Virtual Private Networks
Abdullah Alsadoun
Sugair Alsugair
Contents 1/2
Introduction.
Comparison between VPN and Intranet.
VPN topology.
Business Case for Using VPN.
Urban design.
An overview of how VPN works.
Contents 2/2
Functions of layers.
Protocols.
Types of Implementation.
Device types.
Pros and cons.
Introduction
What is VPN?
How did it started?
Comparison between VPN and
Intranet
VPN Intranet
When confidential data is When most users are in
needed to be hosted. offices of one company.
When an application is When customers want to
not particularly time- do VoIP.
sensitive.
When rapid scalability or When customers want a
flexibility is required. customised security
profile.
VPN topology
Business Case for Using VPN
Shared facilities may be cheaper.
Can rapidly link enterprise offices.
Allow customization of security and
quality of service.
Can scale to meet sudden demands.
Can reduce operational expenditure.
Urban design
Customer Edge Device (CE).
Provider Edge Device (PE).
Provider Device (P).
An overview of how VPN works
Two connections.
Datagrams.
Firewalls.
Protocols.
VPN Basic Architecture
Functions of layers
Authentication.
Access control.
Confidentiality.
Data Integrity.
Protocols
PPTP, L2TP, IPsec and SOCKS
Types of Implementation
Intranet – Within an organization.
Extranet – Outside an organization.
Remote Access – Employee to
Business.
Device types
Hardware.
Firewall.
Software.
Pros and Cons 1/2
Pros:
Cost Savings.
Scalability.
Pros and Cons 2/2
Cons:
require an understanding of public network
security issues.
Availability and performance depends on
factors largely outside of their control.
Immature standards.
VPNs need to accommodate protocols
other than IP and existing internal network
technology.
The END
Thank you all
Any questions