CompTIA Network+ Practice Test

What is a key feature of an internal router concerning VLANs?

1. It cannot connect to VLANs

2. It connects using VLAN interfaces, or SVIs

3. It operates through physical layer connections only

4. It requires a specific username and password for configuration

The correct answer is: It connects using VLAN interfaces, or SVIs

An internal router is specifically designed to facilitate communication between different VLANs (Virtual Local Area Networks) and achieve inter-VLAN routing. One of its most notable features is the ability to connect to VLANs via Switch Virtual Interfaces (SVIs). SVIs are virtual interfaces created on Layer 3 devices that allow you to route traffic between VLANs. Each VLAN can have its own SVI, which acts as a gateway for devices within that VLAN, enabling them to communicate with devices on different VLANs. This capability allows internal routers to manage traffic efficiently and securely across a switched network architecture, discriminating between the various logical networks while maintaining proper routing protocols and reducing broadcast traffic. As a result, this feature is fundamental for organizations that utilize VLANs for segmentation and traffic management, thereby enhancing performance and security within the local network. In contrast, the other options do not reflect the functions or capabilities inherent to an internal router's role in handling VLANs. For instance, an internal router does connect with VLANs through SVIs, rather than lacking that ability or relying solely on physical layer connections. Moreover, while user authentication is important for network management, it does not define a specific feature related to the functionality of internal routers concerning VLAN connections.