350-601 Storage Network Practice Question
Which THREE factors should be considered when calculating the required number of buffer credits for a long-distance Fibre Channel link? (Choose three.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The link data rate (e.g., 16 Gbps).
Buffer credits are calculated using the link data rate (affects how many bits can be transmitted per second), the maximum frame size (determines how many bytes are consumed per credit), and the distance between switches (affects propagation delay and round-trip time). Therefore, options A (data rate), B (frame size), and E (distance) are correct. VSAN count (C) and zone count (D) have no impact on buffer credit calculations.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The link data rate (e.g., 16 Gbps).
Why this is correct
Higher data rates require more buffer credits to keep the link busy.
- ✓
The maximum frame size (e.g., 2148 bytes).
Why this is correct
Larger frames require more buffer credits because each credit represents a frame.
- ✗
The number of VSANs configured.
Why it's wrong here
VSAN count does not affect buffer credit calculation.
- ✗
The number of zones in the fabric.
Why it's wrong here
Zones do not impact buffer credit needs.
- ✓
The distance between the switches.
Why this is correct
Distance increases round-trip time, requiring more buffer credits.
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