Exploring VLAN to Improve Your Network Performance
A Virtual Local Area Network (VLAN) is a computer network used in various sectors, including schools, offices, residential areas, and industries. While it is widely used, not everyone fully understands its function, especially network administrators and fiber optic service providers worldwide.
VLAN overcomes the physical limitations of a Local Area Network (LAN), enabling companies and organizations to segment their networks, reduce latency, and enhance security. It also simplifies traffic data management and offers greater flexibility compared to traditional LANs, especially when relocation is required.
What is VLAN?
VLAN is a group of devices located within one or more Local Area Networks that are configured to communicate with each other. Although VLAN is part of a LAN, it functions as if it has its own dedicated communication channel. Typically, VLAN configurations are done through software, so there is no need to reconfigure the network when moving devices.
Types of VLAN
Based on their function, VLAN networks are divided into five types:
- Default VLAN
This is the VLAN that exists once the switch is activated, automatically named VLAN1. Default VLAN cannot be altered or disabled. - Voice VLAN
Voice VLAN is a network that supports VoIP services. It is designed specifically to support activities related to voice communication. One of the advantages of Voice VLAN is that it separates traffic from other VLANs for better data management. - Data VLAN
This VLAN is used to divide a network into two parts or groups. Data VLAN controls the flow of data within the VLAN network or any custom configurations set by the user. - Native VLAN
As the name suggests, the Native VLAN is the network that is returned to a port if it lacks a tag. Unlike the Default VLAN, the Native VLAN can be changed or disabled. However, it is not automatically tagged when received at a trunk port. - Management VLAN
This VLAN is configured to manage switch operations. Management VLAN is used to handle bandwidth management, monitoring, and logging systems.
Functions and Benefits of VLAN
VLAN facilitates the configuration of physical computer networks into several broadcast domains. Even though the broadcast domains are different, the VLAN can pass through the same connecting devices. Network service providers globally typically configure VLANs using systems like Cisco or MikroTik. VLAN technology allows multiple virtual LANs to coexist on a physical LAN by using switches in a regular LAN setup.
VLAN offers several key benefits:
- Enhances Security
VLAN works similarly to a conventional LAN, but with wireless access that can be used anytime and anywhere. VLAN restricts access to sensitive data, which boosts security and reduces the risk of unauthorized access. - Cost Savings
VLAN provides all the benefits of a LAN without the need for additional cables or routers. This makes it a cost-effective solution as you avoid purchasing new devices for each network expansion. - Once Configuration
Even if devices are moved, there is no need to reconfigure the network like in a traditional LAN. VLAN ensures that devices remain connected to the network, no matter the time or location. - Improves Performance
By separating non-essential networks from critical ones, VLAN optimizes performance and reduces data traffic loads. - Simplifies Administration
VLAN simplifies network administration. It ensures that all computers are connected and can access servers from remote locations with ease.
