tailieunhanh - Chapter7 - DATA LINK CONTROL PROTOCOLS

Introduction Data link control layer – often abbreviated simply to data link layer – is concerned with the transfer of data over a serial data link The transmission mode may be either asynchronous or synchronous and based on either a character-oriented or a bit-oriented transmission control protocol The data link layer is fundamental to the operation of all data communication applications | DATA LINK CONTROL PROTOCOLS Introduction Data link control layer – often abbreviated simply to data link layer – is concerned with the transfer of data over a serial data link The transmission mode may be either asynchronous or synchronous and based on either a character-oriented or a bit-oriented transmission control protocol The data link layer is fundamental to the operation of all data communication applications Introduction Depending on the application, the user service provided by the data link layer may be either a simple best-try (connectionless) service or a reliable (connection-oriented) service Introduction The connectionless service means that although error check bits are used to detect errors, any frames that are found to contain transmission errors are simply discarded by the link layer protocol entity. It is also referred to as an unacknowledged service Retransmission becomes a function of a higher layer protocol Introduction The connection-oriented service | DATA LINK CONTROL PROTOCOLS Introduction Data link control layer – often abbreviated simply to data link layer – is concerned with the transfer of data over a serial data link The transmission mode may be either asynchronous or synchronous and based on either a character-oriented or a bit-oriented transmission control protocol The data link layer is fundamental to the operation of all data communication applications Introduction Depending on the application, the user service provided by the data link layer may be either a simple best-try (connectionless) service or a reliable (connection-oriented) service Introduction The connectionless service means that although error check bits are used to detect errors, any frames that are found to contain transmission errors are simply discarded by the link layer protocol entity. It is also referred to as an unacknowledged service Retransmission becomes a function of a higher layer protocol Introduction The connection-oriented service Data link protocol employs error and flow control procedures to provide a reliable service To achieve this, prior to sending any data (information frames), a logical connection between the two data link layer protocol entities is established (using L_Connect service) All data is transfer using a suitable retransmission and flow control protocol When all data has been exchanged, the logical connection is clear (using L_Disconnect service) Introduction Application Environments In some instances the data link protocols are located in the two communicating DTEs, and the protocol is said to operate on an end-to-end basis In others, data link protocols operates over the local link connecting, for example, the DTE to a network, the protocol is said to have only local significance Application Environments The data link topology may be Point-to-point circuit Direct physical connection Operates on an end-to-end basis Application Envirionments Application Environments The .

• Quản trị mạng
• Data link control layer
• Data link control protocols
• Data Communication Concepts
• logical link control
• Open Systems Interconnection
• connection oriented service
• Data Link layer
• protocol layer
• moving of data
• telecommunication protocols
• divides output data
• Network Fundamentals
• Lecture Network Fundamentals
• OSI Data Link layer
• Data Link layer protocols
• Media access control methods
• Accessing the media
• CCNA Exploration
• Lecture CCNA Exploration 4
• Lesson Instructor materials
• Instructor materials
• Data link layer supports
• Best practices
• Explain how media access control
• Data communications
• Lecture Data communications
• Physical layer
• Data link control
• Noiseless channels
• Congestion control
• Data traffic
• Mạng máy tính
• Bài giảng Mạng máy tính
• Link Layer
• Ảo hóa các mạng
• PPP Data Control Protoco
• Mạng của các mạng
• Business data communications
• Data communications networks
• Data communications system
• Media access control
• Hop to hop delivery
• Error control
• Computer networks
• The physical layer
• The data link layer
• The medium access control sublayer
• The channel allocation problem
• Multiple access protocols