22-03-2014, 04:27 PM
VIRTUAL PRIVATE NETWORK for QUALITY of SERVICE
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ABSTRACT
This seminar report is about “VIRTUAL PRIVATE NETWORK for QUALITY of SERVICE”. In this we review today’s corporate networks and how VPN can be used for corporate networking.
These introduce with VPN Technology, its types, and also describe the various components, its need and functioning with its working in detail.
In this we mainly explain the quality of service for virtual private network, so that they explain why quality of service is needed? And its components are described. They provide an introduction to quality of service architecture for VPNs including rich classification, policing, shaping, queuing, and congestion avoidance.
In quality of service how its parameter are reflected from tunnel packets with their types.
In this we detail study about its advantages, disadvantages, features dedicated and benefit of the VPN. Also see how data kept secure with help of IP protocol.
INTRODUCTION
The wide spread migration towards the Internet Protocol creates a golden age for system integrators, network manager who are creating and implementing IP based Internetworking solution.
Employees on business trips need to stay current with their electronic mail. Sales represents in the field must be able to access corporate databases.
Branch offices must be part of the corporate network.
Virtual private networks (VPNs) offer low-cost, secure, dynamic access to private networks. Such access would otherwise only be possible by using an expensive leased line solution or by dialing directly into the local area network (LAN).
VPNs allow remote users to access private networks securely over the Internet. A remote user in one part of the UK can establish a secure network connection using a VPN to a school LAN in another part of the UK and only incur the call cost for the local Internet connection
CORPORATE NETWORK USING VPN :
Companies whose facilities are spilt between two or more location can connect into a single logical network through the use of VPN.
Using the Internet as the communication backbone, and by authenticating and encrypting data transmissions through secure tunnels ,a new level of integration for physically distinct networks can be created. This new technology dubbed as VPN , is an exciting new function that enables distant workgroups to communicate efficiently and securely across the Internet.
What is a VPN?
A virtual private network gives secure access to LAN resources over a shared network infrastructure such as the internet. It can be conceptualised as creating a tunnel from one location to another, with Encrypted data traveling through the tunnel before being decrypted at its destination.
Remote users can connect to their organisation's LAN or any other LAN. They can access resources such as email and documents as if they were connected to the LAN as normal. By using VPN technology it is possible to connect to a school LAN from anywhere in the world via the internet, and to access it securely and privately without incurring the large communication costs associated with other solutions.
How does a VPN work?
A remote access solution works by the remote user first establishing an internet connection to an ISP in the normal way. The user activates the VPN client software to create a tunnel over the internet and to connect to the central LAN’s VPN gateway. The VPN client software then passes its authorization to the VPN gateway. The VPN gateway checks that the user is authorised to connect and then ensures the encryption key from the remote client is valid. All VPN data is encrypted using the key before being transmitted over the internet using a tunneling protocol. It is decrypted at the other end by the VPN gateway, which has an identical set of keys to decrypt the data. Data sent from the central LAN to the remote user is encrypted by the VPN gateway before transmission and decrypted by the remote user’s VPN client software.