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IPSec, or Internet Protocol Security, is a set of protocols used to secure internet protocol (IP) data transmissions and communications, or more simply, internet traffic. To establish a secure connection, IPSec works by authenticating and encrypting each packet of data during the time you are connected.
Stronger security than PPTP Highly configurable Supported by iOS
Internet Key Exchange Version 2 (IKEv2) is the second-generation standard for a secure key exchange between connected devices. IKEv2 works by using an IPSec-based tunneling protocol to establish a secure connection. One of the single most important benefits of IKEv2 is its ability to reconnect very quickly in the event that your VPN connection gets disrupted. With quick reconnections and strong encryption IKEv2 makes an excellent candidate to use on Windows or iOS.
A dynamic multipoint virtual private network (DMVPN) is a secure network that exchanges data between sites without needing to pass traffic through an organization’s headquarter virtual private network (VPN) server or router.
Clientless SSL VPN
Clientless SSL VPN creates a secure, remote-access VPN tunnel to an ASA using a Web browser without requiring a software or hardware client. It provides secure and easy access to a broad range of Web resources and both web-enabled and legacy applications from almost any device that can connect to the Internet via HTTP.