Virtual Local Area Networks (VLANs) and Types

1. VIRTUAL LOCAL AREA
NETWORKS (VLANS)
VLAN

2. WHAT ISVLAN ?
 Note
 A single physical network that already exists is divided into several logical
networks using (VLANs).
 Every VLAN creates a separate broadcast domain. Only a router that is
connected to both VLANs can facilitate communication between two separate
VLANs.
 A virtual LAN (VLAN) is a logical overlay network that isolates the traffic for
each group of devices that share a physical LAN.
 Easy to understandVLan Concept தமிழில் .
 https://www.youtube.com/watch?v=e7P59Q1BBQA

4. TYPES
There are five main types ofVLANs
 ManagementVLAN.
 DataVLAN.
 VoiceVLAN.
 DefaultVLAN.
 NativeVLAN.

5. MANAGEMENTVLAN
 A significantly smaller network called a management virtual local area network
(VLAN) is housed inside your main network. Network security is the main
advantage of employing a management VLAN. It is far more difficult for
unauthorized users to observe network traffic or make changes to your network
when all administrative traffic is on a separateVLAN.
 A management VLAN can also provide you with a different access point to your
network, allowing you to lessen the effect of a broadcast storm on otherVLANs.

6. MANAGEMENTVLAN

7. DATAVLAN
 A VLAN that is set up to transmit user-generated traffic is known as a data VLAN.
A voice or management VLAN would not be a component of a data VLAN.
Separating speech and management communication from data transmission is
standard procedure. A userVLAN is another name for a dataVLAN.
 Data VLAN is used to divide the whole network into 2 groups. One group of users
and other group of devices. This VLAN also known as a user VLAN, the data VLAN
is used only for user-generated data. This VLAN carrying data only. It is not used
for carrying management traffic or voice.

8. VOICEVLAN
 A voiceVLAN is aVLAN (virtual local area network) that is dedicated to speech
data streams. It improves the transmission priority of voice communication when
it is transmitted alongside other traffic, ensuring its quality.

9. DEFAULTVLAN
 all switch ports turn into a member of the default VLAN just after the initial
bootup of the switch. All these ports engage in the default VLAN which makes all
of them a part of the same broadcast domain. Because of this, any device
connected to any port can communicate with other devices on other switch ports.
For Cisco and some other vendors,VLAN1 is the defaultVLAN.

10. NATIVEVLAN
 Native VLAN: When untagged traffic is received on a trunk port, it is routed to the
native VLAN. This allows your VLAN to accept legacy devices or devices that do
not identify their traffic, such as wireless access points and network-attached
devices.