[請問] 網路封包傳送原理:－2016 台北日本料理推薦 , 台北日本料理吃到飽 , 台北日本料理名店 , 台北日本料理吃到飽推薦 , 台北日本料理推薦2014

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[請問] 網路封包傳送原理

Oct 20th 2013, 10:11, by forkome

作者forkome (初心者)

看板ask

標題[請問] 網路封包傳送原理

時間Sun Oct 20 10:10:59 2013

各位大大們好~小弟想請教網路封包傳送原理問題資料A的封包□ 資料B的封包● 書上有提到送收雙方要同步而且一個檔案會拆成數個封包傳送再重組故小弟想像成當我再下載兩個檔案時封包傳遞會是交錯式傳送嗎？例如 □□●□●●□□●● 最後Physical Level會將封包組成資料A□□□□□ 資料B●●●●● 我這樣的觀念是對的嗎？另外想再請教大大們為何網路訊號可以從聰明的知道雙方使用什麼編碼來同步呢 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 124.11.130.248

推 wuliou:傳送的順序跟接到的順序不一定一樣 10/20 10:14

→ wuliou:所以封包會有編號方便接收端把資料重組回去 10/20 10:14

推 potter1529:所有封包在經過OSI每一層都會加上一個Header(標頭) 10/20 10:19

→ potter1529:所以原本的封包□會變成(H(H(H(H(H□)))))...之類的 10/20 10:19

→ potter1529:封包的資訊包括大小，組成順序，biterrorate之類的會看 10/20 10:20

→ potter1529:Header的資訊做判斷。另外傳送失敗會有一個計時器，在 10/20 10:20

→ potter1529:比如說每10e-4秒沒有收到的話就會放棄封包(要求傳送端 10/20 10:21

→ potter1529:重傳)，因為傳送中一定會有許多錯誤，所以順序絕對不是 10/20 10:21

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