CCNA系列認(rèn)證CCNA(200-120)單項選擇題每日一練(2019.01.17)

來源：考試資料網(wǎng)

1 Which statement describes VRRP object tracking?（）

2 In a switched environment, what does the IEEE 802.1Q standard describe?（）

3 How does using the service password encryption command on a router provide additional security?（）

4 What is known as "one-to-nearest" addressing in IPv6?（）

5 Which command enables RSTP on a switch?（）