单项选择题
Which of the following is MOST commonly powered using PoE?（）
A.Routers B.Switches C.Laptops D.Access points
单项选择题 Which of the following is the name of the routing update process involved when a change occursin the routing environment?（）
单项选择题 Which of the following is used by RADIUS to encrypt messages between the server and the client?（）
单项选择题 Which of the following is an EGP routing protocol?（）
