Tcp Port 5357 _top_ — Full

Because it advertises device metadata, it can leak hostnames and network paths to anyone on the same network.

Modern Windows environments will often utilize both, preferring 5358 for encrypted data transfer but falling back to 5357 for basic discovery or devices that do not support secure handshakes. tcp port 5357

TCP port 5357 is a port number used by various applications and services for communication over the Transmission Control Protocol (TCP). This port is considered "ephemeral" or "dynamic," meaning it's not assigned to a specific application or service by default. Instead, it can be used by a variety of applications and services to listen for incoming connections or to initiate outbound connections. Because it advertises device metadata, it can leak

Handles bidirectional queries, allowing your system to monitor a printer’s status (e.g., "Out of Paper") or configuration. This port is considered "ephemeral" or "dynamic," meaning

Open (type wf.msc in Run). Select Inbound Rules > New Rule .

While discovery itself often starts with multicast messages over UDP port 3702, the actual exchange of device metadata—such as a printer’s name, model, and capabilities—happens over HTTP on . Key Functions and Features

If you want to close port 5357 on a Windows machine: