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Computer Network Articles
Page 26 of 122
What are Error-Detecting Codes?
Error-detecting codes are a sequence of numbers generated by specific procedures for detecting errors in data that has been transmitted over computer networks. These codes add redundant information to data to help identify transmission errors at the receiving end. When bits are transmitted over computer networks, they are subject to corruption due to interference, noise, and network problems. The corrupted bits lead to spurious data being received by the receiver and are called errors. Error-detecting codes ensure messages are encoded before transmission over noisy channels. The encoding is designed so that the decoder at the receiving end can ...
Read MoreWhat is Interleaving?
Interleaving is a technique used to enhance existing error correcting codes so that they can perform burst error corrections more effectively. It works by rearranging data symbols before transmission to distribute burst errors across multiple codewords. Most error correcting codes (ECCs) are designed to correct random errors caused by additive noise that occurs independently. However, burst errors are errors that occur in sequences or groups, typically caused by defects in storage media or disruption in communication signals due to external factors like lightning. Interleaving modifies how data is organized after encoding by ECCs to handle these burst errors better. ...
Read MoreWhy is software testing a need today?
Software testing has become a critical necessity in today's rapidly evolving digital landscape. As businesses face intense competition and customers demand faster product releases with enhanced features, the importance of delivering high-quality, bug-free software cannot be overstated. The modern market environment creates immense pressure on development teams to release products quickly. However, rushing software to market without proper testing can lead to catastrophic failures, poor user experiences, and significant financial losses. Why Software Testing is Essential Today Software Testing ...
Read MoreWhat is the difference between a search engine friendly and search engine optimised website?
This question often confuses website owners who want to attract traffic quickly. Understanding the difference between search engine friendly and search engine optimized websites is crucial during the development phase, as your developer can build SEO-friendly foundations, while optimization requires ongoing effort. Search Engine Friendly vs Search Engine Optimized A search engine friendly website is built with technical foundations that allow search engines to easily crawl, index, and understand the content. This involves proper HTML structure, clean URLs, fast loading times, mobile responsiveness, and semantic markup. A search engine optimized website goes beyond technical friendliness to actively ...
Read MoreIs Quantum Computing changing the future of our world?
Quantum computing is a revolutionary computational paradigm that harnesses quantum-mechanical phenomena such as superposition and entanglement to process information in fundamentally different ways than classical computers. Unlike traditional digital computers that rely on binary bits, quantum computers use quantum bits (qubits) that can exist in multiple states simultaneously. While classical computing requires data to be encoded into binary digits (bits) that exist in definite states of 0 or 1, quantum computation utilizes qubits which can exist in superpositions of both states. This quantum property enables quantum computers to process vast amounts of information simultaneously, offering exponential computational advantages for ...
Read MoreFletcher's Checksum
Fletcher's checksum is an error-detection technique that uses two checksums to determine single-bit errors in a message transmitted over network channels. It is a block code technique that was devised by John G. Fletcher in the 1970s at Lawrence Livermore Labs, USA. The checksums are created based on the data values in the data blocks to be transmitted and appended to the data. When the receiver gets this data, the checksums are re-calculated and compared with the existing checksums. A non-match indicates an error. The error-detection capabilities of this method are nearly the same as that of Cyclic ...
Read MoreWhat is Polynomial Code?
A polynomial code is a linear code where valid codewords are represented as polynomials that are divisible by a shorter fixed polynomial called the generator polynomial. These codes are fundamental in digital communication systems for error detection and correction during data transmission and storage. The key principle behind polynomial codes is that data bits are treated as coefficients of polynomials, enabling mathematical operations that can detect and correct transmission errors effectively. Types of Polynomial Codes The main types of polynomial codes include: Cyclic Redundancy Code (CRC) − Most commonly used for error detection in networking ...
Read MoreWhat is algorithm for computing the CRC?
Cyclic Redundancy Check (CRC) is a block code that was invented by W. Wesley Peterson in 1961. It is commonly used to detect accidental changes to data transmitted via telecommunications networks and storage devices. CRC involves binary division of the data bits being sent by a predetermined divisor agreed upon by the communicating system. The divisor is generated using polynomials. So, CRC is also called polynomial code checksum. Before sending the message over network channels, the sender encodes the message using CRC. The receiver decodes the incoming message to detect error. If the message is error-free, then it ...
Read MoreWhat is WAN accelerator?
A wide area network accelerator (WAN accelerator) is a hardware component, software, or appliance executing in a virtualized environment that provides caching and optimization of WAN services. A WAN accelerator is also called a WAN optimizer or application accelerator. WAN accelerators are deployed to improve network performance over long-distance connections by reducing bandwidth usage and minimizing latency for data transmission across wide area networks. Working Principle A WAN accelerator provides services to speed up information flow between end users for imparting better network experience. Its primary target is to reduce the data volume to be transmitted through ...
Read MoreWhat is Network Acceleration?
Network acceleration is a set of techniques used to increase the speed of information flow between end users, providing better network performance and user experience. It is also known as WAN optimization or WAN acceleration. Network acceleration becomes crucial when organizations need to optimize data transfer across wide area networks, especially for applications like file transfers, video conferencing, and cloud services that require high bandwidth and low latency. Techniques Used in Network Acceleration Traffic Shaping − Priority is assigned to network traffic based on which bandwidth is allocated to ensure critical applications receive adequate resources. ...
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