How many channels are defined in the IEEE 802.11b DSSS ……

单项选择题Which signal and noise values will result in the best phone communication with an access point?（）

A. signal strength 46dBm, noise level 95dBm
B. signal strength 74dBm, noise level 94dBm
C. signal strength 68dBm, noise level 79dBm
D. signal strength 50dBm, noise level 56dBm

单项选择题For acceptable voice calls, the packet error rate should be no higher than what value?（）

A.0.1%
B.1%
C.2.5%
D.25%

多项选择题Which three of these are elements of the Cisco Unified Wireless Network architecture?（）

A. cell phones
B. remote access
C. mobility services
D. network management
E. network unification
F. network decentralization

单项选择题To ensure quality, what is the maximum end-to-end transit time in milliseconds on a voice network?（）

A.50
B.100
C.150
D.200
E.250

多项选择题Which two statements about Cisco Security Management Suite are correct?（）

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.