This document discusses VPN (Virtual Private Network) technology. It begins by defining a VPN as a private network that uses a public network like the Internet to connect remote sites or users together. It notes that VPNs offer cost savings, network scalability, and security. The document then discusses remote access VPNs for connecting individual computers and site-to-site VPNs for connecting two networks. It describes some key VPN security components like encryption, authentication, keys, and intrusion detection firewalls. Finally, it speculates on the growing popularity and future of VPN technology for businesses and communication.

1. VPN
(Virtual Private Network)
Bijaya Khadka
College for Professional Studies
B.Sc IT VI
100115431,

2. Secure
low Cost
Head office in Maitedevi Branch office in Lalitpur

3. TRADITIONAL CONNECTIVITY
Cost?
Security?
Scability?

4.  A VPN is a private network that uses a public network
(usually the Internet) to connect remote sites or users
together.
VPN offers two main advantages over alternative technologies:
o Cost savings
o Network scalability
oSecure
VPN: WHAT IS IT?

5. VPN: WHAT IS IT?

6. TYPES OF VPN
 remote-access (connecting an individual computer to a network)
 site-to-site (connecting two networks together).

7. REMOTE ACCESS

8. SITE TO SITE VPN

9. VPN SECURITY

10. VPN SECURITY COMPONENT
 VPN Tunneling
 Encryption
 Authentication
 Keys
 Intrusion detection firewalls

11. VPN SECURITY COMPONENT
 Encryption
 Technique for scrambling and unscrambling information
 Unscramble – called clear-text
 Scrambled information – cipher-text
 Authentication
 Determine if the sender is the authorized person and if
the data has been redirect or corrupted
 User/System Authentication
 Data Authentication

12. VPN SECURITY COMPONENT
 Intrusion detection firewalls
 Monitors traffic crossing network parameters and
protects enterprises from unauthorized access
 Packet-level firewall checks source and destination
 Application-level firewall acts as a host computer
between the organization’s network and the Internet

13. FUTURE OF VPN
 VPN popularity
 Companies choosing VPN
 Cost efficient?
 New way of communicating?

14. Thank You