题目内容

AZL—60型过滤式自救器它适用于周围空气中O₂浓度不低于（）％。

A. 16
B. 17
C. 18
D. 19

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Consistency checks and compatibility checks are performed before a Virtual PortChannel （vPC） is created. During a compatibility check， one vPC peer conveys configuration information to the other vPC peer in order to verify that vPC member ports can actually form a PortChannel. Which statements about a "Virtual PortChannel graceful consistent check" are true？（）

A. Graceful consistency check is enabled by default.
B. When graceful consistency check is enabled， only the links on the secondary peer device are suspended.
C. Graceful consistency check is disabled by default， so to enable this feature， use graceful consistency-check command under VPC domain configuration mode.
D. When graceful consistency check is enabled， only the inconsistent VLANs on the secondary peer device are suspended.

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