单项选择题
Which of the following network devices uses NAT to convert private IP addresses into public IPaddresses?（）
A.NAS B.Firewall C.Hub D.Bridge
单项选择题 Which of the following ports is used for HTTPS traffic by default?（）
单项选择题 Which of the following ports is used by default for IMAP traffic?（）
单项选择题 Incorrect menu options continue to be selected on a device. Which of the following MUST becalibrated to help correct the issue?（）
