How many channels are defined in the IEEE 802.11b DSSS channel set？（）

A. Signal strength 0dBm， noise level 6dBm
B. Signal strength 8dBm， noise level 9dBm
C. Signal strength 4 dBm， noise level 4 dBm
D. Signal strength 6dBm， noise level 5 dBm

A. 50
B. 100
C. 150
D. 200
E. 250

A. It should be implemented in a management VLAN.
B. Its connection to managed devices should be over a data VLAN.
C. It is made up of Cisco Security MARS and Clean Access software.
D. It should be deployed as close to the edge of the network as possible.
E. It delivers policy administration and enforcement for the Cisco Self-Defending Network.