单选题What is the first CoS process performed when a packet enters a JUNOS device?（）ARewrite MarkerBMultifield ClassifierCPolicingDBA Classifier
单选题
What is the first CoS process performed when a packet enters a JUNOS device?（）
A
Rewrite Marker
B
Multifield Classifier
C
Policing
D
BA Classifier
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解析：
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