I
NTRODUCTION
1-5
• Point-to-Point Tunneling Protocol – Provides a secure tunnel for
remote client access to a PPTP security gateway. PPTP includes
provisions for call origination and flow control required by ISPs.
• Layer Two Tunneling Protocol – Includes most of the features
provided by PPTP, but has less overhead and is more suited for
managed networks.
• IP Security – Provides IP network-layer encryption. IPSec can
support large encryption networks (such as the Internet) by using
digital certificates for device authentication.
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