Table of Contents
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Tunneling Defined
Tunneling Explained
Tunneling Illustrated
Tunneling Illustrated
Tunneling Illustrated
Tunneling Illustrated
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What Is an IP VPN ?
Types of IP VPN Services
One way to communicate…
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Internet as Backbone: Dial-Up
Internet as Backbone: Branch Offices
Shared Dial Networking
Virtual Private Networks
Types of Tunnels
Voluntary Tunnels
A Voluntary PPTP Tunnel
Compulsory Tunnels
Compulsory Tunnels
A Compulsory L2TP Tunnel
RADIUS Support for Tunnels
RADIUS Dial Up Security
Protocol Comparison
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Q: What is a virtual private network?
Q: What are the elements to a VPN?
Q: How do companies use VPNs?
Q: Is a VPN the same thing as an extranet?
Q: Then what is an extranet?
Q: How is this different from a VPN?
Q: Why bother with a VPN, aren't there
other ways to give users secure access to network resources?
Q: What are other methods for accessing
network resources over the Internet?
Q: Why do companies use VPNs?
Q: How does a VPN cut long distance phone
charges?
Q: How do VPNs help reduce the number
of access lines.
Q: How can a VPN save operational costs?
Performance Issues
Q: What about VPN performance?
Q: What are the concerns about network
availability?
Q: What can be done to ease concerns
about network availability?
Q: How good are the network availability
service level agreements (SLAs)?
Q: What are the short-comings of these
SLAs?
Q: What about latency?
Q: Are there other issues that will prevent
latency-related VPN SLAs?
VPN Technology Questions
Q: What are the common tunneling protocols?
Q: What types of encryption can be used
in VPN applications.
Q: How are VPN users authenticated?
Q: Can user access and authentication
be linked to existing access control systems?
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