互联网络的高速发展给人们的生活带来了极大的方便,但网络黑客的横行却让许多人深受其害,因此我们每个网络用户都有必要掌握一些网络安全的常识和手段。 The rapid development of the Internet has brought great convenience to people’s lives. However, the rampant network hacking has left many people deeply affected. Therefore, it is necessary for each of our Internet users to acquire some common sense and means of network security.