The internet relies on a system of addresses that treats every computer, tablet and smartphone as a distinct device, allowing all of them to communicate with each other. Because many kinds of devices ...

File-sharing applications and other programs that access a transmission control protocol/Internet protocol network use ports to route traffic to a destination. Most routers, however, use a firewall to ...

Data packets travel to and from numbered network ports associated with particular IP addresses and endpoints, using the TCP or UDP transport layer protocols. All ports are potentially at risk of ...