单项选择题 Which keyword is used with the debug ipv6 [keyword] command to troubleshoot neighbor discovery problems?（）

多项选择题 Which three of the following are components of a syslog message? （）(Choose three.)

单项选择题 Which of these commands can you use to show if an operational Catalyst switch port is set for autonegotiation of speed and duplex when running Cisco IOS software?（）