What is a VPN, why it is needed and how to use it. VPN Connection: What it is, and why you need a VPN channel

To date, it would be useful to consider a few questions related to VPN - what it is what its features and how it is configured.

The fact is that many today do not know anything about this technology, although now such knowledge can be very useful.

Even if you look from a mercantile point of view, then vPN Setup It is worth very good money.

Therefore it would be good simple language explain what is generally VPN and how to customize this technology on Windows 7 and Windows 10, most popular at the moment operating systemsoh.

Basic information

In general, VPN is decrypted as Virtual Private Network, that is, a virtual private network.

If you just say, this is a technology that allows, but not using physical devices, such as switches and routers, but the Internet resources.

In fact, VPN creates one local network over the other.

On the Microsoft website you can find the picture shown in Figure No. 1. It can clearly see what is meant in the phrase "creates one local network over the other."

In practice, everything is happening that way.

In this picture you can see devices in the form of computers. The cloud implies a common or public network, most often this is the most common Internet.

Two servers are connected to each other using VPN.

In this case, these devices are connected to each other and physically. But in practice it is not necessarily.

It is for this that the technology is needed - in order not to use cables and devices, but to do with ordinary technologies that transmit information.

Yes, they also need cables, but for a specific VPN device, they are not required.

Reference: The local network is to combine multiple devices into one network, which allows them to use each other's resources.

As mentioned above, in physical local networks The devices between themselves are connected using optical cables, twisted pairs, radio channels, as well as Wi-Fi, Bluetooth, GPRS, as well as all sorts of devices, such as routers.

So, in virtual networks instead of all this is used the most common Internet connection.

Of course, access various devices It is not just true, there are its identification levels that are aimed at "not to let other people" in a particular VPN network.

And now let's talk in more detail about how the connection is connected to Virtual Private Network.

A little about the structure

There are two parts in the VPN structure: internal and external.

Each individual computer is connected simultaneously to both these parts. This is done using the server.

The server in this case acts on the entrance to the club inlet. He determines who enters the virtual network, and who goes to look for happiness somewhere else.

A computer that connects to a VPN must have with me data for authentication, that is, a one-time password, a smart card or another tool that will allow you to pass this procedure.

For us, this is not particularly important, it is important that there is a authentication process.

To date, specialists of various large companies are developing new ways of authentication.

If you come back to the same example with a facingontline at the entrance to the club, then the person who comes to the club should know:

1. First, its name, which will allow him to pass the identification process;
2. Secondly, he needs to know, for example, a one-time password, which is needed for the passage of authorization.

In the same way, the computer that comes and wants to join one of the VPN networks, "carries" with itself its name with a means of authorization.

The server also enters the above information to its database, in particular, the name of the connected computer.

In the future, "FAYSKONTROL" will no longer require its data from the "client".

In principle, now it should be clear how VPN networks work and that they represent.

In fact, in practical application Everything is much more complicated and, if you want to become specialists on networks, you will need to know quite a lot of information.

In particular, this information concerns VPN varieties.

Classification VPN.

The full classification of this type of technology is shown in Figure 2.

And now we will analyze each type of classifications in more detail.

Classification criteria are:

• Degree of protection. For this criterion, there are such networks:

1. Fully protected - based on initially protected networks;
2. "Trustful" protected - A smaller degree of security is used when the "parent" network has a sufficient degree of reliability.

• Method of implementation. According to this criterion, the following types of networks are distinguished:

1. Hardware, that is, with the help of real devices ( this species Still, slightly departs from the canons of a classic virtual network that does not use all sorts of devices);
2. Software;
3. Combined method.

• Purpose. As part of this criterion, there are the following types of VPN:

1. Intranet. - most often applies to companies where several branches are combined;
2. Extranet. - It is used to organize networks, where there are not only internal corporate participants, and clients;
3. Remote Access. - Used to organize networks in which remote branches are present (one person is most often operated in these branches on a remote basis).

• Via the protocol. Although the VPN implementation is possible using protocols such as IPX and AppleTalk, only TCP / IP is used in practice. The reason is very simple - it is this protocol everywhere applied in the Internet networks and the meaning of "to present the bike" developers simply do not see.
• By level of work. Here, everything corresponds to the classic OSI model, but VPN works only on channel (transmitting information on channels), network (connection) and transport (data transfer) levels.

Of course, in practice, one network embodies several classification signs in itself.

