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Articles on Trending Technologies
Technical articles with clear explanations and examples
What 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 DIX Standard?
DIX standard is a popular standard for Ethernet that was introduced in 1978. The name DIX is an abbreviation of the three organizations who developed it: DEC (Digital Equipment Corporation), Intel, and Xerox. DIX Ethernet provides a data transmission speed of 10 Mbps. DIX Ethernet is also known as Ethernet II framing and remains one of the most widely used Ethernet frame formats in modern networks. It differs from IEEE 802.3 framing primarily in its Type field, which identifies the upper-layer protocol. DIX Ethernet Frame Structure The DIX Ethernet frame consists of several distinct fields, each serving ...
Read MoreFunctions of the Network Layer
The network layer or layer 3 of the OSI model is responsible for delivering data packets from source to destination across multiple hops or links. It also controls the operation of subnets and manages logical addressing for end-to-end communication. The network layer acts as an intermediary between the transport layer above and the data link layer below, ensuring reliable packet delivery across interconnected networks. Network Layer Functions Source Host Transport ...
Read MoreDifference between MediaFire and SecureSafe
MediaFire and SecureSafe are two distinct cloud storage platforms serving different user needs. MediaFire launched in 2006 focuses on easy file sharing and accessibility, while SecureSafe, introduced in 2009, emphasizes security and data protection for sensitive information. MediaFire offers 10 GB of free storage with straightforward sharing capabilities, making it popular for general file storage needs. In contrast, SecureSafe provides robust encryption and security features, positioning itself as a secure vault for confidential data, passwords, and sensitive documents. What is MediaFire? MediaFire is a cloud-based file hosting service that allows users to store, sync, and share digital ...
Read MoreWhat is simplex mode of transmission in computer networks?
Simplex mode is a data transmission method where communication flows in only one direction between devices. In this unidirectional communication, one device acts as a sender while the other acts as a receiver, but they cannot switch roles. Transmission modes define how data flows between communicating devices and operate at the physical layer of the network model. The transmission medium and communication channel determine the directional capabilities of the data flow. Types of Transmission Modes There are three primary transmission modes used in computer networks: Simplex Mode − Unidirectional communication Half-duplex Mode − Bidirectional but ...
Read MoreWhat is Thick Ethernet?
Thick Ethernet was the first commercially available form of cabling supported by Ethernet. It is technically known as 10BASE-5, where 10 represents the maximum throughput of 10 Mbps, BASE denotes the use of baseband transmission, and 5 refers to the maximum segment length of 500 meters (1, 640 ft). This type of cabling allows up to 100 stations to be connected using vampire taps, which are special connectors that pierce the cable to establish electrical contact. All stations share a single collision domain, meaning only one device can transmit at a time to avoid data collisions. ...
Read MoreNetwork Layer Design Issues
The network layer or layer 3 of the OSI (Open Systems Interconnection) model is concerned with delivery of data packets from the source to the destination across multiple hops or links. It is the lowest layer that is concerned with end−to−end transmission. The designers who are concerned with designing this layer need to address certain critical issues that encompass the services provided to the upper layers as well as internal design of the layer. The design issues can be elaborated under four heads: Store−and−Forward Packet Switching Services to Transport Layer Providing Connection Oriented Service Providing Connectionless Service ...
Read MoreWhat is the difference between Web Conferencing and Video Conferencing?
Both web conferencing and video conferencing are online communication technologies that enable remote collaboration, but they serve different purposes and offer distinct capabilities. Web Conferencing Web conferencing is an umbrella term for various technologies that allow multiple people from different locations to hold live meetings over the Internet using TCP/IP connections. Originally developed as an enhanced audio bridge with visual elements, web conferencing focuses on content sharing and presentation delivery. Web conferencing excels at broadcasting information from one or few presenters to many participants. Key features include screen sharing, document collaboration, presentation tools, recording capabilities, and basic ...
Read MoreCable Television
Cable television is a television delivery system that transmits programming to subscribers through coaxial or fiber optic cables. Unlike terrestrial television that uses radio waves transmitted through the air, or satellite television that relies on communication satellites, cable TV provides a direct wired connection from the service provider to the subscriber's premises. Cable television systems use a tree and branch network topology, where signals originate from a central headend facility and are distributed through a hierarchical network of cables to reach individual homes and businesses. Cable Television Network Architecture ...
Read MoreStore – and – Forward Packet Switching
In telecommunications, store-and-forward packet switching is a technique where data packets are stored in each intermediate node before being forwarded to the next node. The intermediate node verifies that the packet is error-free before transmitting, thus ensuring data integrity. The network layer typically operates using store-and-forward packet switching. Working Principle The source node delivers its packet to the nearest router. The packet is stored in the router until it has fully arrived and its checksum is verified for error detection. Once verified, the packet is transmitted to the next router. This process continues at each router until the ...
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