单项选择题 Several users have recently been calling the helpdesk about a recent network outage. These calls have increased in the last hour and are all by different users calling about the same issue. Which of the following types of communication skills should the helpdesk technicians MOST likely exercise while answering each call? （）

单项选择题 There are several technicians working on various systems on a new workbench. Which of thefollowing should be reviewed to ensure all proper procedures are followed to help reduce anypossible issues?（）

单项选择题 Which of the following is a layer 3 device that separates broadcast domains?（）