VLAN
Virtual LAN ”” a logical network segment that groups devices on different physical switches as if on the same network.
Also: Virtual Local Area Network
Definition
A Virtual Local Area Network (VLAN) is a logical grouping of network devices on different physical network segments as if they were connected to the same physical network. VLANs are configured on managed switches and segment traffic at Layer 2 (Data Link) without requiring separate physical infrastructure. VLANs improve security (isolating traffic between departments), reduce broadcast domains, and simplify network management. Trunking (IEEE 802.1Q) allows multiple VLANs to share a single network link.
Example
“A company uses VLANs to logically separate HR, Finance, and Engineering traffic on the same physical switches, preventing departments from accessing each other's network resources.”
Usage Examples
- 1
“The team applied vlan best practices to improve their networking outcomes significantly.”
- 2
“Understanding vlan is essential for anyone building a career in IT & Technology.”
When & How to Use
Use 'VLAN' when working in Networking contexts where a virtual local area network (vlan) is a logical grouping of network devices on different physical network segments as if they were connected to the same physical network.
- ▸Applying vlan principles during a networking project or initiative
- ▸Explaining vlan to a junior team member or stakeholder unfamiliar with IT & Technology
- ▸Evaluating options or proposals using vlan as a decision-making criterion
Etymology & Origin
The term 'VLAN' derives from professional usage and entered IT & Technology professional usage as the field formalised in the 20th century.
History & Evolution
The concept of vlan has evolved alongside IT & Technology. Early practitioners relied on informal methods; structured approaches emerged with the professionalisation of networking in the mid-20th century. Today, vlan is a standard part of IT & Technology practice globally.
Synonyms
- virtual network segment
- logical network
- network partition
Antonyms / Opposites
- physical LAN
- flat network
Images
CC-licensed · free to useVideo
Related Terms
- network-switch
- trunk-port
- broadcast-domain
- network-segmentation