200-150 · Question #181
Which statement describes the uses of zones in a VSAN?
The correct answer is C. Zones limit unicast, multicast, and broadcast traffic.. Zones in a Fibre Channel VSAN act as traffic isolation boundaries that restrict all types of fabric communication to authorized zone members only.
Question
Which statement describes the uses of zones in a VSAN?
Options
- AZones are configured at the fabric core.
- BAn HBA or storage device can only belong to zone.
- CZones limit unicast, multicast, and broadcast traffic.
- DZones are a group of sports within a single VSAN.
How the community answered
(51 responses)- A8% (4)
- B4% (2)
- C86% (44)
- D2% (1)
Why each option
Zones in a Fibre Channel VSAN act as traffic isolation boundaries that restrict all types of fabric communication to authorized zone members only.
Zones are not configured at the fabric core specifically - zone configuration is managed by the zone server distributed across the fabric and can be administered from any switch in the VSAN.
Devices such as HBAs and storage targets can belong to multiple zones simultaneously, allowing flexible many-to-many access policies without restriction to a single zone.
Zones limit unicast, multicast, and broadcast traffic within a VSAN by ensuring that only devices sharing zone membership can exchange Fibre Channel frames, name server queries, and fabric notifications. This comprehensive traffic isolation prevents unauthorized storage access, reduces unnecessary broadcast propagation, and enforces security boundaries between initiators and targets. The zone server distributes the active zone set to all switches in the fabric so enforcement is consistent across the entire VSAN.
Zone membership is not limited to ports - zones can include WWNs, FC aliases, IP addresses, and symbolic node names, making this definition both technically incomplete and additionally incorrect due to the typo of 'sports' instead of 'ports'.
Concept tested: Fibre Channel VSAN zoning and traffic isolation
Source: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/nx-os/configuration/guides/san/b_cisco_mds_nxos_san_config_guide/b_cisco_mds_nxos_san_config_guide_chapter_zoning.html
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