Now let's go directly to how to configure the VPN network using the very conventional computer.

Setting up a virtual network

To begin with, we will understand how it is done on Windows 7.

On this operating system, the configuration occurs with the following relatively simple steps:

• Open the "Network Management Center and common access" To do this, click in the panel quick access On the connection icon with the right mouse button and select the appropriate item in the drop-down menu.

• It is worth saying that the connection icon with the network may not have such a form as shown in Figure No. 3. It may also have such a species that can be seen in Figure No. 4.

• In the window that opens, you must click on the item called the "Nastroeak of a new connection or network" (isolated in Figure No. 5).

• In the window that opens, select the "Connection to Work" item and click the Next button (highlighted in Figure No. 6).

• If any VPN connections are already on this computerThe window shown in Figure No. 7 will appear. In it you need to select "No, create a new connection" and press the "Next" button again.

• In the window that appears, click on the "Use my Internet connection (VPN)" item. There is no "Next" button. There is nothing terrible in this.

• Now you need to enter the address and name. VPN network. As the Connection Window itself itself prompts in Windows 7, you can find it from the network administrator.

If you join some existing network, you need to find out this data from the administrator. This is usually no difficulty.

They are introduced into those fields that are highlighted in Figure No. 9.

• In the same window, you need to check the box opposite the inscription "Do not connect now ...", then click the "Next" button.

• Now it will only be to enter a login and password from the relevant network. The fields for this are highlighted in Figure 10.

If the first connection with the network occurs, you have to create this data, after which the server will check them and in the case of conformity "let" in the network, and you can immediately use it.

If the connection is not happening for the first time, the server will not check them, but immediately "let" in the network immediately.

• After entering the appropriate data, you will simply click the "Connect" button.

• Next will appear in which it will appear the offer to connect to the connected network right now. But it is better to close this window by pressing the corresponding button allocated in Figure No. 11.

Now the setup is completed and only remained to connect to the created network. To do this, it is necessary to go to the "Network Management Center and Common Access Center".

• In the window that opens, select the "Connect to Network" item allocated in Figure No. 12.

• It will remain to select the created connection and press the button selected on the same figure.

So, how to configure the VPN connection on Windows 7, we are already known.

As for Windows 10, there is almost the same algorithm there. Only some elements of the interface and ways of accessing them can differ.

For example, the "Network and Shared Access Control Center" looks almost the same as in Windows 7.

Moreover, there is a very similar point called "Creating and configuring a new connection or network".

In the future, the actions for setting up almost the same, only the interface will be somewhat different.

Disadvantages can only be of those users of Windows 10, which are not so-called classical species, but by the view "Control Panel - homepage"You will need to first go to the" Network and Internet "section, and then select" View network status and tasks "item.

In any case, there is absolutely nothing complicated in the customization procedure and can not be. Interestingly, the VPN connection can be used even on Android devices.

Today Internet users are increasingly using the term VPN. Some recommend using it more often, and others - bypass the side. Consider more detailed, which is hidden behind this term.

VPN connection what it is

VPN. (Virtual Private Network) is technologywhich provides a closed connection with the external access in the presence of a high connection speed. This connection is carried out according to the principle " point - point" In science, this method of connection is called tunnel. You can join the tunnel on PC with any OS, wherein installed VPN client. This program "Presses" the virtual port using TCP / IP. to another network.

To carry out such an connection, you need a platform that is quickly scaled, ensures the integrity, data confidentiality.

In order for the PC with iP address 192.168.1.1-100 Connected through the gateway to the external network, you need to register the rules of the connection on the router. When a VPN connection is performed, the address of the remote PC is transmitted in the title. The message is encrypted by the sender, and is decrypted by the recipient using a common key. After that, a secure connection is established between two networks.

How to connect vpn.

Previously described a brief scheme of the protocol. Now learn how to connect the client on a specific device.

On a computer and laptop

Before configuring VPN. connection by PC with Windows 7, it is necessary specify the IP address or server name. To do this in " Network Management Center" on the " Control panels" need to " Create a new connection».

Select item "" - " (VPN)».

At the next stage, you should specify name and server Address.

You need to wait for the completion of the connection.

Check the VPN connection. To do this in " Control Panel" In chapter " Network connections »Call context menu, double click on the label.

On the tab " Details" need to check iPv4 address. It must be in the IP range specified in the VPN settings.

