 - Xon/Xoff (sometimes written "X-on/X-off" or "XON/XOFF" and pronounced eks-AWN eks-AWF) is a protocol for controlling the flow of data between computers and other devices on an asynchronous serial connection. For example, a computer typically sends data to a printer faster than the printer can print. The printer contains a buffer where data is stored until the printer catches up with the computer. If the buffer becomes full before the printer catches up, a small microprocessor in the printer sends back an X/off signal to stop sending data. When enough data is printed and buffer storage becomes free, the printer sends an X/on signal telling the computer to resume sending data.The "X" stands for "transmitter" so the X/on and X/off are signals to turn a transmitter on or off. The actual signal for X/on is the same bit configuration as the ASCII Ctrl-Q keyboard combination. The X/off signal is the Ctrl-S character. When you define your modem to your computer's operating system, you may need to specify the use of flow control with X/on/Xoff or with CTS/RTS (Clear to Send/Ready to Send). When sending binary data, Xon/Xoff may not be recognized because it is character-encoded.
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Learn more about LANs (Local Area Networks) |
| LAN administration guide: LAN administration is an arduous task and your responsibilities often involve many different aspects and may include many tasks. This guide will help you with each step and task. |
| LAN network design considerations: What are the steps to be kept in mind while designing a network having three hundred nodes within a three-floor building and one server room? |
| 10 Gigabit Ethernet tutorial: Connecting data centers, storage, LAN and beyond: Learn how to choose 10 Gigabit Ethernet cabling and components, why new Gigabit Ethernet protocols will improve performance, and how it can all result in data center optimization. |
| Best practices for securing your wireless LAN: Learn best practices for securing a wireless LAN (WLAN) in the enterprise, from systematically monitoring your WLAN for intruders to protecting users and the network itself. |
| A basic virtualized enterprise -- from 'Network Virtualization': Learn why and how to virtualize the network in this chapter from 'Network virtualization' by Victor Moreno and Kumar Reddy. |
| Configuring VLANs: Learn how to configure a virtual LAN (VLAN) in this step-by-step, automated, 15-minute demo. |
| Network administration guide: Network administration responsibilities, such as network design, troubleshooting, backup, documentation, security, and managing users are discussed in this guide. |
| CONTRIBUTORS: |
Edward Armelino |
| LAST UPDATED: |
11 Apr 2007
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