diff --git a/notes/计算机网络.md b/notes/计算机网络.md
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--- a/notes/计算机网络.md
+++ b/notes/计算机网络.md
@@ -86,7 +86,7 @@
 
 ## 电路交换与分组交换
 
-<div align="center"> <img src="../pics//eebdeb57-8efb-4848-9bb6-97512990897c.jpg"/> </div><br>
+<div align="center"> <img src="../pics//5e8d3c04-d93b-48a7-875e-41ababed00e0.jpg"/> </div><br>
 
 （以上分别为：电路交换、报文交换以及分组交换）
 
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