CCNA系列認證CCNA(640-801)多項選擇題每日一練(2019.04.29)

來源：考試資料網(wǎng)

1 Which of the following correctly describe steps in the OSI data encapsulation process?（）

2 Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet?（）

3 Which Layer 1 devices can be used to enlarge the area covered by a single LAN segment?（）

4 What are two characteristics of "store and forward" switching?（）

5 Which of the protocols below use TCP at the transport layer?（）