CCNP系列認(rèn)證CCNP(642-892)單項(xiàng)選擇題每日一練(2019.01.14)

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？（）

Refer to the exhibit. A Cisco Aironet Wireless LAN Client Adapter has been installed and configured  through the ADU on the PC. The Aironet System Tray Utility （ASTU） has been enabled during the  installation and the icon appears in the system tray area in the lower right of the desktop. What is the  significance of the icon？（）

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？（）

Refer to the exhibit. Which Catalyst switch interface command would be used to cause the switch to instruct the phone to override the incoming CoS from the PC before forwarding the packet to the switch？（）