VPN is a secure network connection that is layered on top of a public network, such as the Internet.

This type of connection makes use of the Internet's infrastructure to move secure data to and from the campus network.

This service uses the PPTP protocol, which is supported by Microsoft's modern operating systems as well as other PPTP compliant clients for Macintosh and Linux.

The virtual private network (VPN) technology included in Windows Server 2003 helps enable cost-effective, secure remote access to private networks.

VPN allows administrators to take advantage of the Internet to help provide the functionality and security of private WAN connections at a lower cost. In Windows Server 2003, VPN is enabled using the Routing and Remote Access service.

VPN is part of a comprehensive network access solution that includes support for authentication and authorization services, and advanced network security technologies.

There are two main strategies that help provide secure connectivity between private networks and enabling network access for remote users.

Dial-up or leased line connections

A dial-up or leased line connection creates a physical connection to a port on a remote access server on a private network.

However, using dial-up or leased lines to provide network access is expensive when compared to the cost of providing network access using a VPN connection.

VPN connections

VPN connections use either Point-to-Point Tunneling Protocol (PPTP) or Layer Two Tunneling Protocol/Internet Protocol security (L2TP/IPSec) over an intermediate network, such as the Internet.

By using the Internet as a connection medium, VPN saves the cost of long-distance phone service and hardware costs associated with using dial-up or leased line connections.

A VPN solution includes advanced security technologies such as data encryption, authentication, authorization, and Network Access Quarantine Control.

Answered by Yash , an ibibo Master, at 6:48 PM on June 30, 2008

well, The virtual private network (VPN) technology included in Windows Server 2003 helps enable cost-effective, secure remote access to private networks. VPN allows administrators
to take advantage of the Internet to help provide the functionality and security of private WAN connections at a lower cost. In Windows Server 2003, VPN is enabled using the Routing and Remote Access service. VPN is part of a comprehensive network access solution that includes support for authentication and authorization services, and advanced network security technologies.

There are two main strategies that help provide secure connectivity between private networks and enabling network access for remote users.

Dial-up or leased line connections
A dial-up or leased line connection creates a physical connection to a port on a remote access server on a private network. However, using dial-up or leased lines to provide network access is expensive when compared to the cost of providing network access using a VPN connection.

Remote Access VPN
Remote access VPN connections enable users working at home or on the road to access a server on a private network using the infrastructure provided by a public network, such as the Internet. From the user’s perspective, the VPN is a point-to-point connection between the computer (the VPN client) and an organization’s server. The exact infrastructure of the shared or public network is irrelevant because it appears logically as if the data is sent over a dedicated private link.

Site-to-Site VPN
Site-to-site VPN connections (also known as router-to-router VPN connections) enable organizations to have routed connections between separate offices or with other organizations over a public network while helping to maintain secure communications. A routed VPN connection across the Internet logically operates as a dedicated WAN link. When networks are connected over the Internet, as shown in the following figure, a router forwards packets to another router across a VPN connection. To the routers, the VPN connection operates as a data-link layer link.

Source Site could give you more information :

http://technet2.microsoft .c om/windowsserver/en/library/bc 5c01e a-189e-4d86-a9b7-d426ac80c8a21 033.m spx?mfr=true

Answered by Romi , an ibibo Master, at 7:19 PM on June 20, 2008

Hi there

The VPN is a secure network connection that is layered on top of a public network, such as the Internet.

This type of connection makes use of the Internet's infrastructure to move secure data to and from the campus network.

This service uses the PPTP protocol, which is supported by Microsoft's modern operating systems as well as other PPTP compliant clients for Macintosh and Linux.

The virtual private network (VPN) technology included in Windows Server 2003 helps enable cost-effective, secure remote access to private networks.

VPN allows administrators to take advantage of the Internet to help provide the functionality and security of private WAN connections at a lower cost. In Windows Server 2003, VPN is enabled using the Routing and Remote Access service.

VPN is part of a comprehensive network access solution that includes support for authentication and authorization services, and advanced network security technologies.

There are two main strategies that help provide secure connectivity between private networks and enabling network access for remote users.

Dial-up or leased line connections

A dial-up or leased line connection creates a physical connection to a port on a remote access server on a private network.

However, using dial-up or leased lines to provide network access is expensive when compared to the cost of providing network access using a VPN connection.

VPN connections

VPN connections use either Point-to-Point Tunneling Protocol (PPTP) or Layer Two Tunneling Protocol/Internet Protocol security (L2TP/IPSec) over an intermediate network, such as the Internet.

By using the Internet as a connection medium, VPN saves the cost of long-distance phone service and hardware costs associated with using dial-up or leased line connections.

A VPN solution includes advanced security technologies such as data encryption, authentication, authorization, and Network Access Quarantine Control.

Answered by Reeta K , an ibibo Master, at 10:39 AM on June 05, 2008

The VPN is a secure network connection that is layered on top of a public network, such as the Internet. ICT provides a VPN service to the College. This type of connection makes use of the Internet's infrastructure to move secure data to and from the campus network. This service uses the PPTP protocol, which is supported by Microsoft's modern operating systems as well as other PPTP compliant clients for Macintosh and Linux.

