What Is a VPN and How to Use It: A Beginner’s Guide

The internet is an essential part of everyday life, but using public networks can expose your online activity to security and privacy risks. A VPN (Virtual Private Network) is a technology designed to create a more secure connection between your device and another network, often using encryption and tunneling.

According to the U.S. National Institute of Standards and Technology (NIST), a VPN is a virtual network built on top of existing networks that can provide a secure mechanism for transmitting data.

This guide explains what a VPN is, how it works, why people use one, and how to get started.

What Is a VPN?

A Virtual Private Network (VPN) creates an encrypted connection between your device and a VPN server. Instead of sending your internet traffic directly from your device to websites and online services, the traffic is routed through the VPN server.

In simple terms:

Without a VPN:

Your device → Internet → Website

With a VPN:

Your device → Encrypted VPN connection → VPN server → Website

The VPN can help protect traffic between your device and the VPN server, particularly when you're using networks you don't fully trust. NIST notes that VPNs are commonly used to protect communications over public networks such as the internet.

How Does a VPN Work?

A VPN generally works through three basic steps.

1. Your Device Connects to a VPN Server

You first connect your computer, smartphone, or tablet to a VPN server using a VPN application or built-in VPN functionality.

The server may be operated by a commercial VPN provider, your employer, or an organization you belong to.

2. Your Traffic Is Sent Through an Encrypted Connection

The VPN establishes a protected connection between your device and the VPN server. Depending on the VPN technology and configuration, encryption helps prevent people monitoring the local network from reading the protected traffic.

For example, NIST describes VPNs as providing protections such as confidentiality, integrity, authentication, and access control.

3. The VPN Server Connects to the Internet

Once your traffic reaches the VPN server, it is forwarded to its destination.

Websites will generally see the VPN server's IP address rather than the public IP address associated with your original connection.

However, a VPN does not make you completely anonymous. Your VPN provider can potentially have visibility into traffic or connection information, depending on its technology and policies. The Federal Trade Commission (FTC) specifically advises consumers to research VPN providers and understand what information an app collects or shares.

Why Use a VPN?

There are several legitimate reasons to use a VPN.

Protecting Yourself on Public Wi-Fi

Public Wi-Fi networks in places such as airports, hotels, cafés, and other public locations may present additional security risks.

A VPN can encrypt traffic between your device and the VPN server, reducing the ability of someone monitoring the local network to read that protected traffic.

Secure Remote Work

Businesses frequently use VPNs to allow employees to securely connect to internal company systems from outside the office.

For example, an employee working remotely might use a company VPN to access internal applications or files that aren't directly exposed to the public internet. NIST describes VPNs as an important mechanism for securing remote connections to organizational resources.

Changing Your Apparent IP Address

When you connect through a VPN server, websites can generally see the VPN server's IP address rather than your original public IP address.

This can be useful for privacy and for accessing services that are configured around network location. However, it does not guarantee anonymity, and websites can use other methods to identify or track users.

Adding Another Layer of Privacy

A VPN can provide an additional layer of privacy between your device and the local network or internet service infrastructure. However, you are shifting trust toward the VPN provider, so choosing a reputable provider matters.

What a VPN Does Not Do

A VPN is useful, but it isn't a complete cybersecurity solution.

A VPN does not automatically:

• Make you completely anonymous online

• Protect you from phishing websites

• Prevent malware infections

• Make weak passwords secure

• Stop websites from tracking you through cookies or browser fingerprinting

• Guarantee that every website or application is safe

• Protect you if the VPN provider itself has poor security or privacy practices

NIST also emphasizes that VPNs can reduce networking risks but cannot eliminate all risks.

For good security, combine a VPN with strong passwords, multifactor authentication, updated software, secure browsing habits, and reputable security tools.

Types of VPNs

VPN technology is used in several different ways.

Remote-Access VPN

A remote-access VPN connects an individual device to a private network.

This is common in businesses where employees need to securely access internal company resources while working remotely.

Site-to-Site VPN

A site-to-site VPN connects two or more networks.

For example, a company might use a VPN to connect its headquarters with a branch office over the public internet.

IPsec VPN

IPsec (Internet Protocol Security) is a group of protocols and standards used to secure IP communications. NIST's guidance describes IPsec as a common technology for creating VPNs and protecting communications over public networks.

SSL/TLS VPN

SSL/TLS VPNs can provide secure remote access to organizational resources. NIST's guidance explains that these VPNs can use TLS to encrypt communications between users and VPN devices.

How to Use a VPN

Using a consumer VPN is generally straightforward.

Step 1: Choose a Reputable VPN Provider

Research the provider before installing its application.

Look for information about:

• Privacy policies

• Data collection

• Security practices

• Supported devices

• Available VPN protocols

• Independent security audits, where available

• Customer support

• Pricing and subscription terms

Be particularly careful with free VPN applications. The FTC recommends researching a VPN app before downloading it, reviewing its permissions, checking whether it encrypts information, and understanding whether it shares information with third parties.

Step 2: Install the Official VPN App

Download the VPN application from the provider's official website or your device's official app store.

Avoid downloading VPN applications from unknown websites or unofficial sources.

Step 3: Sign In

Open the application and sign in to your account if required.

Some VPN services offer free plans, while others require a subscription.

