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MCA Articles
Page 69 of 95
What 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 MoreWhat is DWDM?
Dense Wavelength Division Multiplexing (DWDM) is an optical multiplexing technology that combines multiple optical signals of different wavelengths (colors) into a single fiber optic cable. This technology enables transmission of numerous data channels simultaneously over long distances, dramatically increasing the bandwidth capacity of existing fiber infrastructure. DWDM works by using different wavelengths of laser light to carry separate data streams. Each wavelength acts as an independent communication channel, allowing multiple signals to travel through the same physical fiber without interference. Modern DWDM systems can support up to 80 or more channels with 100 GHz (0.8 nm) spacing between wavelengths. ...
Read MoreWhat is the difference between Flow Control and Error Control?
In network communication, both flow control and error control are essential mechanisms that ensure reliable data transmission between devices. While they work together, they serve different purposes in maintaining communication quality. Flow Control Flow control is a technique used to regulate the rate at which data is transmitted between sender and receiver. It prevents the sender from overwhelming the receiver with data that cannot be processed quickly enough, avoiding buffer overflow and data loss. The primary goal of flow control is to match the transmission speed with the receiver's processing capacity. When the sender transmits data faster ...
Read MoreWhat is the difference between DSS and ESS?
Let us begin by learning about Decision Support Systems (DSS) and Executive Support Systems (ESS), two important types of information systems used in business organizations. Decision Support System (DSS) A Decision Support System (DSS) is a computer-based information system that supports business and organizational decision-making activities. It provides tools and capabilities to help decision-makers analyze data and make informed choices, but does not make the actual decisions. DSS collects, organizes, and analyzes business data from multiple sources including databases, files, personal knowledge, and business models. The system helps organizations identify problems, evaluate alternatives, and support decision-making processes ...
Read MoreWhat are the differences between FDMA, TDMA, and CDMA?
Multiple users need to share a communication channel efficiently. FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access), and CDMA (Code Division Multiple Access) are three fundamental techniques that enable multiple users to access the same communication medium without interference. FDMA (Frequency Division Multiple Access) FDMA is an analog technique that divides the available frequency spectrum into separate frequency bands. Each user is assigned a unique frequency band for the entire duration of their communication session. In FDMA, the total bandwidth of the channel is divided into logical channels, with each transmitting device given exclusive control ...
Read MoreWhat is the difference between a Control Plane and a Data Plane?
In networking, routers and switches operate using distinct functional layers called planes. The two most important planes are the control plane and the data plane, each serving different but complementary roles in network operations. Control Plane The control plane is the "brain" of network devices that makes intelligent decisions about how data should flow through the network. It handles routing protocols, maintains routing tables, and establishes communication paths between network devices. Key functions of the control plane include: Routing protocol processing − Running protocols like OSPF, BGP, and RIP to exchange routing information ...
Read MoreWhat is the difference between Email and Gmail?
Electronic mail, commonly known as Email, is a method of exchanging digital messages over computer networks. Understanding the difference between email as a technology and specific email services like Gmail is essential for anyone using digital communication. What is Email? Email stands for Electronic Mail and refers to the transmission of messages over the internet using standardized protocols. Email operates using multiple protocols within the TCP/IP suite: SMTP (Simple Mail Transfer Protocol) − Used to send messages POP3 or IMAP − Used to retrieve messages from mail servers Configuration requirements − ...
Read MoreWhat is the architecture of ISDN
ISDN (Integrated Services Digital Network) is a circuit-switched network technology that provides end-to-end digital connectivity over traditional telephone infrastructure. It bridges the Central Office's local loop and customer premises by using digital switching and transmission techniques to deliver voice, data, video, and fax services over a single line. The term "Integrated Services" refers to ISDN's capability to simultaneously deliver multiple types of communication services—data, voice, video, and fax—over a single digital connection. Multiple devices can be connected to the line and used as needed, making it a versatile solution for both residential and business applications. ISDN Services ...
Read MoreWhat are the design Issues in the Physical Layer?
The physical layer is responsible for transmitting raw bits from one device to another over a physical transmission medium. Unlike higher layers, the physical layer is not concerned with the meaning of bits, but focuses on the physical aspects of signal transmission, connection establishment, and hardware interfaces. Physical Layer Design Issues Connection Management Signal Encoding Data Delivery Fault Detection Data ...
Read MoreWhat is the Platform as a Service (PaaS)?
Platform as a Service (PaaS) is a cloud computing service model that provides a complete development and deployment environment in the cloud. It offers developers a virtualized platform containing all the necessary tools, frameworks, and services to build, test, and deploy applications without managing underlying infrastructure. PaaS delivers computing resources, memory, storage, databases, and application development services through a unified platform. Organizations can use PaaS solutions to create applications for internal use or commercial distribution, eliminating the need to purchase and maintain physical servers, operating systems, and development tools. PaaS Architecture Layers ...
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