CrazyEngineers Archive
Old, but evergreen and popular discussions on CrazyEngineers, presented to you in read-only mode.
@Vila • 24 Oct, 2009
Hi everybody,

What is the difference between Virtual Private Network (VPN) and Virtual Local Area Network (VLAN) ? When does a company/organization uses VPN and when it uses VLAN? And how to set up a VPN and VLAN ?

Thank you.
@durga ch • 26 Oct, 2009 Hi

VPN
more of you trying to access a different LAN(say LAN1) through a different Network ( LAN2)all together. You would be needing VPN access softwares (infact client and authentication) is needed for you to 'remotely' access the computers on the other networks.

where as in a VLAN, you pick few computers and create something called as a virtual LAN covering them . They need not be belonging to same LAN.The systems can be grouped on any of the layers. ie MAC layer/Network Layer/IP layer. This technology ( as far as I know) is put into telco companies replacing the normal ATM switches. Thus in telco sense, instead of VCI/VPI values, you would rather be talking about VLAN IDs.
@Rahul Jamgade • 15 Dec, 2009 Hi ,

Here are the details,

VLAN: It is group of computers that can have same broadcast domain. So the group of computers in that particular VLAN can directly talk to each other . It is generally used when you need to have separae set of computers to whom you can't directly talk from outside the VLAN and need special permission to get access to the resources in the VLAN generally via ACL (access control list).

VPN: It is used to communicate is a secure way in a non-secure environment. If you want your computer in one network to communicate to another computer in some snother network than they teh communicate has to happen over internet which is insecure medium. And hence teh packets are are transeferd over a encrypted channel (tunnel) between teh two computers so that person sitting on internet cannot sniff/decode the packet.
3.4k views

Related Posts

@Kaustubh Katdare · Apr 18, 2015

Google's Project Loon, as you may already know, is an ambitious project to deliver the Internet around the world using tens of thousands of balloons floating in the sky. According...
5.7k views

@AbhinavDiwan · Dec 26, 2009

I am 3rd year b.e. (ece) student. I am greatly interested in field of microprocessors and programming. I want to do m.tech. Which branch suits to my interest?
3.6k views

@Guneet Khanuja · May 9, 2014

Voonik is a Chennai-based startup that has brought a personal shopping platform to life. Currently acting as your shopping assistant to help you dress well and well within your budget,...
10.5k views

@Ankita Katdare · Dec 15, 2013

Suzuki Motorcycle India Ltd (SMIL) has planned to launch its new street bike - the Suzuki Inazuma GW250 in India in January next year. To be assembled in SMIL's Gurgaon...
5k views

@Ankita Katdare · Jun 22, 2015

​ When I first heard about the HDMI dongle developed by an Indian startup (aka Mango Man Consumer Electronics Pvt. Ltd based out of Bangalore), I was pleasantly surprised. Teewe...
4.2k views