单项选择题 On a 3-port CT3 card, how many HDLC controllers does each port support?（）

单项选择题 You would like to configure an Ethernet interface with the following characteristics: Which set of configuration commands accurately completes this task?（）

单项选择题 You would like to configure an Ethernet interface with the following characteristics: Fast Which set of configuration commands accurately completes this task?（）