On the phone, iPhone or tablet

Now consider how to create a VPN connection and configure it on gadgets from Android OS.

This requires:

smartphone, tablet; login, password to network; server address.

To configure the VPN connection, you need to select "" and create a new one in the phone settings.

The screen displays the icon with a new connection.

The system requires a login and password. You need to enter the parameters and select the option "". Then the next session does not have to confirm this data again.

After activating the VPN connection, a characteristic icon appears on the toolbar.

If you click on the icon, the details of the connection will appear.

How to configure VPN for correct work

Consider more detailed how to automatically adjust VPN. On computers S. Windows 10..

Go to PC settings.

In chapter " Parameters»Go to subsection" ".

... and add a new VPN connection.

On the next page, specify the VPN connection settings:

Service Provider - Windows; Connection Name; Server Address; VPN Type; Username and Password.

After the connection is set to it, you need to connect.

How to create a VPN server

All providers record the activities of their customers. If you receive a request from law enforcement agencies, they will provide complete information about which sites visited the offender. Thus, the provider removes all legal responsibility. But sometimes there are situations in which the user needs to protect their data:

Companies transfer their data on the encrypted channel. Many services on the Internet work on geographic binding to the area. For example, Yandex.Music service operates only on IP from the Russian Federation and the CIS countries. The Russian, being in Europe, will not be able to listen to his favorite music. In the offices, access is often blocked social networks.

Of course, it is possible to clean the browser history every time after visiting the site. But it's easier to create and configure a VPN server. You should call command line (Win + R.), and then enter a request nCPA.cpl and press ENTER. In a new window, click Alt. And choose the item "".

Next, you need to create a user and give it limited rights only to VPN. You will also have to come up with a new long password. Select a user from the list. At the next step, you need to select the connection option " Through the Internet" Next, you need to specify the connection parameters. If you do not need access to files and folders when working with VPN, you can remove all ticks and click on the "" button.

How to use VPN.

After a new connection has been created, it is enough to open a browser and download any page. Thenchings may not be engaged in creating a connection, and immediately download a VPN client from the Internet or set a special expansion into the browser. After loading the program, it must be started and press the " Connect." The client will join another network and the user will be able to browse the sites banned in its region. Deadostat this method It is that IP is automatically issued. The user cannot choose the country. But the connection is configured very quickly, by pressing just one button. An option with adding expansion also has drawbacks. First, the user must be registered on the official website of the program, and, secondly, the extension often "crashes". But the user can choose a country through which the external network will be connected. The connection process itself also does not cause questions. Just press the button " Start."And the browser will reboot in new network. Consider how to set the extension on the example Zenmate VPN.. Cook the program from the official site. After installation in the browser, an icon will appear:

Click on the icon. The expansion window will appear:

If you bring the mouse cursor to icon with the Russian flagthen on the screen will appear current IP. If you bring the cursor to the icon with the flag of Romania, the IP of the selected server will appear. If desired, the country's country can be changed. To do this, click on the globe and choose one of the automatic addresses.

Disadvantage free version Programs is a small number of available servers and imposing advertising.

The most frequent mistakes

Various antivirus programs, as well as firewalls can block the connection. In this case, the error code is displayed on the screen. We will analyze the most popular problems and ways to solve them.

Error	Cause	Decision
678	Encryption is prohibited in OS	You need to open the command line and check in the registry "HKEY_LOCAL_MACHINE \\ SYSTEM \\ CURRENTCONTROLSET \\ SERVICES \\ RASMAN \\ PARAMETERS" parameter "Prohibitipsec". It should be equal to 0. If the provider itself uses the encryption channel to provide services, then changes to this setting will affect Internet access.
691	Invalid login / password	Need to log in again on the network
692	Firewall error	Disconnect the firewall
720/738	The user is already connected	Error 720 occurs only on Windows 7. On all other OS reflected code 738. If through one client you have to work with different PCs, then you need to create multiple user names.
734	Automatic VPN	You need to change the type "automatic" to "L2TP IPSEC VPN" in the connection properties. If the error does not disappear, then you need to re-create the connection.
766/781	Not saved / not key	Open the properties of the VPN, on the Safety tab, select the "Advanced Settings" item and enter the key in the new window.
768/789 (Windows 7, Vista, XP)	IPsec does not work	PCM on the "My Computer" label - "Management". In the "Services" section, select "IPsec". Connection type Indicate auto.

