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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.