auto commit

2019-02-22 13:35:02 +08:00 · 2019-02-22 13:35:02 +08:00 · c6f2065149
commit c6f2065149
parent 7a0e85f828
29 changed files with 9 additions and 7 deletions
--- a/docs/notes/pics/11_200.png
+++ b/docs/notes/pics/11_200.png
--- a/docs/notes/pics/1_200.png
+++ b/docs/notes/pics/1_200.png
--- a/docs/notes/pics/2_200.png
+++ b/docs/notes/pics/2_200.png
--- a/docs/notes/pics/2_2001550810366269.png
+++ b/docs/notes/pics/2_2001550810366269.png
--- a/docs/notes/pics/3_200.png
+++ b/docs/notes/pics/3_200.png
--- a/docs/notes/pics/3_2001550810442775.png
+++ b/docs/notes/pics/3_2001550810442775.png
--- a/docs/notes/pics/4_2001550810732828.png
+++ b/docs/notes/pics/4_2001550810732828.png
--- a/docs/notes/pics/5_200.png
+++ b/docs/notes/pics/5_200.png
--- a/docs/notes/pics/5_2001550810982206.png
+++ b/docs/notes/pics/5_2001550810982206.png
--- a/docs/notes/pics/6_2001550811175246.png
+++ b/docs/notes/pics/6_2001550811175246.png
--- a/docs/notes/pics/7_2001550811502556.png
+++ b/docs/notes/pics/7_2001550811502556.png
--- a/docs/notes/pics/8_200.png
+++ b/docs/notes/pics/8_200.png
--- a/docs/notes/pics/8_2001550812038190.png
+++ b/docs/notes/pics/8_2001550812038190.png
--- a/docs/notes/pics/9_200.png
+++ b/docs/notes/pics/9_200.png
--- a/docs/notes/计算机网络.md
+++ b/docs/notes/计算机网络.md
@ -66,19 +66,21 @@

 互联网服务提供商 ISP 可以从互联网管理机构获得许多 IP 地址，同时拥有通信线路以及路由器等联网设备，个人或机构向 ISP 缴纳一定的费用就可以接入互联网。

-<div align="center"> <img src="pics/46cec213-3048-4a80-aded-fdd577542801.jpg" width="500"/> </div><br>
+<div align="center"> <img src="pics/7_2001550811502556.png" width="500"/> </div><br>

 目前的互联网是一种多层次 ISP 结构，ISP 根据覆盖面积的大小分为第一层 ISP、区域 ISP 和接入 ISP。互联网交换点 IXP 允许两个 ISP 直接相连而不用经过第三个 ISP。

-<div align="center"> <img src="pics/168e893c-e4a0-4ba4-b81f-9d993483abd0.jpg" width="500"/> </div><br>
+<div align="center"> <img src="pics/8_2001550812038190.png" width="500"/> </div><br>

 ## 主机之间的通信方式

 - 客户-服务器（C/S）：客户是服务的请求方，服务器是服务的提供方。

+<div align="center"> <img src="pics/2_2001550810366269.png"/> </div><br>
+
 - 对等（P2P）：不区分客户和服务器。

-<div align="center"> <img src="pics/2ad244f5-939c-49fa-9385-69bc688677ab.jpg" width=""/> </div><br>
+<div align="center"> <img src="pics/3_2001550810442775.png"/> </div><br>

 ## 电路交换与分组交换

@ -96,7 +98,7 @@

 总时延 = 排队时延 + 处理时延 + 传输时延 + 传播时延

-<div align="center"> <img src="pics/f71125b7-f7cb-4a96-9bf0-902bce9487f0.jpg" width="600"/> </div><br>
+<div align="center"> <img src="pics/4_2001550810732828.png" width="600"/> </div><br>

 ### 1. 排队时延

@ -124,11 +126,11 @@

 ## 计算机网络体系结构

-<div align="center"> <img src="pics/7fa66f48-bc42-4b98-93c2-56b20feaa990.png" width="500"/> </div><br>
+<div align="center"> <img src="pics/5_2001550810982206.png" width="500"/> </div><br>

 ### 1. 五层协议

-  **应用层** ：为特定应用程序提供数据传输服务，例如 HTTP、DNS 等。数据单位为报文。
+-  **应用层** ：为特定应用程序提供数据传输服务，例如 HTTP、DNS 等协议。数据单位为报文。

 -  **传输层** ：为进程提供通用数据传输服务。由于应用层协议很多，定义通用的传输层协议就可以支持不断增多的应用层协议。运输层包括两种协议：传输控制协议 TCP，提供面向连接、可靠的数据传输服务，数据单位为报文段；用户数据报协议 UDP，提供无连接、尽最大努力的数据传输服务，数据单位为用户数据报。TCP 主要提供完整性服务，UDP 主要提供及时性服务。

@ -154,7 +156,7 @@

 TCP/IP 体系结构不严格遵循 OSI 分层概念，应用层可能会直接使用 IP 层或者网络接口层。

-<div align="center"> <img src="pics/7048a730-a2d0-43d1-99ce-f774e4ef1b27.png" width="250"/> </div><br>
+<div align="center"> <img src="pics/6_2001550811175246.png" width="250"/> </div><br>

 ### 4. 数据在各层之间的传递过程

--- a/docs/pics/11_200.png
+++ b/docs/pics/11_200.png
--- a/docs/pics/1_200.png
+++ b/docs/pics/1_200.png
--- a/docs/pics/2_200.png
+++ b/docs/pics/2_200.png
--- a/docs/pics/2_2001550810366269.png
+++ b/docs/pics/2_2001550810366269.png
--- a/docs/pics/3_200.png
+++ b/docs/pics/3_200.png
--- a/docs/pics/3_2001550810442775.png
+++ b/docs/pics/3_2001550810442775.png
--- a/docs/pics/4_2001550810732828.png
+++ b/docs/pics/4_2001550810732828.png
--- a/docs/pics/5_200.png
+++ b/docs/pics/5_200.png
--- a/docs/pics/5_2001550810982206.png
+++ b/docs/pics/5_2001550810982206.png
--- a/docs/pics/6_2001550811175246.png
+++ b/docs/pics/6_2001550811175246.png
--- a/docs/pics/7_2001550811502556.png
+++ b/docs/pics/7_2001550811502556.png
--- a/docs/pics/8_200.png
+++ b/docs/pics/8_200.png
--- a/docs/pics/8_2001550812038190.png
+++ b/docs/pics/8_2001550812038190.png
--- a/docs/pics/9_200.png
+++ b/docs/pics/9_200.png