The Cisco NAC Appliance is able to check which three items before allowing network access？（）
A. client antivirus software state
B. personal firewall settings
C. wireless cell bandwidth availability
D. IOS versions for routers and switches
E. appropriate client patch management level
F. appropriate QoS settings for client applicatio
CFC refrigerants exposed to high temperature or direct flame, will decompose and may produce（）
A. methyl chloride
B. ammonia
C. hydrofluoric acid
D. ozone
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