無線網(wǎng)路（1）-文庫吧
2025-08-25 21:19 本頁面
【正文】 C E B D F Dual Bus A G B E D F C H Snowflake Mesh Dual Bus CGU NDSL LAN12 Network Topologies A E B D C F J G I H K O L N M 橋接器 橋接器 橋接器 Bridged Ring Networks C A B F D E G H ... Hub, Switch or Concentrator Wireless LAN ? CGU NDSL LAN13 Open System Interconnection (OSI) Model ? Physical Layer. Responsible for transmission of bit streams across a particular physical transmission medium. Retransmission is not supported. ? Encoding/Decoding ? Scrambling/Descrambling ? Data Link Layer. Responsible for providing reliable data transmission from one node to another. Provides errorfree transmission of frames. ? Network Layer. Concerned with routing data from one work node to another. Provides routing path selection. ? Establishing/Maintaining/Terminating work connection ? Transport Layer. Responsible for providing data transfer between two end users at an agreed on level of quality. ? Establishing/Maintaining/Terminating transport layer connection CGU NDSL LAN14 Open System Interconnection (OSI) Model ? Session Layer. Providing services used to anize and synchronize the dialog that takes place between users and to manage the data exchange. ? Presentation Layer. Responsible for the presentation of information to the work users. ? Character code translation/ Data conversion ? Data pression/expansion ? Encryption/Decryption ? Application Layer. Provides services to application processes or users. ? File Transfer Protocol (FTP) ? Remote Login (Tel) ? Transaction Server ? Network Management ? WWW Server/VoD Server CGU NDSL LAN15 Open System Interconnection (OSI) Model Seven Layers 應用層 (Application Layer) 表達層 (Presentation Layer) 會議層 (Session Layer) 傳輸層 (Transport Layer) 網(wǎng)路層 (Network Layer) 鏈結層 (Data Link Layer) 實體層 (Physical Layer) CGU NDSL LAN16 Layering Protocols 應用層 表達層 會議層 傳輸層 網(wǎng)路層 鏈結層 實體層 應用層 表達層 會議層 傳輸層 網(wǎng)路層 鏈結層 實體層 應用軟體 X 應用軟體 Y 系統(tǒng) A 系統(tǒng) B 鏈結層通訊協(xié)定 傳輸媒介 網(wǎng)路層通訊協(xié)定 傳輸層通訊協(xié)定 會議層通訊協(xié)定 表達層通訊協(xié)定 應用層通訊協(xié)定 實體層通訊協(xié)定 CGU NDSL LA
教學課件相關推薦
鄂ICP備17016276號-1