SG0-001 · Question #26
Two single-port 2Gb HBAs can support up to which of the following?
The correct answer is C. 400MB/S. Two single-port 2Gb Host Bus Adapters (HBAs) can collectively support a maximum throughput of 400 MB/s. Each 2 Gigabit Fibre Channel HBA provides 200 MB/s of bandwidth.
Question
Two single-port 2Gb HBAs can support up to which of the following?
Options
- A200MB/S
- B320MB/S
- C400MB/S
- D4200MB/S
How the community answered
(35 responses)- A3% (1)
- B6% (2)
- C89% (31)
- D3% (1)
Why each option
Two single-port 2Gb Host Bus Adapters (HBAs) can collectively support a maximum throughput of 400 MB/s. Each 2 Gigabit Fibre Channel HBA provides 200 MB/s of bandwidth.
200 MB/s is the throughput of a single 2Gb HBA, not two combined.
320 MB/s is not a standard Fibre Channel throughput for this configuration.
A 2 Gigabit (Gb) Fibre Channel link provides 200 Megabytes per second (MB/s) of throughput (2 Gbps / 8 bits/byte = 250 MB/s, often simplified or rounded to 200 MB/s in older contexts due to encoding overhead). If there are two such single-port HBAs, their combined theoretical throughput would be 2 * 200 MB/s = 400 MB/s.
4200 MB/s is significantly higher than what two 2Gb HBAs can provide; for example, 32Gb FC provides approximately 3200 MB/s.
Concept tested: Fibre Channel HBA throughput calculation
Source: https://www.fibrechannel.org/wp-content/uploads/2019/12/FCIA-Intro-to-FC-Standards-White-Paper.pdf
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