CCNA系列認(rèn)證CCNA(640-553)單項(xiàng)選擇題每日一練(2019.01.21)

來源：考試資料網(wǎng)

1 Please choose the correct description about Cisco Self-Defending Network characteristics.（）

2 Which method is of gaining access to a system that bypasses normal security measures？（）

3 What is a static packet-filtering firewall used for ？（）

4 Which item is the great majority of software vulnerabilities that have been discovered？（）

5 Which example is of a function intended for cryptographic hashing？（）