The use of ports allow computers/devices to run multiple services/applications. The port identifies the application/service running on the machine. However a device can run multiple applications/services. On a TCP/IP network every device must have an IP address. You will also need to appreciate the difference between internal and external IP addresses and internal and external ports.Ī TCP/UDP port identifies an application or service on a machine in a TCP/IP network. To understand port forwarding you need to understand what a TCP/IP port is and how ports and IP addresses are used together. Most online gaming Applications will require you to configure port forwarding on your home router. It does this by mapping an external port to an internal IP address and port. Port forwarding is a technique that is used to allow external devices access to computers services on private networks. What is Port forwarding ? and What Does it do?
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