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Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was ...
WS-Discovery is enabled by default in networked HP printers since 2008. [1] [2] WS-Discovery is an integral part of Windows Rally technologies and Devices Profile for Web Services. The protocol was originally developed by BEA Systems, Canon, Intel, Microsoft, and WebMethods. On July 1, 2009 it was approved as a standard by OASIS. [3]
If MPLs are used, then searching for devices is unnecessary. Users are presented with a predefined list of devices from which to choose. MPLs are XML files that can be created manually, with the HP MPA utility, or exported from HP Web Jetadmin. When the HP UPD is activated, it begins by searching the network for the MPL file as shown in Figure 6.
A printing protocol is a protocol for communication between client devices (computers, mobile phones, tablets, etc.) and printers (or print servers).It allows clients to submit one or more print jobs to the printer or print server, and perform tasks such as querying the status of a printer, obtaining the status of print jobs, or cancelling individual print jobs.
All devices are required to listen on port 427 for UDP packets, SAs and DAs should also listen for TCP on the same port. Multicasting is used extensively by SLP, especially by devices that join a network and need to find other devices. The operation of SLP differs considerably, depending on whether a Directory Agent (DA) is in the network or not.
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