- Data Comm & Networks Home
- DCN - Overview
- DCN - What is Computer Network
- DCN - Uses of Computer Network
- DCN - Computer Network Types
- DCN - Network LAN Technologies
- DCN - Computer Network Models
- DCN - Computer Network Security
- DCN - Components
- DCN - Connectors
- DCN - Switches
- DCN - Repeaters
- DCN - Gateways
- DCN - Bridges
- DCN - Socket
- DCN - Network Interface Card
- DCN - NIC: Pros and Cons
- DCN - Network Hardware
- DCN - Network Port
- Computer Network Topologies
- DCN - Computer Network Topologies
- DCN - Point-to-point Topology
- DCN - Bus Topology
- DCN - Star Topology
- DCN - Ring Topology
- DCN - Mesh Topology
- DCN - Tree Topology
- DCN - Hybrid Topology
- Physical Layer
- DCN - Physical Layer Introduction
- DCN - Digital Transmission
- DCN - Analog Transmission
- DCN - Transmission media
- DCN - Wireless Transmission
- DCN - Transmission Impairments
- DCN - Multiplexing
- DCN - Network Switching
- Data Link Layer
- DCN - Data Link Layer Introduction
- DCN - Data Link Control & Protocols
- DCN - RMON
- DCN - Token Ring Network
- DCN - Hamming Code
- DCN - Byte Stuffing
- DCN - Channel Allocation
- DCN - MAC Address
- DCN - Cyclic Redundancy Checks
- DCN - Error Control
- DCN - Flow Control
- DCN - Framing
- DCN - Error Detection & Correction
- DCN - Error Correcting Codes
- DCN - Parity Bits
- Network Layer
- DCN - Network Layer Introduction
- DCN - Network Addressing
- DCN - Routing
- DCN - Internetworking
- DCN - Network Layer Protocols
- DCN - Routing Information Protocol
- DCN - Border Gateway Protocol
- DCN - OSPF Protocol
- DCN - Network Address Translation
- DCN - Network Address Translation Types
- Transport Layer
- DCN - Transport Layer Introduction
- DCN - Transmission Control Protocol
- DCN - User Datagram Protocol
- DCN - Congestion Control
- DCN - TCP Service Model
- DCN - TLS Handshake
- DCN - TCP Vs. UDP
- Application Layer
- DCN - Application Layer Introduction
- DCN - Client-Server Model
- DCN - Application Protocols
- DCN - Network Services
- DCN - Virtual Private Network
- DCN - Load Shedding
- DCN - Optimality Principle
- DCN - Service Primitives
- DCN - Services of Network Security
- DCN - Hypertext Transfer Protocol
- DCN - File Transfer Protocol
- DCN - Secure Socket Layer
- Network Protocols
- DCN - ALOHA Protocol
- DCN - Pure ALOHA Protocol
- DCN - Sliding Window Protocol
- DCN - Stop and Wait Protocol
- DCN - Link State Routing
- DCN - Link State Routing Protocol
- Network Algorithms
- DCN - Shortest Path Algorithm
- DCN - Routing Algorithm
- DCN - Leaky Bucket Algorithm
- Wireless Networks
- DCN - Wireless Networks
- DCN - Wireless LANs
- DCN - Wireless LAN & IEEE 802.11
- DCN - IEEE 802.11 Wireless LAN Standards
- DCN - IEEE 802.11 Networks
- Multiplexing
- DCN - Multiplexing & Its Types
- DCN - Time Division Multiplexing
- DCN - Synchronous TDM
- DCN - Asynchronous TDM
- DCN - Synchronous Vs. Asynchronous TDM
- DCN - Frequency Division Multiplexing
- DCN - TDM Vs. FDM
- DCN - Code Division Multiplexing
- DCN - Wavelength Division Multiplexing
- Miscellaneous
- DCN - Shortest Path Routing
- DCN - B-ISDN Reference Model
- DCN - Design Issues For Layers
- DCN - Selective-repeat ARQ
- DCN - Flooding
- DCN - E-Mail Format
- DCN - Cryptography
- DCN - Unicast, Broadcast, & Multicast
- DCN - Network Virtualization
- DCN - Flow Vs. Congestion Control
- DCN - Asynchronous Transfer Mode
- DCN - ATM Networks
- DCN - Synchronous Vs. Asynchronous Transmission
- DCN - Network Attacks
- DCN - WiMax
- DCN - Buffering
- DCN - Authentication
- DCN Useful Resources
- DCN - Quick Guide
- DCN - Useful Resources
Error Correcting Codes in Computer Networks
Error Correcting Codes (ECC)
Error-correcting codes (ECC) are a sequence of numbers generated by specific algorithms for detecting and removing errors in data that has been transmitted over noisy channels.
When bits are transmitted over the computer network, they are subject to get corrupted due to interference and network problems. The corrupted bits leads to spurious data being received by the receiver and are called errors.
Error correcting codes ascertain the exact number of bits that has been corrupted and the location of the corrupted bits, within the limitations in algorithm. This method of correcting errors at the receivers end is called forward error correction.
Types of Error Correcting Codes
ECCs can be broadly categorized into two types, block codes and convolution codes.
-
Block codes The message is divided into fixed-sized blocks of bits, to which redundant bits are added for error detection or correction.
-
Convolutional codes The message comprises of data streams of arbitrary length and parity symbols are generated by the sliding application of a Boolean function to the data stream.
Common Error Correcting Codes
There are four popularly used error correction codes.
-
Hamming Codes It is a block code that is capable of detecting up to two simultaneous bit errors and correcting single-bit errors.
-
Binary Convolution Code Here, an encoder processes an input sequence of bits of arbitrary length and generates a sequence of output bits.
-
Reed - Solomon Code They are block codes that are capable of correcting burst errors in the received data block.
-
Low-Density Parity Check Code It is a block code specified by a parity-check matrix containing a low density of 1s. They are suitable for large block sizes in very noisy channels.