Many organisations are now looking at virtual private networks (VPNs) as a low-cost alternative to expensive leased lines.
A VPN is a way to use the internet to provide remote offices or individual users with secure access to their organisation's network.
In contrast to leased lines, VPNs provide the same capabilities but use public infrastructure, maintaining privacy through the use of stringent security measures and tunnelling protocols.
These protocols encrypt data at the sending end and decrypt at the receiving end. Data that is not properly encrypted will not enter the tunnel.
Further security measures include encrypting the network addresses at both ends of the tunnel.
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