Virtual private networks, or VPNs, are useful and convenient things. Road warriors use them to connect to their home networks securely while traveling; geographically dispersed organizations use them ...
In Figure 10-1, remote access users at an Internet caf , airport Internet kiosk, and a hotel access the corporate network using variously HTTPS, POP3S, SMTPS, and port forwarding (TCP-based ...
VPNs date back to the 1990s when the public internet lacked almost any form of security, and the technology was developed to provide secure and cost-effective connections across this insecure ...
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