Internet UDP port 8081 is commonly used by applications and services that require fast, connectionless data transfers. For instance, CoAP (Constrained Application Protocol) often uses this port for its lightweight IoT communications. Additionally, some proxy and caching servers, like the Nginx HTTP/HTTPS proxy and caching server, can be configured to use port 8081. However, it's important to note that the usage of this port can vary widely depending on the specific network configuration and application requirements.
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