The Small Computer System Interface (SCSI) protocol defines a clear communication model between two types of devices: an Initiator and a Target. The Initiator (e.g., a host server) acts as the client, sending commands to request operations like reading or writing data. The Target (e.g., a storage disk array) acts as the server, receiving and executing these commands, then returning the requested data or a status message. This distinct request-response relationship, where one entity initiates a service request and the other fulfills it, is the fundamental principle of the Client/Server architecture.

A. Serverless Architecture: This is a cloud-native application deployment model, unrelated to the low-level communication protocol between a host and a storage device.

B. Peer to Peer Architecture: This model involves nodes with equal roles that can both initiate and respond to requests, which contradicts the fixed Initiator/Target roles in SCSI.

C. Browser/Client Architecture: This is a specific, high-level application of the client/server model, not the general architectural principle that describes the SCSI protocol.

1. Huawei Certified ICT Associate - Storage V5.0 Training Material. In the module covering storage network protocols

the SCSI protocol is described with the Initiator sending commands and the Target executing them. This interaction is presented as a foundational example of a client-server relationship in storage networking. (Specifically

refer to the section on "SCSI Protocol Principles").

2. Patterson

D. A.

& Hennessy

J. L. (2017). Computer Organization and Design: The Hardware/Software Interface (5th ed.). Morgan Kaufmann. Chapter 6

"Storage and Other I/O Topics

" describes the I/O protocol structure where a host (initiator) issues commands to a device controller (target)

which is a direct parallel to the client-server model. This text is standard in university computer science curricula.

3. T10 Technical Committee

"SCSI Architecture Model - 5 (SAM-5)"

ANSI INCITS 515-2016. Section 5.2

"SCSI domains

" and Section 5.3

"SCSI devices

" formally define the roles. An initiator port sends commands via a service delivery subsystem to a target port

which manages a logical unit to execute the command. This formalizes the client (initiator) and server (target) roles.