--- title: 第六堂 tags: 網路概論筆記 --- ### Internet protocol stack  ### 封包生成  --- ### encapsulation - 封裝 - 將上層的封包放入下層的Data --- ### head - 標頭  --- ### Trailer - 標尾 - 於 Link layer 加上 --- ### 補碼 - 在進入 Link layer 前,當封包位元數不足(非4的倍數)於封包後面補零 --- ### routers - 可執行1-3層 --- ### link switch - 可執行1-2層 --- ### packet transmission 
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