30-Second Summary:

  • A Virtual Private Network (VPN) provides a secure internet connection between a user and a VPN server.

  • Two main types of VPN include Site-to-Site VPN and Client-to-Site VPN. Other classifications encompass VPN appliances and software-based VPNs.

  • The VPN tunnel is an encrypted link between a user’s mobile device or computer and a VPN server. VPN tunneling protocols used for encryption include IPSec/IKE, IKEv2, PPTP, L2TP, OpenVPN, and SSTP.</p

  • Individuals and organizations widely use VPNs to protect network traffic and ensure network security.



Every modern organization encourages work-from-home in this digital world. However, remote work isn’t possible without a secure internet connection. Therefore, protecting the mobile workforce and heterogeneous IT environment has become the priority for every enterprise. Thus, a Virtual Private Network (VPN) allows secure connectivity to a corporate network through a shared or public internet connection. VPN encrypts network traffic to ensure data confidentiality and offers security features such as data privacy and authentication.

This article will explore different VPN types, VPN tunneling protocols, how VPN is better to protect network traffic and perimeter, and more.

What Are the Types of VPNs?

There are two main types of VPN: Site-to-Site VPN and Client-to-Site VPN. You can set up the VPN with hardware or firewall software that incorporates VPN functionality. Many firewalls offer a built-in VPN system. To set up a VPN on a hardware device, assume an example of a router configured to provide the VPN protocol. Security professionals also use a VPN server to run VPN software. Are you interested to know what is VPN server? It is either a physical or virtual server configured to host and deliver VPN services across the globe.

If you want to choose a system, you must consider VPN types. For example, you need to consider whether it comprises hardware or software, or maybe both. Also, you need to make sure that your chosen VPN works with any computers or any number of different operating systems.

What Do I Need to Know About VPN Appliances?

In some cases, you may be using VPN appliances that allow connection among multiple networks or innumerable users. Still, they cannot provide other services, such as printing and file sharing. Most VPN vendors provide numerous appliance solutions that start at a SOHO grade, supporting 10, 25, or even 50 concurrent VPN connections. These appliances also include Network Address Translation (NAT), packet filtering, and even an antivirus program. Another category of VPN can support up to 2,000 or even more simultaneous VPN connections having a range of gigabits. One of the main advantages of a hardware-built-in VPN appliance is that it does not go offline when the server crashes or goes offline.

What Is a Software-based VPN system?

Software-based VPN systems are appropriate for traveling employees who want to access the corporate LAN or intranet from any dial-up location. Business partners also use these VPNs to get a secure connection to an organizational data network. Moreover, end users can create multiple configuration profiles, such as “in-office,” “at-home,” or “out-of-office.” Finally, a single central location is used to perform installations and maintenance.

If you want to access Web-enabled applications, SSL-based VPNs are for you. They use SSL protocols rather than IPSec. 

Site-to-Site VPN

Site-to-Site VPN establishes a secure tunnel between two networks through the public internet. Data encryption is only between a VPN concentrator and a VPN server, known as tunnel endpoints. It means that Site-to-Site VPN doesn’t encrypt any traffic outside these tunnel endpoints. This type of VPN is mainly used for organizations with multiple locations, each with its own Local Area Network (LAN), such as the company’s remote office and central office. As a result, the company will have a secure network connection at a remote site protocol.

Client-to-Server VPN

Client-to-Server VPN develops a secure tunnel between a VPN client and a specific network through a public network. The VPN client establishes connectivity with all the PCs in the particular network. This type of VPN encrypts traffic only between the VPN server and the VPN client. In other words, Client-to-Server VPN doesn’t encrypt traffic between the VPN server and other PCs inside the specific network. As a result, Client-to-Server VPN offers greater efficiency and access to corporate resources.

What Do I Need to Know About VPN Tunneling Protocols?

The VPN tunnel is an encrypted link between a user’s mobile device or computer and a VPN server. Neither your Internet Service Provider (ISP) nor hackers can intercept the data without a cryptographic key. You may also need to know what is VPN tunneling. In fact, VPN tunneling is a way to protect data online.

The data in a VPN tunnel is split and encapsulated within packets, just like putting a letter inside an envelope. No sooner the packet reaches the VPN server (or destination) than it is reconverted into its original condition so that the VPN server can access it. Usually, the VPN tunnel does traffic encryption, secures WiFi hotspots, and hides IP addresses. There are many protocols for VPNs. The following sections gain an insight into VPN tunneling protocols and VPN protocol comparison.


IPSec protocol encrypts data part of packets, authenticates sources of packets, and encapsulates between two VPN hosts. IPSec’s two security techniques include Encapsulating Security Payload (ESP) and Authenticated Headers (AH). The former encrypts the data portion of packets while the latter authenticates packets. If someone asks what name is given to a protocol to implement a VPN connection between two computers? The best answer is the IPSec protocol.

IPSec protocol is often used with Internet Key Exchange (IKE) protocol to encrypt public key cryptography data. You can encrypt data between LANs or a LAN and client. As a matter of fact, IKE facilitates the exchange of private and public keys. IKE also identifies which VPN encryption protocols should be employed to encrypt data passing via a VPN tunnel.

Point-to-Point Tunneling Protocol (PPTP)

The PPTP establishes a connection by using the dial-in modem. It is often helpful for remote users. The PPTP encrypts data using a Microsoft Point-to-Point Encryption (MPPE) and is compatible with Network Address Translation (NAT).

Layer 2 Tunneling Protocol (L2TP)

The L2TP establishes a dial-up connection over the internet, Point-to-Point Protocol (PPP). Although L2TP delivers a high level of encryption and authentication, it is incompatible with NAT. Furthermore, unlike PPTP, which uses MPPE for encryption, L2TP utilizes IPSec to encrypt data.

How Does a Virtual Private Network (VPN) Provide Additional Security Over Other Types of Networks?

Network security professionals widely use VPNs to protect their network infrastructure and communications. The VPN hides your actual IP address while you connect to the internet. Third parties will see your IP address that is anonymous and associated with the IP address of the VPN server. Get an encrypted connection and safely connect to public WiFi and open hotspots.

The Bottom Line 

Nowadays, organizations prefer remote work for many reasons, such as Covid-19. However, remote work without cybersecurity is out of the question. To this end, you must consider VPN to protect your internet connection and general cybersecurity guidelines to work-from-home.

Which of the following is true of a Virtual Private Network (VPN)? There can be many definitions of a VPN, but the most comprehensive one is: A Virtual Private Network (VPN) provides a secure connection for data transmitted on the internet. There are two main VPN types, including Site-to-Site VPN and Client-to-Site VPN. In addition, there are other classifications such as VPN appliances (Hardware-based VPNs), Software-based VPNs, or both. This article also took a deep dive to understand VPN tunneling protocols. The PPTP, IKEv2, and PPTP VPN protocols are supported by modern VPN brands, including Hotspot Shield, ExpressVPN, and NordVPN. Moreover, CyberGhost VPN also supports some major VPN protocols, including OpenVPN, IKEv2, WireGuard, and (L2TP) / IPSec.

If someone asks which of the following protocols is not used for windows 7 VPN connections? The answer is SMPT because SMTP protocol is not used for Windows 7 VPN connections.