Identifying False Statements About SCSI Protocol Characteristics
Short answer
C The statement that SCSI-3 provides a transmission speed of up to 1 GB/s is false, as SCSI-3 standards typically max out at lower speeds like 320 MB/s (Ultra320), making this the incorrect assertion among the choices.
Question
Key Takeaways
The main trap is confusing the maximum theoretical speeds of newer storage protocols with the actual capabilities defined in the SCSI-3 standard, or misremembering the specific bandwidth limits associated with different SCSI generations.
This question tests knowledge of SCSI protocol history and specifications. The correct answer identifies the false claim about SCSI-3 transmission speeds.
Common mistake: Candidates might choose Option B thinking SCSI is limited to single-device connections, ignoring its multi-device bus architecture. Others might pick A due to acronym confusion, but A is definitively true.
Expert Analysis
The question asks to identify the false statement regarding SCSI (Small Computer System Interface). To determine the correct answer, we must evaluate each option against established storage technology facts.
Option A states that SCSI stands for "Small Computer System Interface" and is a protocol system. This is factually true. The name itself defines the standard interface for connecting computers to peripheral devices like hard drives, scanners, and printers.
Option B claims SCSI supports communication between different devices. This is also true. One of the key advantages of SCSI over earlier interfaces (like IDE) is its ability to support multiple devices (up to 15 or 16 per controller) on a single bus, allowing for robust communication among various peripherals.
Option D describes the evolution as SCSI-1 > SCSI-2 > SCSI-3. This chronological order is true. SCSI-1 was introduced in 1986, followed by SCSI-2 in 1994, and SCSI-3 in 1995/1997. This represents the historical progression of the standard.
Option C asserts that SCSI-3 provides a transmission speed of up to 1 GB/s. This statement is false. While early versions of SCSI had lower speeds (e.g., Ultra SCSI reached ~80 MB/s), SCSI-3 standards (such as Ultra160 and Ultra320) achieved speeds of 160 MB/s and 320 MB/s respectively. Even later enhancements did not cap at exactly 1 GB/s as a defining characteristic of the base SCSI-3 label in the context of typical exam questions which often contrast it with faster modern protocols or highlight specific bandwidth limits. More critically, the comment provided notes that the widely used bus width for SCSI-3 is 16 bits with a transfer rate of 20 MBps (likely referring to an older or specific subset interpretation, but clearly contradicting the high-speed claim of 1 GB/s if interpreted loosely, or more accurately, pointing out that 1 GB/s is incorrect because SCSI-3 maxes out significantly lower than modern SAS/SATA/NVMe speeds). In the context of this specific certification exam, Option C is the designated false statement because the speed figure is inaccurate for the standard's general definition or refers to a specific slow mode rather than the maximum capability, making it the clear outlier compared to the indisputably true statements in A, B, and D.
Therefore, Option C is the false statement.
Exam Strategy
When answering 'false' or 'except' questions, verify every option. For technical standards like SCSI, memorize the key milestones (versions) and their approximate speed tiers. If one option contains a specific number (like speed or capacity) that seems imprecise or outdated compared to known benchmarks, it is likely the target. Cross-reference version numbers (SCSI-1, 2, 3) to ensure chronological accuracy.
Frequently Asked Questions
What does SCSI stand for?
What is the maximum speed of SCSI-3?
Does SCSI support multiple devices?
Community Votes
100% of anonymous learners picked answer C. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 2 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 2
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wakaish 👍 1The most widely used bus width for SCSI-3 is 16 bits, with a transfer rate of 20 MBps. COLECT ANSWER IS C
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10c5cfe 👍 1 Answered Cfor SCSI-3 is 16 bits, with a transfer rate of 20 MBps
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