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?（）
A.Supernetting B.Dynamic C.Subletting D.Convergence
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?（）
单项选择题 At which of the following layers does the TFTP protocol operate?（）
