an SVI in VLAN communication is Switched Virtual Interface.