CompTIA Network+ Practice Test

In VLAN configuration, what does the term “trunk” refer to?

1. It restricts access to a single VLAN

2. It is a dedicated line for VoIP traffic only

3. It allows multiple VLANs to share the same physical link

4. It reduces network congestion entirely

The correct answer is: It allows multiple VLANs to share the same physical link

In VLAN configuration, the term “trunk” specifically refers to a network connection that allows multiple VLANs to share the same physical link. This is a critical concept in networking because it facilitates the efficient use of network resources by enabling different VLANs to transmit their traffic over a singular cable or connection point. Trunking is essential in scenarios where inter-switch links need to carry traffic for different VLANs, allowing for effective communication between VLANs on different switches. This helps in reducing the number of physical connections required, simplifying network design and management. In contrast to other options, a trunk does not restrict access to a single VLAN nor is it dedicated only for VoIP traffic. Additionally, while trunking can improve network efficiency, it does not entirely eliminate network congestion; it instead depends on how the traffic is managed across those VLANs. The main takeaway is that trunking brings together the traffic of multiple VLANs over a common link, enhancing the organization and functionality of network infrastructures.