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)

Explanation: