Refer to the exhibit. The command spanning-tree guard root is configured on interface Gi0/0 on both switch S2 and S5. The global configuration command spanning-tree uplinkfast has been configured on both switch S2 and S5. The link between switch S4 and S5 fails. Will Host A be able to reach Host B？（）

单项选择题Refer to the exhibit. Which Virtual Router Redundancy Protocol （VRRP） statement is true about the roles of the master virtual router and the backup virtual router？（）

A.Router A is the master virtual router， and Router B is the backup virtual router. When Router A fails， Router B will become the master virtual router. When Router A recovers， Router B will maintain the role of master virtual route
B.Router A is the master virtual router， and Router B is the backup virtual router. When Router A fails， Router B will become the master virtual router. When Router A recovers， it will regain the master virtual router role
C.Router B is the master virtual router， and Router A is the backup virtual router. When Router B fails， Router A will become the master virtual router. When Router B recovers， Router A will maintain the role of master virtual router.
D.Router B is the master virtual router， and Router A is the backup virtual router. When Router B fails， Router A will become the master virtual router. When Router B recovers， it will regain the master virtual router role

多项选择题Refer to the exhibit. Which three statements accurately describe this GLBP topology？（）

A.Router A is responsible for answering ARP requests sent to the virtual IP address
B.If Router A becomes unavailable， Router B will forward packets sent to the virtual MAC address ofRouter A
C.If another router were added to this GLBP group， there would be two backup AVGs
D.Router B is in GLBP listen state
E.Router A alternately responds to ARP requests with different virtual MAC addresses
F.Router B will transition from blocking state to forwarding state when it becomes the AVG

多项选择题WhichtwoAironetenterprisesolutionstatementsaretrue？（）

A.A Cisco Aironet AP handles the transmission of beacon frames and also handles responses to probe-request frames from clients
B.A Cisco Aironet solution includes intelligent Cisco Aironet access points （APs） and Cisco Catalyst switches
C.In the Cisco Aironet solution， each AP is locally configured by the use of either a web interface or the command line interface
D.The Cisco Aironet AP handles real-time portions of the LWAPP protocol， and the WLAN controller handles those items which are not time sensitive
E.Virtual MAC architecture allows the splitting of the 802.11 protocol between the Cisco Aironet AP and a LAN switch

单项选择题Refer to the exhibit. What is the effect on the trust boundary of configuring the command mls qos trust cos on the switch port that is connected to the IP phone？（）

A.Effectively the trust boundary has been moved to the IP phone
B.The host is now establishing the CoS value and has effectively become the trust boundary
C.The switch is rewriting packets it receives from the IP phone and determining the CoS value
D.The switch will no longer tag incoming voice packets and will trust the distribution layer switch to set the CoS
E.RTP will be used to negotiate a CoS value based upon bandwidth utilization on the link

单项选择题Refer to the exhibit. Which statement is true about a voice VLAN？（）

A.Physically the voice network and the data network are separate
B.The voice traffic will normally be on a different IP subnet than will the data traffic
C.End user intervention is necessary to place the phone into the proper VLAN
D.The same security policy should be implemented for both voice and data traffic
E.The data VLAN must be configured as the native VLAN