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2. Virtual private network - Wikipedia

   en.wikipedia.org/wiki/Virtual_private_network

   Virtual private network (VPN) is a network architecture for virtually extending a private network (i.e. any computer network which is not the public Internet) across one or multiple other networks which are either untrusted (as they are not controlled by the entity aiming to implement the VPN) or need to be isolated (thus making the lower network invisible or not directly usable).

3. IPsec - Wikipedia

   en.wikipedia.org/wiki/IPsec

   t. e. In computing, Internet Protocol Security (IPsec) is a secure network protocol suite that authenticates and encrypts packets of data to provide secure encrypted communication between two computers over an Internet Protocol network. It is used in virtual private networks (VPNs).

4. OpenVPN - Wikipedia

   en.wikipedia.org/wiki/OpenVPN

   OpenVPN is a virtual private network (VPN) system that implements techniques to create secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities. It implements both client and server applications.

5. Overview of NordVPN - AOL Help

   help.aol.com/articles/overview-of-nordvpn

   A VPN, or virtual private network, is a service that protects your internet connection and privacy online. By creating an encrypted tunnel for your data, a VPN protects your online identity by hiding your system’s IP address. Work, shop, browse or use social media platforms safely knowing NordVPN is helping keep your data protected.

6. Tech support: What is two-factor authentication and how to ...

   www.aol.com/news/tech-support-two-factor...

   This was a legacy VPN profile, meaning it was an older VPN profile that they didn't really use. And it just didn't have it activated. You have to imagine that a lot of companies don't have the ...

7. Layer 2 Tunneling Protocol - Wikipedia

   en.wikipedia.org/wiki/Layer_2_Tunneling_Protocol

   Layer 2 Tunneling Protocol. In computer networking, Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private networks (VPNs) or as part of the delivery of services by ISPs. It uses encryption ('hiding') only for its own control messages (using an optional pre-shared secret), and does not provide any encryption ...