 - Xmodem is an error-correcting protocol for modem that was created in 1978 by Ward Christensen and became a de facto standard. Modems that agree on using the Xmodem protocol send data in 128-byte blocks. If a block is received successfully, a positive (ACK) acknowledgement is returned. If an error is detected, a negative (NAK) acknowledgement is returned and the block is resent. Xmodem uses the checksum method of error checking.
See modem error-correcting protocols for a comparison with other error-correcting protocols.
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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: |
Paulo Julio Achoa Mello |
| LAST UPDATED: |
16 Apr 2007
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