Which three statements accurately describe the factory-default storm control configuration?
(Choose three.)
A.
Storm control monitors traffic levels for broadcast traffic.
B.
Storm control monitors traffic levels for unknown unicast traffic.
C.
Storm control drops all monitored traffic in excess of 80 percent.
D.
Storm control monitors traffic levels for multicast traffic.
E.
Storm control shuts down the interface on which the storm control level is exceeded.
A traffic storm is generated when messages are broadcast on a network and each message prompts a receiving node to respond by broadcasting its own messages on the network. This, in turn, prompts further responses, creating a snowball effect. The LAN is suddenly flooded with packets, creating unnecessary traffic that leads to poor network performance or even a complete loss of network service.
Storm control enables the switching device to monitor traffic levels and to drop broadcast, multicast, and unknown unicast packets when a specified traffic level—called the storm control level or storm control bandwidth—is exceeded, thus preventing packets from proliferating and degrading the LAN. As an alternative to having the switching device drop packets, you can configure storm control to shut down interfaces or temporarily disable interfaces (see the action-shutdown statement and the recovery-timeout statement) when the storm control level is exceeded.
http://www.juniper.net/techpubs/en_US/junos14.2/topics/concept/rate-limiting-storm-control-understanding-els.html
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However, multicast is not a default setting
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