Which two statements about SAN zoning on Cisco Nexus switches are true? (Choose two.)

A.
Zoning is enforced by examining the destination ID field.

B.
Devices can only belong to one zone.

C.
Only one zone set can be activated at any time.

D.
A zone can only be a member one zone set.

E.
Zoning must be administered from the primary SAN switch in the fabric.

F.
Zone configuration changes are nondisruptive.

Explanation:
A zone set can be activated or deactivated as a single entity across all switches in the fabric. Only
one zone set can be activated at any time. If zoning is not activated, all devices are members of the
default zone. If zoning is activated, any device that is not in an active zone (a zone that is part of an
active zone set) is a member of the default zone. Zoning can be administered from any switch in the
fabric. When you activate a zone (from any switch), all switches in the fabric receive the active zone
set. Additionally, full zone sets are distributed to all switches in the fabric, if this feature is enabled in
the source switch.

http://www.cisco.com/en/US/docs/storage/san_switches/mds9000/sw/sanos/quick/guide/qcg_zones.html