Error Recovery Data Link Layer
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Introduction[edit] Data link layer is layer 2 in OSI model. It is responsible for communications between adjacent network nodes. It handles error control in data link layer the data moving in and out across the physical layer. It also error detection in data link layer provides a well defined service to the network layer. Data link layer is divided into two sub
Error Correction In Data Link Layer
layers. The Media Access Control (MAC) and logical Link Control (LLC). Data-Link layer ensures that an initial connection has been set up, divides output data into data frames,
Data Link Layer Error Checking
and handles the acknowledgements from a receiver that the data arrived successfully. It also ensures that incoming data has been received successfully by analyzing bit patterns at special places in the frames. In the following sections data link layer's functions- Error control and Flow control has been discussed. After that MAC layer is explained. Multiple access protocols are data link layer protocols explained in the MAC layer section. Error Control[edit] Network is responsible for transmission of data from one device to another device. The end to end transfer of data from a transmitting application to a receiving application involves many steps, each subject to error. With the error control process, we can be confident that the transmitted and received data are identical. Data can be corrupted during transmission. For reliable communication, error must be detected and corrected. Error control is the process of detecting and correcting both the bit level and packet level errors. Types of Errors Single Bit Error The term single bit error means that only one bit of the data unit was changed from 1 to 0 and 0 to 1. Burst Error In term burst error means that two or more bits in the data unit were changed. Burst error is also called packet level error, where errors like packet loss, duplication, reordering. Error Detection Error detection is the process of detecting the error during the transmission b
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Data Link Layer Devices
DCN - Physical Layer Introduction DCN - Digital Transmission DCN - Analog data link layer ppt Transmission DCN - Transmission media DCN - Wireless Transmission DCN - Multiplexing DCN - Network Switching Data data link layer protocols list Link Layer DCN - Data Link Layer Introduction DCN - Error detection and Correction DCN - Data Link Control & Protocols Network Layer DCN - Network Layer Introduction https://en.wikibooks.org/wiki/Communication_Networks/Error_Control,_Flow_Control,_MAC DCN - Network Addressing DCN - Routing DCN - Internetworking DCN - Network Layer Protocols Transport Layer DCN - Transport Layer Introduction DCN - Transmission Control Protocol DCN - User Datagram Protocol Application Layer DCN - Application Layer Introduction DCN - Client-Server Model DCN - Application Protocols DCN - Network Services DCN Useful Resources DCN - Quick Guide https://www.tutorialspoint.com/data_communication_computer_network/error_detection_and_correction.htm DCN - Useful Resources DCN - Discussion Selected Reading Developer's Best Practices Questions and Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is Who DCN - Error Detection & Correction Advertisements Previous Page Next Page There are many reasons such as noise, cross-talk etc., which may help data to get corrupted during transmission. The upper layers work on some generalized view of network architecture and are not aware of actual hardware data processing.Hence, the upper layers expect error-free transmission between the systems. Most of the applications would not function expectedly if they receive erroneous data. Applications such as voice and video may not be that affected and with some errors they may still function well. Data-link layer uses some error control mechanism to ensure that frames (data bit streams) are transmitted with certain level of accuracy. But to understand how errors is controlled, it is essential to know what types of errors may occur. Types of Errors There may be three types of errors: Single bit error
data-link layer in The Network Encyclopedia. data-link layer Layer 2 of the Open Systems Interconnection (OSI) reference model, which converts frames of data into raw bits for the physical layer http://www.thenetworkencyclopedia.com/entry/data-link-layer/ and is responsible for framing, flow control, error correction, and retransmission of frames. MAC addresses are used at this layer, and bridges and network interface cards (NICs) operate at this layer. The data-link layer establishes and maintains the data link for the network layer above it. It ensures that data is transferred reliably between two stations on the network. A number of protocols can be data link implemented at this layer depending on whether you are establishing local area network (LAN) or wide area network (WAN) connections between stations. Data-link protocols are responsible for functions such as addressing, frame delimiting and sequencing, error detection and recovery, and flow control. For LANs, the Project 802 standards of the Institute of Electrical and Electronics Engineers (IEEE) separate the data-link layer into two sublayers: The logical data link layer link control (LLC) layer, the upper of the two layers, which is responsible for flow control, error correction, and resequencing functions for connection-oriented communication, but which also supports connectionless communication The media access control (MAC) layer, the lower of the two layers, which is responsible for providing a method for stations to gain access to the medium Graphic D-5. Data-link layer. Examples of data-link protocols for local area networking include the following: IEEE 802.3, which provides the Carrier Sense Multiple Access with Collision Detection (CSMA/CD) access method for baseband Ethernet networks IEEE 802.5, which provides the token-passing access method for baseband token ring implementations For WANs, data-link layer protocols encapsulate LAN traffic into frames suitable for transmission over WAN links. Common data-link encapsulation methods for WAN transmission include the following: Point-to-point technologies such as Point-to-Point Protocol (PPP) and High-level Data Link Control (HDLC) protocol Multipoint technologies such as frame relay, Asynchronous Transfer Mode (ATM), Switched Multimegabit Data Services (SMDS), and X.25 Featured DHCP Maintenance Guide RAID RAID 0 RAID 1 RAID 5 Migrating Apache to IIS Migrating with the IIS Tool Migrating web sites manually Configuring IIS Properties Changes to the Metabase properties Disruptiv
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