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Articles by Ginni
Page 12 of 124
What are the goals of Computer Network?
The main goals of computer networks are to improve efficiency, reduce costs, and enhance communication capabilities across organizations and individuals. These fundamental objectives drive the design and implementation of modern network infrastructure. Key Goals of Computer Networks Resource Sharing Cost Savings High Reliability Enhanced Performance Communication Medium ...
Read MoreWhat are the Network Security threats and attacks?
Network security threats and attacks pose significant risks to organizations and individuals alike. Understanding these threats is crucial for implementing effective security measures and protecting valuable data and systems. Types of Network Security Threats Physical and Environmental Threats Natural disasters such as earthquakes, floods, lightning, and fires can cause severe damage to computer systems and network infrastructure. Human-caused disasters like riots, wars, and terrorist attacks also fall into this category, as they can physically destroy or damage network components and facilities. Malicious Software Attacks Viruses are harmful code developed by attackers that can infiltrate systems ...
Read MoreWhat is the difference between Point to Point Link and Star Topology Network?
Network topology defines how devices are connected and communicate within a network. Two fundamental approaches are Point to Point Link and Star Topology Network, each serving different connectivity requirements and use cases. Point to Point Link A Point to Point Link is the simplest network topology that directly connects two nodes using a dedicated communication channel. The entire bandwidth of the connecting medium is reserved exclusively for communication between these two devices. Point to Point Link Node A Dedicated Link ...
Read MoreWhat is the difference between WDM and CWDM?
Wavelength Division Multiplexing (WDM) is a fiber optic technology that combines multiple optical signals of different wavelengths (colors) into a single composite signal for transmission over optical fiber. This technique dramatically increases the capacity of fiber optic cables by allowing multiple data streams to travel simultaneously on the same physical medium. WDM uses a prism or optical multiplexer to combine light waves from various sources, and a demultiplexer at the receiving end to separate the individual wavelengths. This technology is widely used in SONET networks and long-distance telecommunications. WDM Principle: Multiple Wavelengths on Single ...
Read MoreWhat is the difference between LAN and CAN?
Understanding the differences between LAN (Local Area Network) and CAN (Campus Area Network) is essential for network planning and implementation. While both serve to connect devices and facilitate communication, they differ significantly in scope, coverage, and applications. What is LAN? A Local Area Network (LAN) is a network that connects devices within a limited geographical area, such as a single building, office, or home. LANs can be wired (using Ethernet cables) or wireless (using Wi-Fi technology). Wireless LAN has become one of the fastest-developing technologies, commonly deployed in college campuses, office buildings, hospitals, and public areas. The ...
Read MoreWhat is Computer Network Architecture?
A network model represents the organization of multiple computers in a network. It describes how individual computers are interconnected and communicate with each other to share resources and services. Computer network architecture defines the structural design and operational framework that governs how networked systems interact. Let's explore the main types of network architectures. Centralized Computing Architecture In centralized computing architecture, one powerful computer (mainframe) serves multiple low-powered client devices. All processing power and data storage are concentrated in the central server. Central processing − All computational tasks are performed by the mainframe computer. Terminal connections ...
Read MoreWhat are the advantages and disadvantages of Li-Fi?
Li-Fi (Light Fidelity) is a wireless communication technology that uses visible light as a medium to transmit data. Unlike traditional Wi-Fi that relies on radio waves, Li-Fi employs subtle fluctuations in LED light to send information from transmitter to receiver. The technology works by rapidly switching LED lights on and off at imperceptible speeds, creating binary codes through these fluctuations. A photodetector receives these light signals and decodes them back into digital data. Li-Fi can achieve speeds up to 100 Mbps in standard implementations, with parallel transmission potentially reaching over 10 Gbps. Li-Fi Communication ...
Read MoreExplain the types of ETHERNET Cable.
There are various types of Ethernet cables that have evolved over time to meet different networking requirements. Each type offers distinct characteristics in terms of data speed, cable length, topology, and physical medium used. 10Base5 (Thick Ethernet) The first standard defined in IEEE 802.3 is 10Base5, also known as Thick Ethernet or Thicknet. It uses a bus topology with baseband signaling and thick coaxial cable. The data speed is 10 Mbps with a maximum segment length of 500 meters. The total bus length cannot exceed 2, 500 meters, allowing only five segments. Each station must be separated by ...
Read MoreWhat is Client-Server Architecture in Computer Network?
In Client-Server Architecture, a specific computer designated as a server provides various services to other computers known as clients. The server acts as a service provider, while the client acts as a service requester. When a client requests information from the server, the server processes the request and responds with the appropriate data or service. Client-Server Architecture Client 1 Client 2 Server Provides ...
Read MoreWhat is the difference between WDM and DWDM?
First, let us learn about Wavelength Division Multiplexing (WDM) and then explore its key variant, Dense Wavelength Division Multiplexing (DWDM), to understand their differences and applications. What is WDM? Wavelength Division Multiplexing (WDM) is a technology that combines multiple optical signals of different wavelengths (colors) into a single composite signal for transmission over optical fiber channels. WDM works by using prisms or optical components to multiplex several light waves from different sources, then transmit them simultaneously over the same fiber. The primary application of WDM is in SONET networks where multiple optical fiber lines are multiplexed and ...
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