A VPN is a network of computers that are all connected securely even though they're in different locations, using different connection methods. The biggest benefit to a VPN is that all of the computers on one network are securely connected to each other with their traffic encrypted and data kept away from prying eyes. Another benefit is that the networked machines, irregardless of their proximity, communicate as if they were right next to one another or plugged in to the same router.
Businesses use VPNs to connect remote datacenters, and individuals may use VPNs to gain access to network resources when they're not physically on the same LAN (local area network). Some might use it as means for securing and encrypting their communications when using an untrusted public network.
Most VPNs rely on tunneling to create a private network that reaches across the Internet.
VPNs will not make online connections completely anonymous but will increase privacy and security.
To prevent disclosure of private information, VPNs typically allow only authenticated remote access and make use of encryption tools.
The VPN security model provides:
- Confidentiality, such that even if the network traffic is sniffed at the packet level an attacker would be confronted with encrypted data
- Sender authentication to prevent unauthorized users from accessing the VPN
- Message integrity to detect any instances of tampering with transmitted messages
There are an ever increasing and changing cast of VPN service providers with a broad range of service quality some of the. When selecting a service users should be aware that speed of connection varies between providers; some keep more detailed logs of users' internet use than others (some claim not keep any logs at all); and some offer SOCKS5 proxy connection options. Those looking for a VPN service should also pay attention to the host nation in which the provider is located - the security of your data may depend upon the location of the host server.
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