单项选择题
A. Physical and logical network
B. Physical network
C. Logical network
D. DHCP tables and DNS records
多项选择题 Which of the following ports are used by default for web servers? （）(Select TWO)
单项选择题 A technician needs to troubleshoot connectivity between two devices located on the same network. Which of the following BEST describes the type of protocol being used?（）
单项选择题 Which of the following methods can move files in clear text and can be easily intercepted?（）