diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -16,4 +16,12 @@ java 知识点学习
    6. [POST] multipart/form-data：文件上传
    7. [POST] application/json：JSON数据
    8. [POST] text/xml：XML数据
-3. spring boot的启动原理
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+3. spring boot的启动原理
+
+1.maven的版本，如何在中央仓库中查看
+2.jsp漏洞问题，带来的问题
+3.常见网络工具攻击
+4.怎么做debug
+5.栈溢出，堆溢出（2M）
+6.技术官方文档，框架源码
+7.jvm tomcat等关系，包含关系，范围
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diff --git a/demo1/web_server.md b/demo1/web_server.md
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--- a/demo1/web_server.md
+++ b/demo1/web_server.md
@@ -8,6 +8,25 @@
       <summary>点击展开</summary>
       网络请求（Network Request）是指计算机（客户端）向服务器发送数据或从服务器获取数据的过程。它是互联网通信的基础，几乎所有网络应用（如网页、APP、API 调用）都依赖网络请求来交换信息。
       </details>
+2. 网络请求中的7层网络模型和4层概念模型
+   * OSI: open system interconnection 开放式系统互联参考模型
+   * OSI 和TCP/IP 的对应关系和协议
+     ![img](https://pic1.zhimg.com/v2-2d62ba265be486cb94ab531912aa3b9c_1440w.jpg)
+   1. 物理层
+      ![img.png](img.png)
+   2. 数据链路层
+      ![img_1.png](img_1.png)
+   3. 网络层
+      ![img_2.png](img_2.png)
+   4. 传输层
+      ![img_3.png](img_3.png)
+   5. 应用层
+      ![img_4.png](img_4.png)
+   6. 网络请求要素
+      ![img_5.png](img_5.png)
+   7. 数据包在传送时的封装和解封装如下所示
+      ![img_6.png](img_6.png)
+
 2. 网络请求的基本概念
     * 组成：客户端（Client）和服务器（Server）
     * 常见的网络请求类型