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How Secure Is Your Wireless Network? Safeguarding Your Wi-Fi LAN by CCNA Lee Barken - CISSP MCP, CPA

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Choosing an Authentication Protocol

When choosing between PPTP and L2TP, keep in mind the following:

  • Client support: PPTP is supported by a much larger range of clients.

  • Ease of installation: L2TP/IPSec requires a PKI infrastructure to supply the client and server certificates. This significantly increases the cost and complexity of the deployment. Certificates are not required for a PPTP solution unless you are using EAP-TLS. This makes PPTP deployments significantly easier than L2TP.

  • Level of security: PPTP provides only data confidentiality (encryption), while L2TP/IPSec provides data confidentiality, integrity, and authentication. Data integrity validates that packets have not been modified in transit. Data authentication validates the authenticity ...

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