单项选择题Please match the Cisco NAC appliance component to its description.() (1)Cisco NAS (2)Cisco NAA (3)Rule-set Lpdates (4)Cisco NAM (a) a centralized management point (b) an in-band cr out-of-band device for network access control (c) a Windows-based client which allows network access based on the tasks running (d) a status crecker for operating systems,antivirus,antispyware,etc.
A.(a)-(4);(b)-(1);(c)-(2);(d)-(3)
B.(a)-(3);(b)-(2);(c)-(4);(d)-(1)
C.(a)-(4);(b)-(3);(c)-(1);(d)-(2)
D.(a)-(2);(b)-(4);(c)-(3);(d)-(1)