Cisco joke

Hello, first of all, I understand. I have been here ever since. Secondly, I want to share my learning methods with you. I passed it on 20 15 and listened to several popular online classes at that time. It's free. After reviewing for two months, I will probably finish reading the book before taking classes, and then take classes at the speed of 1.5-2 times. If I listen too slowly, I will lose my mind and only stop once when I listen. Write the main knowledge thread and the corresponding key knowledge points on paper quickly, and pay attention to writing levels, such as the headline is xx, the following subheadings are 1, 1, 2, ... 2, ... and so on. After writing, you will find that the original context of knowledge is clear. The joke told by the teacher was originally intended to illustrate the problem, but in fact there are only a few key knowledge points, which are easy to remember.

In addition, there are many learning methods in Zhihu and various forums. Please ask me again. Come on ~