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What does Virtual Private Network mean?

A virtual private network (VPN) is a secure network that uses primarily public telecommunication infrastructures, such as the Internet, to provide remote offices or traveling users an access to a central organizational network.

VPNs typically require remote users of the network to be authenticated, and often secure data with firewall and encryption technologies to prevent disclosure of private information to unauthorized parties.

There are two types of VPNs; remote access VPNs and site to site VPNs. Remote access VPNs are for individual users who are not in a fixed location - remote or roaming users like salespeople. Site to site VPNs are for multiple users in a fixed location - like regional offices.

VPNs may serve any network functionality that is found on any network, such as sharing of data and access to network resources, printers, databases, websites, etc. A VPN user typically experiences the central network in a manner that is identical to being connected directly to the central network. VPN technology via the public Internet has replaced the need to requisition and maintain expensive dedicated leased-line telecommunication circuits once typical in wide-area network installations.

Virtual private network technology reduces costs because it does not need physical leased lines to connect remote users to an Intranet.

History and status

Virtual private networks have existed for many years in the form of frame relay based private networks. IP-VPNs have become more prevalent in the communications industry due to significant cost reductions, increased bandwidth, and security. These IP based VPNs will ultimately find their way into almost every network based communications activity that occurs whether it be via cellular to cellular, satellite, site-to-site, or inside corporate local area networks.

Types of VPN

VPN systems can be classified by:

The following sections discuss some classification schemes.

Security mechanisms

Secure VPNs use cryptographic tunneling protocols to provide:

Secure VPN protocols include the following:

Authentication

Tunnel endpoints must authenticate before secure VPN tunnels can be established.

User-created remote access VPNs may use passwords, biometrics, two-factor authentication or other cryptographic methods.

Network-to-network tunnels often use passwords or digital certificates, as they permanently store the key to allow the tunnel to establish automatically and without intervention from the user.

Trusted delivery networks

Trusted VPNs do not use cryptographic tunneling, and instead rely on the security of a single provider's network to protect the traffic.

From the security standpoint, VPNs either trust the underlying delivery network, or must enforce security with mechanisms in the VPN itself. Unless the trusted delivery network runs among physically secure sites only, both trusted and secure models need an authentication mechanism for users to gain access to the VPN.

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Exede Internet availabily was based on: Exede internet is available in almost all areas of United States please call us, your local authorized dealer in High Speed Satellite Internet to talk with an internet specialist today. Exede Satellite Internet Requires a clear view of the southern sky. © 2014 WildBlue Communications, Inc. Service not available in all areas of High Speed Satellite Internet United States. Please call to check for service availability. Minimum 24 month commitment term. One-time setup fee of $149.99 (currently on special for $49.99) and $9.99/month equipment lease apply (or pre-pay a 24-month lease and save almost $40). Actual speeds will vary. Non-standard installations may result in additional charge. Equipment must be returned upon cancellation of service, otherwise unreturned equipment fees apply. Taxes and monthly service fees apply. Prices subject to change. All offers valid for a limited time and may be changed or withdrawn at any time. Requires a clear view of the southern sky. Use of the Exede service is subject to data transmission limits measured on a monthly basis as described in the Data Allowance Policy. For complete details and the Data Allowance Policy, visit www.exede.com. Exede Satellite Internet is a service mark of ViaSat, Inc. This website is owned and operated by an independent distributor of Exede Satellite Internet from ViaSat Communications, Inc. Some content on this website may be copyrighted by ViaSat Communications, Inc.