With VLAN, a LAN network can be segmented into different groups, and data in group A cannot be forwarded to group B or other groups, which improves network security and simplify management. As the following figure shows.
![What Is a VLAN and Why Is It Needed? - News - 1](https://www.hansuntel.com/wp-content/uploads/2022/03/02-3.jpg)
Then why VLAN is needed in networks? VLAN reduces the exclusively broadcasts by logically segmenting a large network into many smaller ones, controlling broadcast traffic as well as improving network efficiency.