From 144736c68f28cbc4fcdfe38b5bc33b797fa9c199 Mon Sep 17 00:00:00 2001
From: LiuKay <kayfen@foxmail.com>
Date: Sun, 11 Jul 2021 16:25:59 +0800
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 docs/network/计算机网络知识总结.md | 2 +-
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 ## 3. 数据链路层（Data Link Layer）
 
-![数据链路层](https://img-blog.csdnimg.cn/img_convert/8d24d1684552fa9cc824ce72b3087637.png)
+![数据链路层](https://www.cloudflare.com/img/learning/ddos/glossary/open-systems-interconnection-model-osi/2-data-link-layer.svg)
 
 ### 3.1. 基本术语