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Virtual Private Networks (VPN) - page 5 / 21

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http://sce.uhcl.edu/yang/teaching/.../VPN.ppt

5

Encrypted vs Nonencrypted VPNs

In encrypted VPNs, encryption mechanisms are used to secure the traffic across the public network.

Example: IPsec VPNs

In nonencrypted VPNs, either data security is not ensured at all, or is ensured by other means (including encryption at higher layers).

Examples:

MPLS VPNs (Multiprotocol Label Switching)

cisco white paper

GRE-based VPNs (ch. 11)

Uses higher layer encryption for confidentiality

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