SG0-001 · Question #98
Which of the following describes the function of an ISL?
The correct answer is B. Link between two Fibre Channel switches. An Inter-Switch Link (ISL) in Fibre Channel environments serves to connect two Fibre Channel switches, allowing them to form a unified, larger Storage Area Network (SAN) fabric.
Question
Which of the following describes the function of an ISL?
Options
- ALink between two initiators
- BLink between two Fibre Channel switches
- CLink between one target and one initiator
- DLink between two targets
How the community answered
(31 responses)- A3% (1)
- B94% (29)
- C3% (1)
Why each option
An Inter-Switch Link (ISL) in Fibre Channel environments serves to connect two Fibre Channel switches, allowing them to form a unified, larger Storage Area Network (SAN) fabric.
An ISL connects switches, not individual initiators (host bus adapters) to each other.
ISLs are essential for scaling Fibre Channel SANs, as they enable multiple switches to be interconnected, extending the reach and connectivity for storage devices and servers across the fabric to communicate efficiently.
A link between one target and one initiator is typically a host-to-storage port connection within the fabric, not an ISL.
An ISL connects switches, not individual targets (storage devices) to each other.
Concept tested: Fibre Channel Inter-Switch Link (ISL) function
Source: https://www.snia.org/education/what-is-san/fibre-channel
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