Answered by Om Prakash , an ibibo Master, at 6:31 PM on June 04, 2008

VPN is a secure network connection that is layered on top of a public network, such as the Internet.

This type of connection makes use of the Internet's infrastructure to move secure data to and from the campus network.

This service uses the PPTP protocol, which is supported by Microsoft's modern operating systems as well as other PPTP compliant clients for Macintosh and Linux.

The virtual private network (VPN) technology included in Windows Server 2003 helps enable cost-effective, secure remote access to private networks.

VPN allows administrators to take advantage of the Internet to help provide the functionality and security of private WAN connections at a lower cost. In Windows Server 2003, VPN is enabled using the Routing and Remote Access service.

VPN is part of a comprehensive network access solution that includes support for authentication and authorization services, and advanced network security technologies.

There are two main strategies that help provide secure connectivity between private networks and enabling network access for remote users.

Dial-up or leased line connections

A dial-up or leased line connection creates a physical connection to a port on a remote access server on a private network.

However, using dial-up or leased lines to provide network access is expensive when compared to the cost of providing network access using a VPN connection.

VPN connections

VPN connections use either Point-to-Point Tunneling Protocol (PPTP) or Layer Two Tunneling Protocol/Internet Protocol security (L2TP/IPSec) over an intermediate network, such as the Internet.

By using the Internet as a connection medium, VPN saves the cost of long-distance phone service and hardware costs associated with using dial-up or leased line connections.

A VPN solution includes advanced security technologies such as data encryption, authentication, authorization, and Network Access Quarantine Control.

Answered by Ram Singh , an ibibo Master, at 6:52 AM on June 04, 2008

Hi,

Well The VPN is a secure network connection that is layered on top of a public network, such as the Internet.

This type of connection makes use of the Internet's infrastructure to move secure data to and from the campus network.

This service uses the PPTP protocol, which is supported by Microsoft's modern operating systems as well as other PPTP compliant clients for Macintosh and Linux.

The virtual private network (VPN) technology included in Windows Server 2003 helps enable cost-effective, secure remote access to private networks.

VPN allows administrators to take advantage of the Internet to help provide the functionality and security of private WAN connections at a lower cost. In Windows Server 2003, VPN is enabled using the Routing and Remote Access service.

VPN is part of a comprehensive network access solution that includes support for authentication and authorization services, and advanced network security technologies.

There are two main strategies that help provide secure connectivity between private networks and enabling network access for remote users.

Dial-up or leased line connections

A dial-up or leased line connection creates a physical connection to a port on a remote access server on a private network.

However, using dial-up or leased lines to provide network access is expensive when compared to the cost of providing network access using a VPN connection.

VPN connections

VPN connections use either Point-to-Point Tunneling Protocol (PPTP) or Layer Two Tunneling Protocol/Internet Protocol security (L2TP/IPSec) over an intermediate network, such as the Internet.

By using the Internet as a connection medium, VPN saves the cost of long-distance phone service and hardware costs associated with using dial-up or leased line connections.

A VPN solution includes advanced security technologies such as data encryption, authentication, authorization, and Network Access Quarantine Control.

Answered by Ajay Pal , an ibibo Master, at 3:38 PM on June 03, 2008

hi vimal
A virtual private network (VPN) is a computer network in which some of the links between nodes are carried by open connections or virtual circuits in some larger network (e.g., the Internet) instead of by physical wires. The link-layer protocols of the virtual network are said to be tunneled through the larger network when this is the case. One common application is secure communications through the public Internet, but a VPN need not have explicit security features, such as authentication or content encryption. VPNs, for example, can be used to separate the traffic of different user communities over an underlying network with strong security features.

A VPN may have best-effort performance, or may have a defined service level agreement (SLA) between the VPN customer and the VPN service provider. Generally, a VPN has a topology more complex than point-to-point. The distinguishing characteristics of VPNs are not security or performance, but that they overlay other network(s) to provide a certain functionality that is meaningful to a user community
this is taken from source http://en.wikipedia.org/wiki/Virtua l_private_network

Answered by raj u , an ibibo Master, at 12:53 PM on June 03, 2008

The VPN is a secure network connection that is layered on top of a public network, such as the Internet. This type of connection makes use of the Internet's infrastructure to move secure data to and from the campus network. This service uses the PPTP protocol, which is supported by Microsoft's modern operating systems as well as other PPTP compliant clients for Macintosh and Linux.

A VPN has some advantages and disadvantages are:

Advantages :

* Allows you to be at home and access your company's computers in the same way as if you were sitting at work.
* Almost impossible for someone to tap or interfer with data in the VPN tunnel.
* If you have VPN client software on a laptop, you can connect to your company from anywhere in the world.

