網絡互連與互聯網

原創 NB-One 2018-12-10 21:08
  • 常用網絡互連設備

1層物理層：中繼器、集線器（多端口中繼器）

2層鏈路層：網橋、交換機（多端口網橋）

3層網絡層：路由器、三層交換機

4層以上：網關

  • 網絡層ip地址

0.0.0.0：不確切地址，一般設備剛啓動尚無IP臨時使用，表示本機。也叫默認路由地址。

 

  • TCP/IP協議分層模型

 

 

 

 

  • TCP協議中的三次握手和四次揮手

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