| 单词 | Table O-1: OSI Reference Model Layers |
| 释义 | Table O-1: OSI Reference Model Layers Layer Functional Focus 7 Application Semantics: Applications and end user processes such as e-mail, file transfer, and authentication 6 Presentation Syntax: Data format (coding) and display, code conversion, encryption, compression 5 Session Dialog coordination: Establishing, maintaining, coordinating, and terminating dialogues and data exchanges 4 Transport Reliable data transfer: End-to-end error detection and correction, and flow control, ensuring the integrity of the complete datastream 3 Network Routing and relaying: Message routing, error detection, and control of internodal traffic 2 Data Link Technology-specific transfer over a link or channel: Framing, error control, flow control, data sequencing, time-out levels, and data formatting (encoding and decoding) 1 Physical Physical connections: Electrical and mechanical aspects of the interface of a device to a transmission medium See also application layer, data link layer, ISO, ITU-T, network, network architecture, Network Layer, Physical Layer, Presentation Layer, protocol, Session Layer, SNA, software, standard, subnetwork, TCP/IP, Transport Layer, X.200, and x series. 74570c15.qxd 9/11/07 12:26 PM Page 353 |
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