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What are LPR and LPD? An easy-to-understand explanation of the basic concept of network printing and how it works
Introduction:
Network printing is a widely used method that allows users to send print jobs from their computers to a printer connected to a network. There are several protocols involved in network printing, and two of the most commonly used ones are LPR and LPD. In this blog post, we will explain the basic concept of LPR and LPD and how they work together to enable network printing.
Understanding LPR (Line Printer Remote):
LPR, which stands for Line Printer Remote, is a protocol used for sending print jobs from a client device to a printer. It is a simple and efficient method for transferring print data over a network. LPR works by establishing a connection between the client device and the printer, and then transferring the print data in the form of a print job. The client device sends the print job to the printer using the LPR protocol, which ensures that the data is transferred in a reliable and organized manner.
Understanding LPD (Line Printer Daemon):
LPD, which stands for Line Printer Daemon, is a process or service that runs on a printer or print server and receives the print jobs sent by the client devices using the LPR protocol. LPD acts as an intermediary between the client device and the printer, handling the incoming print jobs and deciding how to process them. It receives the print data from the client device and allows the printer to interpret and print the document accordingly.
How LPR and LPD work together:
When a user wants to print a document, they send it to the printer using the LPR protocol. The LPR protocol ensures that the print job is formatted correctly and transferred in a standardized manner. The client device specifies the destination printer’s IP address or hostname and provides any necessary print job options or settings.
Once the print job is sent, the LPD running on the printer or print server receives the print data. It interprets the print job, extracts the necessary information, such as the document format, number of copies, and any other print options. It then sends the processed data to the printer for printing.
In summary, LPR and LPD are integral components of network printing that enable the transfer and processing of print jobs over a network. LPR handles the client-side connections and sends the print jobs, while LPD on the printer or print server receives and processes the print jobs for printing. Understanding the basic concept of LPR and LPD is essential for anyone seeking to set up and use network printing effectively.
Conclusion:
Network printing has revolutionized the way users print documents by allowing them to send print jobs from their computers to network-connected printers. LPR and LPD are two key protocols that facilitate this process. By understanding how LPR and LPD work together, users can make the most of network printing and troubleshoot any issues that may arise.
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