问题：
[单选题] NAC's（Network Access Control）role is to restrict network access to only compliant endpoints and（ ）users.However,NAC is not a complete LAN（请作答此空）solution;additional proactive and（ ）security measures mu
A、crisis
B、security
C、favorable
D、excellent
参考答案：
B、security
● 参考解析
