TCP ports / UDP ports: What ports are important and why? - IONOS
https://www.ionos.com/digitalguide/server/know-how/tcp-ports-and-udp-ports/
WebJul 8, 2020 · Know-how. UDP and TCP ports: A list of the most important ports. TCP and UDP are used to connect two devices over the Internet or other networks. However, to give data packages an entrance to the PC or server at the other end of the connection, the “doors” have to be open. These openings into the system are called ports.
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