A network technician is configuring switches in a small office environment and needs to segment network traffic using Virtual Local Area Networks (VLANs). Which TWO of the following statements correctly describe the primary operational characteristics of VLANs?
- VLANs divide a single physical Layer 2 switch into multiple separate logical broadcast domains.Answer
- Hosts assigned to different VLANs require a Layer 3 routing mechanism to communicate with each other.Answer
- CLayer 2 switch ports automatically convert Ethernet frames into Layer 3 IP packets when moving between VLAN ports.
- DTraffic for all configured VLANs travels across 802.1Q trunk links without adding header tags to the Ethernet frames.
- ESpanning Tree Protocol automatically selects the switch port with the highest VLAN ID to serve as the root bridge.
Answer
The primary operational characteristics of VLANs are that they divide a single physical switch into multiple separate logical broadcast domains, and hosts on different VLANs require a Layer 3 routing mechanism to communicate.
VLANs logically divide physical switches into distinct broadcast domains, which isolates broadcast traffic to specific groups of ports. Additionally, because hosts in different VLANs reside in separate Layer 2 domains, traffic between them cannot be switched directly at Layer 2 and must be routed using a Layer 3 device.
Step-by-Step Solution
Key Concept
VLAN Segmentation and Inter-VLAN Routing Requirements