Internet TCP port 3128 is commonly used by web proxy and caching servers such as Squid Proxy server. Squid is an open-source proxy caching server that can optimize web delivery by caching internet content, reducing bandwidth, and improving response times. Additionally, some antivirus software, like Avast, also use this port for web shield functionality. However, it's important to note that this port can be configured for other uses depending on the network's requirements.
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