How secure are VPNs compared to LANs, WANs, etc?
Secure VPNs use encryption protocols to provide the necessary confidentiality (preventing snooping), sender authentication (preventing identity spoofing), and message integrity (preventing message alteration) to achieve the privacy over a public IP network. Why would business executives want to move to a VPN, since part of the transmissions go over a public network, such as the Internet? A well-designed VPN provides the same level of security as private networks using low-cost public Internet. That means significant advantages for businesses. For example, it: • Extends geographic connectivity: local, regional, national or global. • Reduces operational costs versus traditional WAN. • Reduces transit time and transportation costs for remote users. • Improves productivity and communications. • Provides telecommuter, mobile user access to corporate network. • Provides faster ROI than traditional carrier-leased or carrier-owned WAN lines. • Shows good economies of scale, as the business add
