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Private Printer Server
Port 35 is unofficially associated with proprietary or private printer server protocols, typically for device discovery, configuration, and data exchange in local or enterprise printer networks. It can support both TCP and UDP transport modes, providing flexibility during printer communication setup and operation..
Port 35 is not officially assigned to any standardized protocol by IANA but has historically been utilized in some proprietary and private printer server implementations. It is often leveraged during initial printer discovery, network printer management, and print job negotiation in both peer-to-peer and client-server models. The bidirectional communication enabled on this port facilitates status reporting, configuration commands, and data transmission.
In many enterprise environments, printer servers supporting multiple devices use private or vendor-specific protocols for managing print queues, authenticating users, and spooling print jobs. The use of port 35 can be part of a closed ecosystem where printer management software communicates with printers over secure or insecure channels, depending on deployment.
TCP is typically used for reliable, connection-oriented sessions ensuring the integrity of print-related transactions, while UDP may be utilized for quick, connectionless discovery or simple status updates requiring low latency. Since port 35 is unofficial, adoption depends heavily on vendor implementations and legacy configurations.