单项选择题 New service from the telephone company is delivered over fiber, but the technician does not have a fiber module for the router. Which of the following would remedy this issue?（）

单项选择题 Which of the following represents the physical address of a network access card?（）

单项选择题 Office A is located 500 miles (805 kilometers) away from Office B, yet they are on the same private network. Which of the following is MOST likely being used to accomplish this scenario?（）