Hi friends! Many people use the Internet on the principle of "I have nothing to hide", but it's like saying "I don't care about my rights." This article is for those who do not care about their rights, as well as for those who think about security on the Internet. I'll tell you simple words About what VPN is, why it is needed, as well as how to use it.

What is VPN.

VPN is decrypted as Virtual Private Network. Translated into Russian - a virtual private network. VPN is a technology that provides an encrypted connection over your Internet connection.

Thanks to the VPN, you will be protected from interception of logins / passwords in unprotected or public Wi-Fi points, the history of your sites will not be available to anyone, but you will forget sites like a terrible sleep. This also applies to torrents, and to any other allegedly prohibited sites.

The project of the projects of the "blockers" also reached. Recently, the popular Bitcoins Exchange, a major investment forum and still unknown how many sites was blocked. Block can and access to the site any payment system, for example, to. The benefit that the ridiculous blocking of VPN users do not touch :)

What makes VPN

1. VPN replaces your real IP on a duct, for example, to Italian or Dutch, if you use VPN, then you are practically invisible in the network. You go to the site, but see that you, for example, not from Russia, but from Germany. Due to this, no blocking sites are not terrible.

2. Environment is encrypted - neither your provider nor a sysadmin knows where you came out.
- What does the sysadmin / provider sees at all when you do without VPN? The whole story of your surfing, all the sites, which you come to.
- What does he see when you work via VPN? What you connected via VPN and ... everything, nothing more is not known :)
As well as attackers when intercepting data, they will not be able to recognize them due to encryption.

3. In the amount of IP substitution and traffic encryption, you become completely anonymous.

Why do you need VPN.

• If you like to visit the cafe and sit there online via Wi-Fi or travel and connect and connect to open Wi-Fi Points - No arrogant hacker sitting at the next table, will not capture your plastic card data with CVV code or not password steals From the payment system along with your money. Moreover, it does not matter whether you work from a laptop or from a mobile device - without VNN, they are equally not protected.
• You value anonymity and you have a unpleasant fact that any sysadmin provider has access to visiting sites you visited or from which EPS you replenish / remove large sums. The provider will no longer know which sites you visit, and sites will not know who visited them.
• At work, love to sit on YouTube / Vkontakte / Skype, but do not want this to spoil the boss or sysadmin. I know that you are a successful investor and do not go to work for a long time, this is me, just in case :)
• Want to see the Internet as it should be - to visit sites without restrictions service, which just blocks sites. At the time of writing, more than 2 million sites are blocked (statistics are conducted). It is also not uncommon when you require blocking a specific page or partition, and the provider does not understand the entire site.
• Favorite service restricts access from your country or provides privileges / bonuses / discounts to specific countries? With the help of VPN, become a resident of any country and get all the advantages of the services.

How to use VPN (on the example of NORDVPN)

I myself sit on the Internet only through the VPN and I can recommend an excellent service called NordVPN. I will say right away, the service is paid, the cost of $ 12 per month, when paying for half a year, the cost per month is $ 9, when paying for a year - $ 7.

Yes, on the Internet is full free VPN. Services, but the contents of the servers costs money, so if the service does not take payment from you, he earns at you somehow differently and this "otherwise" can do it much more expensive than paying a reliable VPN. Security is not the question on which it is worth saving.

Overview NORDVPN, its capabilities

• Practically no effect on the connection speed is personally checked :)
• Support for Windows, MacOS X, Linux, Android, iOS;
• The ability to use one account on 6 devices at the same time;
• More than 50 countries and over 500 servers are available to the choice;
• Connect to NORDVPN with one click;
• If your VPN connection disappears, the programs that you specified in the settings will automatically close. You can not worry about the data leakage;
• Protection against recognition via DNS and WEBRTC (these are guys through which your real ip is visible even when VPN is enabled);
• DoubleVPN support (chain of two VPN servers);
• No restrictions: Torrents, Skype calls, HD video, online Games - Everything works without problems;
• Bitcoins and payment through plastic cards. But we love anonymity, so if you have not yet brought yourself a bitcoin wallet, catch the instruction;
• Any requests are ignored, because the service is under the jurisdiction of Panama and does not obey the laws of other countries.

