What Is Port Triggering Used For on a Router?In Feburary 2016 06,

In Feburary 2016 06,
Routers use a network address translation (NAT) firewall to protect a network from unauthorized access over the Internet. The NAT firewall blocks incoming data transmissions by sealing the incoming data ports on the network. Port triggering temporarily opens these data ports when a LAN computer requires unrestricted access to the Internet.
Benefits
Port triggering differs from another method for opening incoming data ports known as port forwarding. With port forwarding, the router leaves the specified data ports open all the time. Port triggering, however, only opens the ports when a computer requests access to them. Also, unlike port forwarding, port triggering does not require LAN computers to have a static network address.
Considerations
You can enable port triggering through the router's configuration software. With port triggering, only one computer at a time can access the open port, whereas port forwarding permits multiple LAN computers to share a single open port.
In Feburary 2016 06,