Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles by Ginni
Page 18 of 124
What is the effect of errors in Error Detection?
In data communication, errors during transmission can significantly impact the quality and reliability of communication systems. Understanding the effects of these errors is crucial for designing robust error detection mechanisms. Primary Effects of Transmission Errors Signal Attenuation Attenuation occurs when the signal strength weakens during transmission, causing data loss or corruption. In extreme cases, the signal may become too weak to be properly decoded at the receiving end, resulting in complete data loss. Signal Attenuation Effect Transmitter Receiver ...
Read MoreWhat is Error Correction?
Error correction is a method used in data communication to automatically detect and fix errors at the receiver end without requiring retransmission. Unlike error detection which only identifies errors, error correction enables the receiver to restore the original data by using redundant bits added to the transmitted message. In error correction, each k-bit block of data is combined with redundant bits to create an n-bit codeword (where n > k). A Forward Error Correction (FEC) encoder adds these redundant bits at the transmission end, and the complete codeword is transmitted over the communication channel. ...
Read MoreWhat are Synchronous Protocols?
Synchronous protocols are data communication protocols that maintain a constant timing relationship between the sender and receiver during data transmission. These protocols divide the data stream into fixed-size frames or blocks and use synchronized clocks to ensure accurate data transfer. In synchronous communication, both the transmitter and receiver operate on the same clock frequency, enabling continuous data flow without start and stop bits for each character. This approach is primarily used for high-speed data transmission over long distances where large amounts of data need to be transferred efficiently. Synchronous Data Transmission ...
Read MoreWhat is High-Level Data Link Control (HDLC)?
High-Level Data Link Control (HDLC) is a bit-oriented data link layer protocol standardized by the International Organization for Standardization (ISO). It enables reliable, high-speed communication by providing error detection, flow control, and frame sequencing for data transmission between network devices. HDLC was developed based on IBM's Synchronous Data Link Control (SDLC) protocol. Unlike character-oriented protocols, HDLC can transmit bit strings of variable length, making it more flexible and efficient. The basic unit of data communication in HDLC is called a frame. HDLC Frame Types HDLC defines three types of frames to support different communication modes and configurations: ...
Read MoreExplain the HDLC Operational and Non-Operational Modes
A mode in HDLC defines the relationship between two machines in a network and describes who controls the link. HDLC determines three types of stations: primary, secondary, and combined. A primary station is the controlling station on a connection. It controls the secondary stations and handles data flow and error recovery. A secondary station exists on a connection where there is a primary station. The secondary station is controlled by the primary station and has no explicit authority for maintaining the connection. A combined station combines the functions of both primary and secondary stations, operating as an ...
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 MoreWhat is the difference between E commerce and M commerce?
Electronic commerce and mobile commerce are two interconnected yet distinct forms of digital business transactions. Understanding their differences helps businesses and consumers navigate the evolving digital marketplace effectively. E-Commerce E-Commerce stands for Electronic Commerce, which involves buying and selling goods, products, or services over the internet using any internet-enabled device. E-commerce encompasses all online business transactions including money transfers, fund transfers, and data exchanges conducted through digital networks. These business transactions can be completed through four main models: Business to Business (B2B), Business to Customer (B2C), Customer to Customer (C2C), and Customer to Business (C2B). E-commerce typically ...
Read MoreWhat is the importance of Computer?
A Computer Network is an interconnection of numerous computers to share an operating system, hardware, and information through a transmission mode among them. There is no geographical limitation between computers in a network, allowing global connectivity and resource sharing. Basic Computer Network Structure Node 1 Workstation Server Central Node Node 2 Workstation Node 3 Workstation Node 4 Workstation ...
Read MoreWhat is Distance Vector Routing Algorithm?
The Distance-Vector routing algorithm is a network routing protocol where each router shares its routing table with neighboring routers. It is also known as the Bellman-Ford routing algorithm, named after the researchers who developed it (Bellman 1957, and Ford and Fulkerson, 1962). In this algorithm, each router calculates the shortest distance to every destination network by combining information from its neighbors. The algorithm operates on the principle that each router gradually builds complete network knowledge through iterative information sharing. Key Features Complete network knowledge − Each router maintains and shares information about the entire network ...
Read MoreWhat is the difference between Antivirus and Trojan horse?
Let us begin by understanding what an antivirus is and how it differs from malicious software like Trojan horses. Antivirus Antivirus software is a security program designed to detect, prevent, and remove malicious software from computer systems. It works proactively by scanning files, monitoring system activities, and identifying virus signatures to protect devices from various types of malware threats. Modern antivirus software provides multiple layers of protection including real-time scanning, email protection, web browsing security, and behavioral analysis. It maintains an updated database of known threats and uses heuristic analysis to identify previously unknown malicious patterns. ...
Read More