What is VPN?
A VPN or Virtual Private Network is a private, secure, communication tunnel between two or more devices across a public network such Internet. There are more and more free VPN for use today. One benefit derived from using a VPN is that the “tunnel" protects your data from being “overheard" as it passes over the public Internet. Another is that, when using a VPN connection, your computer “appears" on the campus network as if it were on campus.
These VPN devices can be either a computer running VPN software or a special device like a VPN enabled router and allows your home computer to be connected to your office network or can allow two home computers in different locations to connect to each over the Internet.
For security it uses features like encryption, encapsulation, authorization and tunnels. VPN have great secure level because encryption is very strong from 128bit - 2048bit and that is the main reason why they becoming increasingly popular with their many benefits.
A VPN server is a piece of hardware or software that can acts as a gateway into a whole network or a single computer. It is generally always available and listening for VPN clients to connect to it. This enables any user to access a Private Network securely from anywhere in the world as long as an internet connection is available and the private network provides the user the access to its resources. VPN also allow employees to access information from remote locations, making collaboration possible even when employees are scattered around the globe which can significantly reduce costs of any company.
Types Of VPN
Several computer network protocols have been implemented specifically for use with VPN tunnels. The most popular VPN tunneling protocols are PPTP, L2TP and IPsec.
Point to point tunneling protocol (PPTP) is an extension of the pre-existing PPP or point to point protocol. It is the technology that allows the private transmission of data via a public network such as the internet. PPTP is best suited for the remote access applications of VPNs, but it also supports LAN internet-working.
The Layer 2 Tunnel Protocol (L2TP) is an emerging Internet Engineering Task Force (IETF) standard that combines the best features of two existing tunneling protocols: Cisco's Layer 2 Forwarding (L2F) and Microsoft's Point-to-Point Tunneling Protocol (PPTP).
IPsec (Internet Protocol Security) is a security protocol that provides encryption and authentication over the Internet. It can be used as a complete VPN protocol solution or simply as the encryption scheme within L2TP or PPTP.
Who typically uses a VPN?
1. You use the Internet at hotels or other shared hospitality or public networks.
2. You live in, or are visiting, a country that blocks Skype or other VoIP services.
3. You live in, or are visiting, a country that engages in Internet censorship or monitoring of content.
4. You wish to encrypt your VoIP traffic.
5. You want to use a service or application that is geographically restricted by IP address.
6. You simply desire extra privacy and security and want to round out your firewall and anti-virus protection for a complete security solution.
7. You have a company-issued VPN but don’t wish to use it for personal business. When you use your employer’s VPN, typically all your online activity is tracked by default. Also, using your employer’s bandwidth and IP addresses for personal business is likely to be a violation of your company’s policies.
Where can I get a free VPN?
Vpnsurfing.com is a free VPN and VOIP guide blog. You can find uptodate free vpn by visiting Vpnsurfing.com.