There are various types of VPNs available,including:

VPN, or Vybrana Privacy Network, is a software tool used to block access to websites from unknown sources. It allows users to protect their online activities, such as browsing the internet or accessing online services, from being intercepted by unknown servers or networks. VPNs can be used for a variety of purposes, including browsing the web, accessing online banking or financial services, streaming content, or even accessing public Wi-Fi. They are often used in environments where there is a risk of being intercepted by unknown servers or networks, such as in public Wi-Fi hotspots or in areas with poor internet coverage.

1. Client-side VPNs: These VPNs block access to websites on the user's computer.
2. Server-side VPNs: These VPNs block access to websites on the user's computer by intercepting traffic sent to unknown servers.

Some popular VPN providers include:

• Bitdefend
• OpenVPN
• VPNs from P2P Labs
• VPNs from MalwareFuel
• VPNs from VPSafe

It's important to note that VPNs are primarily used for privacy and security, not for blocking specific websites like YouTube or Facebook. If you need to access certain websites or services, you should use the appropriate browser settings or public Wi-Fi.