单选题The policy action of color is used for congestion control under which circumstance?（）Acongestion in an upstream routerBcongestion in a downstream routerCcontention for queue space on an egress interfaceDcontention for queue space on an ingress interface
单选题
The policy action of color is used for congestion control under which circumstance?（）
A
congestion in an upstream router
B
congestion in a downstream router
C
contention for queue space on an egress interface
D
contention for queue space on an ingress interface
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单选题You are experiencing contention in the queue on an egress interface of the router. Which policy action should be used for congestion control?（）AmarkBcolorCfilterDdiscard
多选题Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality of voice calls？（）AIncrease the queue size of the voice class.BGuarantee bandwidth during congestion to the voice class with a bandwidth command.CIncrease the tx-ring of the egress interface.DImplement LLQ for the voice class.EDecrease the rx-ring of the egress interface.FDecrease the queue size of the voice class.
单选题Which statement describes exception traffic?（）AException traffic must be sent to the PFE for processing.BException traffic enters one ingress port and is sent out multiple egress ports.CException traffic is rate-limited on the internal link to prevent DoS attacks.DException traffic is processed after forwarding traffic when congestion exists.
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