200-150 · Question #251
In Fibre Channel networking, the FCID is composed of which set of identifiers?
The correct answer is D. domain ID, area ID. port ID. A Fibre Channel Identifier (FCID) is a 24-bit address assigned during fabric login that is composed of a domain ID, area ID, and port ID.
Question
In Fibre Channel networking, the FCID is composed of which set of identifiers?
Options
- AVSAN ID. zone ID, port ID
- BVSAN ID. area ID. port ID
- Cdomain ID. zone ID. port ID
- Ddomain ID, area ID. port ID
How the community answered
(36 responses)- A3% (1)
- B3% (1)
- C8% (3)
- D86% (31)
Why each option
A Fibre Channel Identifier (FCID) is a 24-bit address assigned during fabric login that is composed of a domain ID, area ID, and port ID.
VSAN ID is a Cisco-specific virtual fabric segmentation construct and is not part of the 24-bit FCID address structure; zone ID is an access control identifier, not an addressing field.
VSAN ID is not a component of the FCID; the FCID is a pure fabric address and does not encode virtual SAN membership.
Zone ID is a logical grouping used for access control, not an address component; the domain ID field is correct but must be paired with area ID, not zone ID, to correctly describe FCID structure.
The FCID is structured as three 8-bit fields: the domain ID identifies the specific FC switch within the fabric, the area ID identifies a logical group or module of ports on that switch, and the port ID identifies the individual port within that area - together forming the unique N_Port Identifier used for all FC fabric routing and addressing.
Concept tested: Fibre Channel ID structure - domain, area, and port fields
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/8_x/config/fundamentals/cisco_mds9000_fundamentals_config_guide_8x/overview.html
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