Create an account in NORDVPN

1) Switch by reference, click "Get VPN" and select the tariff.
2) We throw us on the registration form of the account. Select the tariff, fill email and password, select a convenient payment option and click "Register."
3) Confirm payment and go to your personal account using the login and password.

Download the client and turn on the VPN (on the example of Windows)

1) B. personal Cabinet On the site go to the "Download Area" tab, we find our operating system and download the client. If you have Windows, choose a line next to which "Recommended". If you need a VPN on mobile device, find NordVPN in your application store and download.

2) Install the program and run it. The screenshot below shows how the program looks like (the screen is increasing by clicking). In the tab " Servers"You can choose any country for connecting.

Setting up nordvpn.

If you want maximum protection and configure everything, then click on "Settings":

For what every item is responsible:

Automatic Updates - When you enter new versions, update the program automatically;
AUTO CONNECT TO - when starting NordVPN will automatically connect to the selected server;
START NORDVPN on startup - run VPN with the start of the system;
Kill Switch - Select programs that will automatically close if the connection to the VPN will disappear. To select the program, click "Add More Applicatios" and locate on the computer the necessary program, for example, browser and skype;
Notifications - to receive notifications when the connection is connected or disconnected from NordVPN;
Show Tray Icon - Show the program icon in the system tray;
Start Minimized - start in the coarse form;
System of Measurement - Select in the metric (km) or imperial system (mile) to show the distance to the servers.

You learned what VPN is for what it is needed and how to use it. He tried to write the most accessible as possible :) Now your anonymity and high-level safety.
Leave your opinions and questions on the topic of the article in the comments.

In this article we will answer the most fAQ What is a VPN server, can we tell if VPN will increase your security, do you need to use Double VPN and how to check whether VPN service logs, as well as what modern technologies There are to protect personal information.

VPN is a virtual private network that provides encryption between the client and the VPN server.

The main purpose of VPN is the traffic encryption and the change of the IP address.

Let's see for what and when it is necessary.

What is needed vpn

All Internet providers log in the activities of their customers on the Internet. That is, the Internet provider knows which sites you visited. It is necessary in order to give all information about the violating information in the case of requests from the police, as well as to remove all legal responsibility for the user's actions.

There are many situations when the user needs to protect their personal data on the Internet and get freedom of communication.

Example 1. There is a business and it is necessary to transmit confidential data over the Internet so that no one can intercept them. Most companies use VPN technology to transfer information between branches of companies.

Example 2. Many Internet services operate on the principle of geographic binding to the area and prohibit access to users from other countries.

For example, Yandex music service works only for IP addresses from Russia and the countries of the former CIS. Accordingly, the entire Russian-speaking population living in other countries does not have access to this service.

Example 3. Locking certain sites in the office and in the country. Often, the offices block access to social networks so that employees do not spend the working time for communication.

For example, many are blocked in China google services. If a resident of China works with a company from Europe, then there is a need to use such services as Google Disk.

Example 4. Hide visited sites from the Internet provider. There are cases when you need to hide a list of visited sites from the Internet provider. All traffic will be encrypted.

Thanks to the code encryption, your Internet provider does not know which sites you visited on the Internet. At the same time, your IP address on the Internet will belong to the VPN server country.

When connected to the VPN, a secure channel between your computer and a VPN server is created. All data in this channel is encrypted.

Thanks to the VPN, you will get freedom to communicate and protect your personal data.

In the logs of the Internet provider there will be a set of different characters. The picture below shows the analysis of the data obtained by a special program.

In the HTTP header is immediately visible to which site you are connected. This data record Internet providers.

The following picture shows the HTTP title when using VPN.. The data is encrypted and it is impossible to know which sites you visited.

How to connect to VPN

There are several ways to connect to the VPN network.

• PPTP - Outdated Protocol. Most of the modern OS excluded it from the list supported. Cons PPTP - Low connection stability. The connection can be broken and unprotected data can go online.
• L2TP (IPsec) Connection is characterized by greater reliability. Also built in most operating systems (Windows, Mac OS, Linux, iOS, Android, Windows Phone other). It has better reliability in contrast to PPTP connections.
• SSTP Connection was developed relatively recently. It is supported only in Windows, so it did not get much spread.
• IKEV2 is a modern IPSec protocol. This protocol has replaced the PPTP protocol and is supported by all popular OS.
• OpenVPN Connection is considered the most reliable. You can flexibly configure this technology and when the OpenVPN connection drops, blocks the shipment of unprotected Internet data.

