Question

Ipsec ____ use a complex set of security protocols to protect information, including internet key exchange (ike), which provides for the exchange of security keys between the machines in the vpn.

Answer 1

It is called as IPSec concentrators. A router-based VPN essentially used to handle multiple secure connections into the given network. An IPSec concentrator is one of the devices that form the endpoints of the VPN. Other devices could be a server, VPN appliance, or firewall/VPN combination.