IPsec

A network-layer securityRefers to whether or not IoT devices or data are protected from unauthorized viewers. protocolAn agreed way of doing something. Like a convention, except that protocols tend to be related to processes.. Largely used between gatewaysA piece of electronic network equipment that takes a local network and gives it access to the internet. Your cable modem, for instance, might act as a gateway. for trafficRefers to any kind of electronic message -- email, web request, streaming video, or anything else -- that travels over a network. traveling between (but not within) LANs. Not likely to be used within IoTThe Internet of Things. A broad term covering many different applications where "things"  are interconnected through the internet. devices.