单项选择题
A. reset of the primary supervisor
B. manual switchover from standby to active supervisor
C. manual switchover from active to standby supervisor
D. automatic switchover from active to standby on primary supervisor failure
单项选择题 Refer to the exhibit. Which of the following statements is true? （）
单项选择题 Refer to the exhibit. You want to minimize the downtime that results from supervisor engine switchovers on Cisco 6500 Series Switches and Cisco 7600 Series Routers. To achieve this, you are considering deploying a Cisco Nonstop Forwarding with Stateful Switchover solution using OSPF. In the exhibit you can see the output of the show ip ospf neighbor detail command. Which trait of systems using Cisco Nonstop Forwarding with Stateful Switchover and OSPF is shown in the exhibit output and will impact your plan?（）
单项选择题 When you issue the logging trap informational command, what happens? （）