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Articles on Trending Technologies
Technical articles with clear explanations and examples
What factors affect Latency and Jitter in Wireless Communications?
Latency is common in both wired and wireless systems. It is a quality of service (QoS) parameter – it acts as one of the performances determining factors of the wired or wireless communication link of interest. Different applications require different levels of latency. In simpler terms, latency refers to how quick the data is transferred from the source (or the sender) to the destination (or the receiver). Latency takes the unit of time. Link speeds are often specified in milliseconds (ms), microseconds (µs), nanoseconds (ns) and so on.Latency Is a Quality-of-Service ParameterNumeric example of latencyLet us look into an example ...
Read MoreWhat is Modulation in Wireless Communications?
Overview of Modulation in Wireless CommunicationsLike bidding in auction, telecom service providers also auction frequency bands. Huge investments are made while bidding even smaller bands- say a few megahertz. Bands in the very basic sense mean the 'air' around us. Air is a wireless ‘channel’/ ‘transmission medium’ that carries our data confined the electric and magnetic fields of the electromagnetic waves.Therefore, bands mean the frequency ranges over which each service provider renders services to its subscribers. Since a huge amount of money is invested, effective utilization needs to be ensured. Technically, we need to use 'effective modulation techniques' for this ...
Read MoreHow are Spectrum and Bandwidth defined in Wireless Communications?
Definition of spectrumSpectrum refers to the entire range of frequencies right from the starting frequency (the lowest frequency) to the ending frequency (the highest frequency). Spectrum basically refers to the entire group of frequencies.Example of spectrum- Electromagnetic SpectrumThe electromagnetic spectrum is one good example. The electromagnetic (EM) spectrum covers frequencies right from zero (DC) to gamma band frequencies. This spectrum includes the human voice frequency band (audio band), ISM (Industrial Scientific Medical) band and optical frequency bands.Numeric example- Microwave radiation spectrumMicrowave radiations span in frequency from 300 MHz to 300 GHz. What is the spectrum of microwave radiation?Spectrum refers to ...
Read MoreHow Do You Define Bandwidth and Throughput in Wireless Communications?
A wireless communication link is specified or characterized in terms of some performance metrics. We call these performance metrics as 'Quality of Service' (QoS) metrics or parameters. Some of the major QoS parameters include bandwidth, throughput, jitter, latency and bit error rate.Bandwidth and Throughput – Key TermsBandwidth is a popular term used in the context of both networking and communications. In networking, the bandwidth is specified using bps (bits per second), kbps (kilobits per second), Mbps (Megabits per second) and so on.In communications, bandwidth is measured in the unit kHz (kilo Hertz), MHz (Mega Hertz), GHz (Giga Hertz) and so ...
Read MoreExplain the ASP.NET Core support for multiple environments for development and production
Running an application in production for live customers is very different from running it when you are developing it on your local machine. In production, your application is hosted on a server which has very different configurations and specifications than your computer. Various services that your application talks to, such as databases or external APIs change for production.By letting the application know which environment it’s running, you can vary the application’s behavior. ASP.NET Core makes it easy to manage various environments effortlessly. You can configure different configuration settings for different environments, and tweak them without having to recompile the application. ...
Read MoreHow to schedule background tasks (jobs) in ASP.NET Core?
Background tasks, also called as jobs, are essentially services that aren’t meant to execute during a normal flow of the application, such as sending email confirmations or periodically cleaning up the database to purge the inactive accounts. These jobs are not meant to interact with the customers or process user input. Rather, they run in the background, handling items from a queue or executing a long-running process.A primary advantage of performing these tasks in a background job or service, you can keep the application responsive. For example, when a user signs up, instead of sending them an email in the ...
Read MoreWhat is SignalR and how to use it?
In typical web applications, the communication flow is one-way, i.e. from client to the server. The client initiates a request to the server, the server performs some task, and sends the response to the client.SignalR is an open-source project that enables real-time, bi-directional web communication from server to clients. Using SignalR, you can write server-side code that can communicate with the clients instantly.SignalR simplifies the process of adding real-time web functionality to web applications, where the server code pushes content to connected clients as soon as it becomes available. This frees the clients from repeatedly polling the server, and having ...
Read MoreWhat is Kestrel and how does it differ from IIS? (ASP.NET)
Kestrel is a lightweight, cross-platform, and open-source web server for ASP.NET Core. It is included and enabled by default in ASP.NET Core. Kestrel is supported on all platforms and versions supported by .NET Core.In the Program class, the ConfigureWebHostDefaults() method configures Kestrel as the web server for the ASP.NET Core application.public class Program{ public static void Main(string[] args){ CreateHostBuilder(args).Build().Run(); } public static IHostBuilder CreateHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder =>{ webBuilder.UseStartup(); }); }Though Kestrel can serve an ...
Read MoreExplain the purpose of the Startup class in ASP.NET Core
The Startup class configures your application's services and defines the middleware pipeline.Generally speaking, the Program class is where you configure your application's infrastructure, such as the HTTP server, integration with IIS, and configuration sources. In contrast, the Startup class defines which components and features your application uses and the middleware pipeline for your app.Startup.csHere is a sample Startup.cs file in a standard ASP.NET Core application.using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using Microsoft.AspNetCore.Builder; using Microsoft.AspNetCore.Hosting; using Microsoft.AspNetCore.HttpsPolicy; using Microsoft.Extensions.Configuration; using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Hosting; namespace TutorialsPoint{ public class Startup{ public Startup(IConfiguration configuration){ ...
Read MoreExplain the purpose of the Program class in ASP.NET Core
An ASP.NET Core application starts similarly to a .NET Console application. It uses the Main() method defined in the Program.cs file as the entry point of the application. The framework calls the Main() method whenever you start the web application.In the ASP.NET Core application, the Main() method builds and runs the Host. The Host object is one of the essential parts of the ASP.NET Core application. It contains the configuration and the webserver (Kestrel) that your application uses.Program.csHere is a sample Program.cs file in a standard ASP.NET Core application.using System; using System.Collections.Generic; using System.Linq; using System.Threading.Tasks; using Microsoft.AspNetCore.Hosting; using Microsoft.Extensions.Configuration; ...
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