Step 4: Choose a VPN Server

Most VPN applications display a list of available server locations.

You can typically select:

• A nearby server for potentially better performance

• A server in a particular country or region

• An automatically selected server recommended by the application

A nearby server will often provide lower latency, although actual performance depends on the provider, network conditions, and server load.

Step 5: Connect to the VPN

Click the Connect button in the VPN application.

Once connected, your device should indicate that the VPN connection is active.

At this point, internet traffic covered by the VPN configuration is routed through the VPN connection.

Step 6: Browse Normally

After connecting, you can use your browser and other applications normally.

If you are using a VPN specifically to protect yourself on public Wi-Fi, make sure the VPN is actually connected before transmitting sensitive information.

Step 7: Disconnect When You Are Finished

When you no longer need the VPN, you can disconnect from the application.

Some users choose to keep their VPN connected continuously, while others enable it only when using untrusted networks or accessing specific services.

How to Choose a Good VPN

Choosing a VPN isn't simply about finding the provider with the largest number of servers.

Check the Privacy Policy

Read what information the provider collects, why it collects it, and whether information is shared with third parties.

A VPN provider effectively becomes an important intermediary for your internet traffic, so its privacy practices deserve careful consideration.

Check the Permissions

A VPN application may require significant permissions because of how VPN functionality works.

The FTC recommends reviewing an app's permissions and understanding what information it can access.

Look for Strong Security Practices

Look for providers that clearly explain their security technologies, protocols, encryption, and infrastructure.

Consider Performance

VPN encryption and routing can introduce additional latency and may reduce connection speeds.

If performance matters, compare servers and providers rather than assuming that every VPN will perform the same way.

Don't Choose a VPN Solely Because It Is Free

Free services can be legitimate, but the business model matters.

Before using one, understand how the provider pays for its service and what data it collects. A "free" VPN that monetizes user information may not provide the privacy benefits you expect.

Is a VPN Safe to Use?

A reputable VPN can be a useful security and privacy tool, but the VPN itself needs to be trustworthy.

When you use a VPN application, you are effectively allowing it to handle your network traffic. The FTC warns consumers to consider the privacy and security implications of this arrangement before selecting a VPN app.

The safest approach is to treat a VPN as one part of a broader cybersecurity strategy, rather than as a magic solution for online privacy.

VPN vs. Incognito Mode

VPNs and browser incognito/private modes solve different problems.

Incognito mode primarily limits what your browser stores locally, such as browsing history and some cookies.

A VPN creates a network connection through a VPN server and can encrypt traffic between your device and that VPN server.

Using incognito mode does not replace a VPN, and using a VPN does not replace private browsing features.

Frequently Asked Questions

Does a VPN hide my IP address?

A VPN normally makes websites see the VPN server's public IP address instead of your original public IP address. However, this does not guarantee complete anonymity.

Does a VPN make the internet completely secure?

No. A VPN can protect certain network traffic, but it doesn't protect you from every online threat. Phishing, malware, compromised accounts, unsafe websites, and other risks can still affect you.

Can I use a VPN on my phone?

Yes. Most major VPN providers offer applications for smartphones and tablets.

Does a VPN slow down the internet?

It can. Your traffic has to travel through a VPN server, and encryption and routing can introduce additional overhead. The impact varies considerably by provider, server, protocol, and network conditions.

Should I use a VPN on public Wi-Fi?

A VPN can be useful on public or otherwise untrusted networks because it can protect traffic between your device and the VPN server.

Can a VPN protect me from hackers?

A VPN can reduce certain network-level risks, but it is not a complete defense against hacking. Strong passwords, multifactor authentication, software updates, and cautious behavior remain important.

Final Thoughts

A VPN is a technology that creates a protected network connection over an existing network, often using encryption and tunneling. It can be particularly useful for securing remote connections, protecting traffic on untrusted networks, and changing the public IP address that websites see.

Using one is usually simple: choose a trustworthy provider, install its official application, select a server, connect, and browse normally.

The most important thing to remember is that a VPN is a security and privacy tool—not a guarantee of complete anonymity or online safety. Choose your provider carefully and use the VPN alongside other good cybersecurity practices.

Also Read

https://cysafe.io/what-is-a-man-in-the-middle-attack-on-your-bank-login-and-how-to-stop-it

https://cysafe.io/the-blue-whale-challenge-what-every-parent-needs-to-know

https://cysafe.io/your-boss-just-asked-you-to-transfer-money-on-whatsapp-read-this-first

https://cysafe.io/is-gemini-reading-your-gmail-what-it-accesses-and-how-to-turn-it-off

References

• National Institute of Standards and Technology (NIST) — VPN Glossary: Definitions and technical background on virtual private networks. NIST VPN Glossary

• NIST SP 1800-21 — Mobile Device Security: Information on VPNs and secure remote connections.

• NIST SP 800-77 Rev. 1 — Guide to IPsec VPNs: Technical guidance on IPsec-based VPNs. NIST Guide to IPsec VPNs

• NIST SP 800-113 — Guide to SSL VPNs: Technical information about SSL/TLS VPNs. NIST Guide to SSL VPNs

• Federal Trade Commission (FTC) — VPN Apps: Consumer guidance on evaluating VPN apps, permissions, encryption, and data sharing. FTC: In the market for a VPN app?