| Revision as of 05:18, 17 November 2008 editSmackBot (talk | contribs)3,734,324 editsm Date maintenance tags and general fixes← Previous edit | Revision as of 08:22, 6 April 2013 edit undoDavew123 (talk | contribs)67 editsm Added SMTP Domain ValidationNext edit → | ||
| Line 13: | Line 13: | ||
| ] | ] | ||
| This should not be confused with '''Domain Validation''' in the context of ] email wherein the sending machine is 'validated to send' for a given sender's domain. Covered under patent GB2449653. | |||
Revision as of 08:22, 6 April 2013
 | This article does not cite any sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Domain validation" – news · newspapers · books · scholar · JSTOR (November 2008) (Learn how and when to remove this message) |
Domain Validation is part of the SCSI standard. It describes how to negotiate the best possible transfer agreement between two devices. There are three different messages that can be sent:
- SDTR (Synchronous Data Transfer Request)
- WDTR (Wide Data Transfer Request)
- PPR (Parallel Protocol Request)
WDTR is used only to negotiate width (8 or 16 bit).
SDTR can be used to negotiate up to Ultra-2 speeds.
PPR subsumes the capabilities of both WDTR and SDTR and can negotiate speeds of up to Ultra-640. It can also set various parameters, such as Information Units, Quick Arbitration Select and Double Transition clocking.
This should not be confused with Domain Validation in the context of SMTP email wherein the sending machine is 'validated to send' for a given sender's domain. Covered under patent GB2449653.
Categories: