He is in Red again, but now, it's AMG !!
Tuesday, April 6, 2010
Celebration time
On incredible Malaysia GP last weekend, Red Bull racing did a great job and bring home 1-2 finish ! Celebration time in on!!
Escaping the Shower
Monday, April 5, 2010
OSI model
First time to study TCP/IP, you must know OSI Model, please refer to below table:
(from Wikipedia- OSI model)
Layer 1 : Physical (實體連接層) - 主要為連接器 (connect), 線材規格 (IEEE 802 project)
Layer 2 : Data Link (資料連接層) - Media access control (媒體存取)，troubleshooting (訊號error)，實體位址
Layer 3 : Network (網路層) - 處理邏輯位址 (Mac address), 路徑，路由 (Routing)
Layer 4 : Transport (傳輸層) - 流量控制，error 處理
Layer 5 : Session (會議層) - 定義連線 (on <--> off), 連線的規則，加入檢查點
Layer 6 : Presentation (展示層) - 格式，編碼，加解密
Layer 7 : Application (應用層) - input / output, IO介面，並依指定協定轉換到下一層
| OSI Model | ||||
|---|---|---|---|---|
| Data unit | Layer | Function | ||
| Host layers | Data | 7. Application | Network process to application | |
| 6. Presentation | Data representation,encryption and decryption | |||
| 5. Session | Interhost communication | |||
| Segments | 4. Transport | End-to-end connections and reliability,Flow control | ||
| Media layers | Packet | 3. Network | Path determination andlogical addressing | |
| Frame | 2. Data Link | Physical addressing | ||
| Bit | 1. Physical | Media, signal and binary transmission | ||
Layer 1 : Physical (實體連接層) - 主要為連接器 (connect), 線材規格 (IEEE 802 project)
Layer 2 : Data Link (資料連接層) - Media access control (媒體存取)，troubleshooting (訊號error)，實體位址
Layer 3 : Network (網路層) - 處理邏輯位址 (Mac address), 路徑，路由 (Routing)
Layer 4 : Transport (傳輸層) - 流量控制，error 處理
Layer 5 : Session (會議層) - 定義連線 (on <--> off), 連線的規則，加入檢查點
Layer 6 : Presentation (展示層) - 格式，編碼，加解密
Layer 7 : Application (應用層) - input / output, IO介面，並依指定協定轉換到下一層
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