SCSI系列标准提供了许多不同的传输协议，这些协议定义了不同SCSI设备之间交换信息的规则。本标准规定了与串行ATA物理互连兼容的串行连接SCSI（SAS）物理互连的功能要求。SAS协议层-3（SPL-3）标准记录了与串行连接的SCSI-3（SAS-3）相对应的SAS协议层，定义了使用串行互连在SCSI设备之间交换信息的规则。其他SCSI传输协议标准定义了使用其他互连在SCSI设备之间交换信息的规则。

The SCSI family of standards provides for many different transport protocols that define the rules for exchanging information between different SCSI devices. This standard specifies the functional requirements for the Serial Attached SCSI (SAS) physical interconnect, which is compatible with the Serial ATA physical interconnect. The SAS Protocol Layer - 3 (SPL-3) standard documents the SAS protocol layer corresponding to the Serial Attached SCSI - 3 (SAS-3), defining the rules for exchanging information between SCSI devices using a serial interconnect. Other SCSI transport protocol standards define the rules for exchanging information between SCSI devices using other interconnects.