单项选择题
A. many - to - one
B. one - to - one
C. one - to - many
D. many - to - many
多项选择题 Which three route filtering statements are true?（）
单项选择题 Refer to the exhibit. What must be done on router RTA to ensure that EIGRP works effectively in a Frame Relay multipoint environment?（）
单项选择题 Which statement is correct based upon the following output from the show command on RT1 ? （）