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.