The Virtual Private Network
Privacyonline Technology is a term that derives its name from Greek. Technology is the result of engineering and science. It's the way humans use technology to improve their environment. One method is to use tools and machines efficiently. We have seen rapid technological advancements over the years, including podcasts, podcasts and teleconferencing. Virtual Private Network is one of the many technologies.
VPNs are private networks that connect users and remote sites using a public network such as the internet. VPNs use virtual connections that are routed over the internet from the company’s private network to the remote site/employee. VPN traffic can be carried over a public network such as the internet if it follows certain protocols. To enable the creation of a private VPN network, a Service Level Agreement (SLA), is created between the VPN customer & the VPN service provider.
The Advantages of a VPN:
• Increased security and productivity
• Simplified network topology
• Reduced operating and transport costs
• Higher Return on Investment
• Global connectivity
Features:
Reliable
Secure
Scalable
Policy and network management
Types Of VPN:
1. Remote Access VPN
2. Intranet VPN
3. Extranet VPN
Remote access VPN:
Remote access VPN refers to a user-to LAN (Local Area Network), connection that an organization uses to allow remote employees to connect to its private network.
Remote access VPN allows you to save money over toll-free expenditures and it is secure (encrypted Tunnels across a Public Network like the internet). It can also be scaled.
Intranet VPN (interconnecting corporate websites)
Intranet VPN is a cost-saving alternative to dedicated, leased lines. Tunnelled connections are available and encryption is used to ensure reliable throughput.
Extranet VPN (connecting corporate sites to external business partners or suppliers)
Extranet VPN extends WAN to business partners.
Security:
Security is the most important aspect of a VPN solution. VPNs allow private data to be placed on public networks. This raises concerns about data security and data loss. Virtual Private Networks must offer security services in the area of authentication. Authentication is used to verify that a user or system are who they claim to be. This ensures security.
Authentication Mechanisms:
Login name, password, and PIN (password) - a specified number of digits followed 8 bits. This password is subject to regular changes.
A computer-readable token, such as a smart card
Fingerprint, retinal, or iris pattern
Tunneling:
Tunneling can be an important part of VPN. Tunneling is the act of encapsulating a packet in another packet and then sending it over a network. The packet's protocol is understood by the network (such as the internet) and the *tunnel interface.
Tunneling Protocols:
Carrier Protocol – The protocol that is used by the network to transmit the information. Encapsulating protocol the protocol (GRE. *IPSec. L2F. PPTP. L2TP. L2TP.) that wraps around the original data
Passenger Protocol – Original data (IPX. NetBeui. IP) being carried
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