单项选择题 Which of the following is an example of a MAC address?（）

多项选择题 Which of the following is a correct IP ACL? (Select TWO)（）

单项选择题 A network technician arrives to work and discovers users are having a problem connecting the company server. The server operator was working on upgrades the night before. Which of the following documents should the technician use to attempt to discover the problem?（）