Benefits of VLANs?

62,125 pts.
Tags:
Network speed
Throughput
Virtual LAN
VLAN
Wireless in 2010
What are virtual lans or vlans? What are they used for and will they allow me to increase my networks overall speed and throughput ratio?
ASKED: August 16, 2010  2:45 PM
UPDATED: August 16, 2010  3:30 PM

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A VLAN (Virtual Local Area Network) is a logical collection of devices that are grouped together to control broadcast, unicast and multicast traffic in layer 2 devices, such as an ethernet switch. VLANs can be locally significant or be trunked over multiple layer 2 devices.

VLANs provide the following benefits:

Security – Separating systems that have sensitive data from the rest of the network decreases the chances that people will gain access to information they are not authorized to see.

Performance/Bandwidth – Careful monitoring of network use allows the network administrator to create VLANs that reduce the number of router hops and increase the apparent bandwidth for network users.

Broadcasts/Traffic flow – Since a principle element of a VLAN is the fact that it does not pass broadcast traffic to nodes that are not part of the VLAN, it automatically reduces broadcasts. Access lists provide the network administrator with a way to control who sees what network traffic. An access list is a table the network administrator creates that lists which addresses have access to that network.

Departments/Specific job types – Companies may want VLANs set up for departments that are heavy network users (such as multimedia or engineering), or a VLAN across departments that is dedicated to specific types of employees (such as managers or sales people).

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  • RichardCooper
    VLANs has many benefits, like flexibility. I came across a page that discusses Virtual LANs through a page and with a video as well in connection with Ozeki Phone System XE. http://www.ozekiphone.com/what-is-vlan-342.html
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