How do you explain VLAN?

VLANs allow network administrators to automatically limit access to a specified group of users by dividing workstations into different isolated LAN segments. When users move their workstations, administrators don’t need to reconfigure the network or change VLAN groups.

Why do we use VLANs?

A VLAN allows different computers and devices to be connected virtually to each other as if they were in a LAN sharing a single broadcast domain. A VLAN is helpful for organizational use mainly because it can be used to segment a larger network into smaller segments.

How does VLAN reduce network traffic?

Just as Ethernet switches isolate and create separate collision domains, VLANs isolate and create separate broadcast domains, helping to reduce network traffic since broadcasts are contained within the VLAN. Devices on other VLANs will not hear these broadcasts, which reduce traffic and increase network performance.

Is VLAN 1 Native VLAN?

By default, Native VLAN is VLAN 1, but it can be changed to any VLAN. Traffic will be sent when both Default and Native VLAN are the same. Traffic can be sent irrespective of Default and Native VLAN being the same or different. Default VLAN is specified through the VLAN operand command.

How do VLANs improve performance?

A VLAN creates a logical broadcast domain that can span multiple physical LAN segments. VLANs improve network performance by separating large broadcast domains into smaller ones. If a device in one VLAN sends a broadcast Ethernet frame, all devices in the VLAN receive the frame, but devices in other VLANs do not.

How can two VLANs communicate?

Two separate VLANs must communicate through a layer-3 device, like a router. Devices on a VLAN communicate with each other using layer-2. Layer-3 must be used to communicate between separate layer-2 domains.

What are three advantages of VLAN?

VLANs provide a number of advantages, such as ease of administration, confinement of broadcast domains, reduced broadcast traffic, and enforcement of security policies.

What is VLAN and how it works?

Has a flexible network model.

  • Only a new port-level configuration is required.
  • A single VLAN can be used as an independent LAN.
  • A VLAN can span multiple switches.

    • What is the purpose of VLAN?

    VLANs enable logical grouping of end-stations that are physically dispersed on a network.

  • VLANs reduce the need to have routers deployed on a network to contain broadcast traffic.
  • Confinement of broadcast domains on a network significantly reduces traffic.

    • What exactly is a VLAN?

    – Physical switch is set to TRUNK mode – dot1q encapsulation is enabled – Spanning-tree is set to portfast trunk (for example, port forwarding, skips other modes) – Define VLAN interface – Assign IP Range to VLAN interface – VLAN Routing – and VLAN Isolation Caution: Native VLAN ID on ESXi/ESX VST Mode is not supported.

    What is the difference between VLAN and Lan?

    VLAN delivers better performance when compared to traditional LANs.

  • VLAN requires less network administration work when compared to LANs.
  • VLAN helps to reduce costs by eliminating the need for expensive routers unlike LANs.
  • Data transmission on VLAN is safe when compared to traditional LANs.