Study the exhibit shown below carefully.

In this scenario the service provider wants to ensure that switch S1 is the root switch for its own network and the network of . 
On which interfaces should root guard be configured to ensure that this happens？（）
 

多项选择题In order to enhance worker productivity， a Cisco wireless network has been implemented at all    locations.  Which three statements regarding WLAN are true？（）

A.A WLAN client will operate in half-duplex mode.
B.The Aironet 1230 access point is an example of an access point that operates solely as a lightweight access point.
C.Ad hoc mode allows mobile clients to connect directly without an intermediate AP.
D.WLANs are designed to share the medium and can easily handle an increased demand of channel contention.
E.A lightweight AP receives control and configuration from a WLAN controller to which it is associated.
F.Another term for infrastructure mode is independent service set （IBSS）.

单项选择题Switch 1 was configured as shown below： Based on the output shown above，  which statement is true？ （）

A.IP traffic matching access list    is forwarded through VLANs 5-10.
B.All VLAN traffic in VLANs 5-10 that match access list    will be forwarded， and all else will be dropped.
C.IP traffic matching VLAN list 5-10 will be forwarded， and all other traffic will be dropped.
D.All VLAN traffic matching VLAN list 5-10 will be forwarded， and all traffic matching access list    is dropped.
E.None of the other alternatives apply

多项选择题WhichofthefollowingarefunctionsthatareoftenprovidedbyanITSPbutarenottypicallyprovidedbythePSTN？（）

A. QoS
B. call setup and teardown
C. call routing
D. call supervision
E. audio signal compression

单项选择题WhichofthefollowingisnotinformationprovidedfromanIPphonetoaCatalystswitchusingCDP？（）

A. device PoE requirements
B. device IP address
C. device voice VLAN ID
D. device platform

单项选择题WhichofthefollowingwillgenerateanRSTPtopologychangenotification？（）

A. an edge port that transitions to the forwarding state
B. a non-edge port that transitions to the blocking state
C. a non-edge port that transitions to the forwarding state
D. an edge port that transitions to the blocking state
E. any port that transitions to the blocking state
F. any port that transitions to the forwarding state