Disadvantages :

* Setup is more complicated than less secure methods. VPN works across different manufacturers' equipment, but connecting to a non-NETGEAR product will add to difficulty, since there may not documentation specific to your situation.
* The company whose network you connect to may require you to follow the company's own policies on your home computers ( ! )

If you want to setup your VPN Connection you should have to follow these steps :

To set up a connection to a VPN, do the following:

1. On the computer that is running Windows XP, confirm that the connection to the Internet is correctly configured.

* You can try to browse the internet
* Ping a known host on the Internet, like yahoo.com, something that isn’t blocking ICMP
2. Click Start, and then click Control Panel.
3. In Control Panel, double click Network Connections
4. Click Create a new connection in the Network Tasks task pad
5. In the Network Connection Wizard, click Next.
6. Click Connect to the network at my workplace, and then click Next.
7. Click Virtual Private Network connection, and then click Next.
8. If you are prompted, you need to select whether you will use a dialup connection or if you have a dedicated connection to the Internet either via Cable, DSL, T1, Satellite, etc. Click Next.
9. Type a host name, IP or any other description you would like to appear in the Network Connections area. You can change this later if you want. Click Next.
10. Type the host name or the Internet Protocol (IP) address of the computer that you want to connect to, and then click Next.
11. You may be asked if you want to use a Smart Card or not.
12. You are just about done, the rest of the screens just verify your connection, click Next.
13. Click to select the Add a shortcut to this connection to my desktop check box if you want one, if not, then leave it unchecked and click finish.
14. You are now done making your connection, but by default, it may try to connect. You can either try the connection now if you know its valid, if not, then just close it down for now.
15. In the Network Connections window, right-click the new connection and select properties. Let’s take a look at how you can customize this connection before it’s used.
16. The first tab you will see if the General Tab. This only covers the name of the connection, which you can also rename from the Network Connection dialog box by right clicking the connection and selecting to rename it. You can also configure a First connect, which means that Windows can connect the public network (like the Internet) before starting to attempt the ‘VPN’ connection. This is a perfect example as to when you would have configured the dialup connection; this would have been the first thing that you would have to do. It's simple, you have to be connected to the Internet first before you can encrypt and send data over it. This setting makes sure that this is a reality for you.
17. The next tab is the Options Tab. It is The Options tab has a lot you can configure in it. For one, you have the option to connect to a Windows Domain, if you

Answered by Rupesh , an ibibo Citizen, at 12:24 PM on June 03, 2008

(Virtual Private Network) A private network that is configured within a public network (a carrier's network or the Internet) in order to take advantage of the economies of scale and management facilities of large networks. VPNs are widely used by enterprises to create wide area networks (WANs) that span large geographic areas, to provide site-to-site connections to branch offices and to allow mobile users to dial up their company LANs.

For years, common carriers have built VPNs that appear as a private national or international network to each customer, but, in fact, are sharing the same physical backbone trunks with many customers. VPNs have been built over X.25, Switched 56, frame relay and ATM technologies as well as IP networks. For added security, encryption is often used. See PVC and SVC.

Encrypting data that travels between a remote user and the corporate LAN over the Internet is very popular. It is much more economical than using private, leased lines or making long distance data calls via modem. Today, in fact, many people think that "VPN" and "encrypted connections over the Internet" are synonymous. See computer security and information security.

Answered by Hem@nt , an ibibo Master, at 10:27 AM on June 03, 2008

well, The virtual private network (VPN) technology included in Windows Server 2003 helps enable cost-effective, secure remote access to private networks. VPN allows administrators
to take advantage of the Internet to help provide the functionality and security of private WAN connections at a lower cost. In Windows Server 2003, VPN is enabled using the Routing and Remote Access service. VPN is part of a comprehensive network access solution that includes support for authentication and authorization services, and advanced network security technologies.

There are two main strategies that help provide secure connectivity between private networks and enabling network access for remote users.

Dial-up or leased line connections
A dial-up or leased line connection creates a physical connection to a port on a remote access server on a private network. However, using dial-up or leased lines to provide network access is expensive when compared to the cost of providing network access using a VPN connection.

Remote Access VPN
Remote access VPN connections enable users working at home or on the road to access a server on a private network using the infrastructure provided by a public network, such as the Internet. From the user’s perspective, the VPN is a point-to-point connection between the computer (the VPN client) and an organization’s server. The exact infrastructure of the shared or public network is irrelevant because it appears logically as if the data is sent over a dedicated private link.

Site-to-Site VPN
Site-to-site VPN connections (also known as router-to-router VPN connections) enable organizations to have routed connections between separate offices or with other organizations over a public network while helping to maintain secure communications. A routed VPN connection across the Internet logically operates as a dedicated WAN link. When networks are connected over the Internet, as shown in the following figure, a router forwards packets to another router across a VPN connection. To the routers, the VPN connection operates as a data-link layer link.

Source Site could give you more information :

http://technet2.microsoft .c om/windowsserver/en/library/bc 5c01e a-189e-4d86-a9b7-d426ac80c8a21 033.m spx?mfr=true

Answered by Saurabh , an ibibo Master, at 8:43 AM on June 03, 2008