单项选择题
In an enterprise setting, access switches providing network connectivity placed throughout abuilding are typically connected to a backbone called the:（）
A. MDF B. Proxy C. Demarcation point D. Smart jack
单项选择题 Which of the following connector types is used for coax cable?（）
单项选择题 An administrator needs to diagnose problems with a WINS server. Which of the following toolsshould be used?（）
单项选择题 Which of the following authenticates a web server to the remote client in PKI?（）
