Virtual LANs (VLANs) are a network segmentation technology used to divide a single physical network into multiple logical networks. This allows for better network management, improved security, and enhanced performance. VLANs separate network traffic at the data link layer (Layer 2) based on criteria such as port, user, or function.
Example: In a large organization, there may be different departments such as finance, HR, and marketing. By implementing VLANs, each department can be assigned to a separate VLAN, effectively isolating their network traffic from each other. This not only improves security by preventing unauthorized access between departments but also enhances network performance as broadcast traffic is limited within each VLAN.
Furthermore, VLANs can be used to secure sensitive systems or resources. For instance, servers hosting critical data can be placed in a separate VLAN, accessible only to authorized personnel. This ensures that the server remains isolated from regular user traffic, reducing the risk of unauthorized access or potential attacks.
VLANs also facilitate network management. In an educational institution, for example, VLANs can be configured to segregate student devices from faculty or administrative devices. This simplifies network administration, as IT personnel can apply different security policies and manage each VLAN independently. It allows for the enforcement of access control policies and ensures different user groups have appropriate network access.
Overall, VLANs are crucial for network segmentation, enabling organizations to create secure and organized networks by separating traffic, enhancing security, optimizing performance, and simplifying network administration.
Describe the use of each of the following network segmentation design
technologies to secure networks using examples.
Virtual LANs (VLANs)
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