What amount of cell overlap ensures smooth roaming for wireless endpoints？（）

单项选择题HowmanychannelsaredefinedintheIEEE802.11bDSSSchannelset？（）

A. 3
B. 4
C. 11
D. 13
E. 14

单项选择题Whichsignalandnoisevalueswillresultinthebestphonecommunicationwithanaccesspoint？（）

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

单项选择题Toensurequality，whatisthemaximumend-to-endtransittimeinmillisecondsonavoice network？（）

A. 50
B. 100
C. 150
D. 200
E. 250

多项选择题WhichtwostatementsaboutCiscoSecurityManagementSuitearecorrect？（）

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.

多项选择题WhichthreemechanismsareusedtosecuremanagementtrafficfromoutsideIPSsensors？（）

A. secure tunnels
B. a separate management VLAN
C. secure VLANs to isolate sensors
D. an out-of-band path around the firewall
E. asymmetric traffic flows to isolate sensors
F. private VLANs to put all sensors on isolated ports