Lecture Networking essentials plus (3/e) - Chapter 5: Introducing network standards. The main contents of the chapter consist of the following: Open systems interconnection (OSI) model, IEEE standard, device drivers and OSI. | Introducing Network Standards Open Systems Interconnection (OSI) Model IEEE Standard Device Drivers and OSI 1 Open Systems Interconnection (OSI) Model 2 Network Communications OSI Model Windows NT and the OSI Model Network Communications 3 Sending Computer Must: Recognize data Divide it into manageable chunks Add information to determine its location and identify the receiver Add timing and error-checking information Put data on the network and send it Seven-Layer OSI Model 4 OSI Layer Relationships 5 Application Layer (7) Topmost layer Represents services that directly support user applications Window to network services Handles network access, flow control, and error recovery 6 Presentation Layer (6) Network translator On sending end, determines formatting used to exchange data among computers and adds formatting so data can be understood by network On receiving end, translates data from application format to a common intermediate format Manages data compression, . | Introducing Network Standards Open Systems Interconnection (OSI) Model IEEE Standard Device Drivers and OSI 1 Open Systems Interconnection (OSI) Model 2 Network Communications OSI Model Windows NT and the OSI Model Network Communications 3 Sending Computer Must: Recognize data Divide it into manageable chunks Add information to determine its location and identify the receiver Add timing and error-checking information Put data on the network and send it Seven-Layer OSI Model 4 OSI Layer Relationships 5 Application Layer (7) Topmost layer Represents services that directly support user applications Window to network services Handles network access, flow control, and error recovery 6 Presentation Layer (6) Network translator On sending end, determines formatting used to exchange data among computers and adds formatting so data can be understood by network On receiving end, translates data from application format to a common intermediate format Manages data compression, translation, encryption I/O redirectors work to redirect resources to a server 7 Session Layer (5) Allows two applications on different computers to open, use, and close connections Performs name recognition and provides security Provides synchronization by placing checkpoints in the data stream Implements dialog control between communication processes 8 Transport Layer (4) Sending end: repackages message, divides long messages to ship properly over determined route and arrive error-free Receiving end: unpacks message, reassembles it, and acknowledges receipt Provides flow control, error handling, and solves transmission problems 9 Network Layer (3) Addresses the package using network address scheme Determines the best route on the network based on network conditions, priority of service Performs packet switching, routing, traffic management, and controls congestion of data 10 Data-Link Layer (2) Sending end: sends data frames from network layer to physical layer Receiving end: packages raw .
