单项选择题 Which of the following helps protect important confidential information from being publiclydisclosed?（）

单项选择题 Which of the following describes a secure connection over the Internet between two sites?（）

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? （）