What is a VPN?

The following is a small series for everyone to collect the "VPN is what" all content, if you like the small series of recommendations, please continue to pay attention to learning.

The full name of the VPN is virtual private network, which is the meaning of the fictitious private network. Many people do not know what VPN means, in fact, VPN is a temporary security connection through the Internet, is a safe and stable tunnel through the chaotic public network, through this tunnel can securely encrypt the transmission of data, often used to focus on confidentiality of enterprises.

What does a VPN mean? VPN uses the tunneling transport protocol, the current VPN tunneling protocol has three kinds: PPTP,L2TP and IPSec, where the PPTP and L2TP protocols work in the second layer of the OSI model, also known as the two-Layer tunneling protocol, and IPSec is the third-tier tunneling protocol and the most common protocol. The use of L2TP and IPSec is one of the best and most widely used in the current performance.

Knowing what the VPN means, then what is the role of the common mobile VPN for users? Mobile VPN can use VPN server proxy to access the Internet, to achieve the goal of breakthrough restrictions and acceleration. Through the use of mobile VPN, you can access Youtube,twitter,facebook and other domestic web site, you can also successfully load verification gameloft and other parts of the game need to turn over the wall. To use a mobile VPN need to provide VPN service providers there registered users and passwords, there are pay phone VPN also have free, but for the sake of stability, it is best to choose the fee. Free Mobile VPN generally limit traffic and the number of landing at the same time, and some will break off the line. So how do you use a mobile VPN? If you have already applied for a VPN account, see the following tutorial:

The first step: Open the Phone main menu, select "Settings" and then select "Wireless and Network":

The first step: Open the Mobile Phone main menu, select "Settings"

Step Two: Select Virtual private Network settings:

Step Two: Select Virtual private Network Settings

Step three: Select "Add Virtual Private Network":

Step three: Select "Add Virtual Private Network"

Fourth step: Select Add VPNPPTP:

Fourth step: Select "Add VPNPPTP"

Step Fifth: Enter the PPTP connection Setup interface:

Step Fifth: Enter the PPTP connection setup interface

Sixth step: Click Enter the virtual private network Name "PPTP" (this name can be freely defined):

Sixth step: Click Enter the virtual private network name "PPTP"

Seventh Step: Click to fill in the server address you are logged in (users can find the station after the site to obtain the server address list), click "OK" as shown in the figure:

Seventh Step: Click to fill in the server address you are logged in

Eighth step: The DNS search scope can not be filled in, optionally fill in as "8.8.8.8", and then return.

Eighth Step: DNS search scope can not be filled

Step nineth: Click the VPN connection you just created, enter your account number and password, and then click on "Connect