There are 2 data transfer protocols for OpenVPN technology:

• UDP protocol - features speed (recommended use for VoIP telephony, Skype, online games)
• TCP protocol - characterized by the reliability of the transmitted data (requires confirmation of the package receipt). It works a little slower than UDP.

How to configure VPN.

The configuration of the VPN connection takes a few minutes and is characterized by the VPN connection method.

On our service we use PPTP and OpenVPN connections.

Safety work with a VPN program

We will always talk about an integrated approach to security. The user security consists not only from the VPN connection itself. It is important which program you use to connect to the VPN server.

Currently, services offer comfortable VPN clientthese are programs that facilitate the configuration of the VPN connection. We offer a convenient VPN client. Thanks to such programs, the connection configuration of the VPN takes no more than 1 minute.

When we just started to engage in the provision of VPN services in 2006, all our users set up the official OpenVPN application. It has open source. Of course, the customer's official OpenVPN setting takes longer. But let's figure it out, the better to enjoy in terms of anonymity.

Anonymity VPN client

We see the danger to using similar programs. The fact is that the source code of such programs is the property of the company and in order to preserve the uniqueness of its program, no one publishes it.

Users cannot find out what data about you collects the program in the absence of an open source code.

VPN programsand can identify you as a specific user even when the logs are turned off on the server.

Any program may have a functionality on the entry of the sites you have visited, your real IP address. And since you ourselves enter your login to the program, then it is impossible to talk about any anonymity of the program.

If your activity needs a high level of anonymity, we recommend that you refuse such VPN programs and use the OpenVPN OpenVPN Release with open source.

First you will seem uncomfortable. But over time you get used to this if the safety and anonymity factor is in the first place.

We guarantee that Secure Kit does not save any data about you. But we need to warn you that such programs can be surrounded by you.

Another idea how to increase your safety has come from the point of view of the geographical location of the servers. On the Internet, it is called offshore VPN.

What is offshore VPN

Different countries have a different level of legislation. There are strong states with strong laws. And there are small countries, the level of development of which does not allow for information protection of data in their own country.

Initially, the concept of offshore was used to designate the country in which the tax policy is mitigated. Such countries have very low business taxes. World companies were interested in legitimate taxation from taxes in their country, and accounts on the Cayman Islands in the offshore bank became very popular.

Currently, in many countries of the world there are already prohibitions for the use of bank accounts in offshore countries.

Most offshore countries are small states located in remote corners of the planet. Servers in such countries find more difficult and cost more due to the lack of developed Internet infrastructure. VPN servers in such countries began to call offshore.

It turns out that the word offshore VPN does not mean anonymous VPN, but only speaks about the territorial accessory to the offshore state.

Should I use offshore VPN?

Offshore VPN presents additional advantages in terms of anonymity.

Do you think much more easier to write an official request:

• to the police department in Germany
• or in the police department to the islands in Antigua-Barbuda

Offshore VPN is an additional level of protection. Offshore server is well used as part of the Double VPN chain.

You do not need to use only 1 offshore VPN server and think that this is complete safety. It is necessary to approach its safety and anonymity on the Internet from different sides.

Use offshore VPN as the link of your anonymity.

And it's time to answer the most frequently asked question. Can an anonymous VPN service lead logs? And how to determine whether the service logs?

Anonymous VPN service and logs. How to be?

Anonymous VPN service should not lead logs. Otherwise, it can not be called anonymous.

We have compiled a list of questions, thanks to which you can accurately determine whether the service logs.

Now you have complete information about VPN connections. These knowledge is enough to make yourself anonymous on the Internet and make a secure transfer of personal data.

New VPN technology

Are there any new directions in the VPN field?

We have already talked about the pros and cons of consistent cascading VPN servers (Double, Triple, Quad VPN).

To avoid minuses of Double VPN technology, you can make a parallel chain cascade. We called it Parallel VPN.

What is Parallel VPN

The essence of Parallel VPN is to send traffic to a parallel data channel.

The disadvantage of serial cascading technology (Double, Triple, Quad VPN) is that the channel decryption and encryption to the next channel occurs on each server. The data is sequentially encrypted.

There are no such problems in Parallel VPN technology, since all data pass double parallel encryption. That is, imagine the bow, which has several peel. In the same way, the data is held in the channel, which is twice encrypted.