单项选择题 While troubleshooting a network outage, you discover that an employee brought a switch from home into the office to connect additional equipment to the network. In order to increase his speed, he connected this switch to both network ports in his office, resulting in a bridge loop. Which of these can you implement to prevent future occurrences of this issue?（）

多项选择题 Which two of the following statements are true about HSRP load sharing?（） (Choose two)

单项选择题 On a Cisco Catalyst switch, which configuration command is used to apply a VACL named "test"to filter the traffic within VLAN100? （）