scholarly journals Experiential Learning Of Networking Technologies: Evolution Of Socket Programming – Part I

2019 ◽  
Author(s):  
Ram P Rustagi ◽  
Viraj Kumar
Keyword(s):  
High Performance ◽  
Web Server ◽  
Transport Layer ◽  
The Internet ◽  
Communication Performance ◽  
Best Effort ◽  
Connection Management ◽  
Server Side ◽  
Client Side ◽  
Tcp Connections

In the 21st century, the internet has become essential part of everyday tasks including banking, interacting with government services, education, entertainment, text/voice/video communication, etc. Individuals access the internet using client-side applications such as a browser or an app on their mobile phone or laptop/desktop. This client-side application communicates with a server-side application, typically running on a web server, which in turn may interact with other business applications. The underlying protocol is typically HTTP [1] running on top of the TCP/IP protocol [2][3]. A typical web server supports a large number (hundreds or thousands) of concurrent TCP connections. The most commonly deployed web servers in use today are Apache server [4], Nginx [5], or Microsoft Internet Information Server (IIS)[6]. Nginx is mostly used on Linux and IIS runs only on Windows OS. In contrast, Apache web server (which is almost as old as the web itself) is supported on all platforms (Linux, Windows, MacOS, etc.). In its initial release in 1995 (version 1.3), Apache server could serve only a few concurrent clients, but its current release (2.4.41) can support a huge number of concurrent clients. In this article (as well as Part II that will follow), we will present a simplified view of this evolution that nevertheless explains how current web manage such high levels of concurrency. To do so, we will delve into socket programming, which is at the heart of managing TCP connections, and we will examine the key role that it plays in delivering high performance. We have studied both transport layers protocol i.e., TCP [2] and UDP [7], in detail in the last few articles, and we have developed a basic understanding of the working of the transport layer. This is a communication-enabling layer used by applications to exchange application-level data. Simple working of applications using TCP (providing reliable delivery) and UDP (providing best effort delivery) socket programming are provided in [8]. In this article, however, we will discuss increasingly complex levels of socket programming, from simple socket connections to complex connection management that are necessary to attain high TCP performance. We will focus on TCP Socket programming only. UDP socket programming is simply a best effort delivery and socket implementation support does not impact the application communication performance.

The Framework Design of E-Box Multimedia System

2013 ◽  
Vol 739 ◽  
pp. 628-631
Author(s):  
Xiao Meng Chen ◽  
Wei Chang Feng
Keyword(s):  
Remote Control ◽  
Multimedia System ◽  
The Internet ◽  
Tv Viewing ◽  
Server Side ◽  
Framework Design ◽  
E Box ◽  
Video And Audio ◽  
The Rich ◽  
Client Side

E-Box multimedia system is developed for the rich audio and video resource on the Internet and on its server side, it can automatically search and integration of network video and audio resources, and send to the client side for the user in real-time broadcast TV viewing, full use of remote control operation, Simply its a very easy to use multimedia system. This article introduces its infrastructure, main technical ideas and you can also see some details about server side and client side.

A Home Multimedia Control Centers of Improved Design

2011 ◽  
Vol 338 ◽  
pp. 796-799
Author(s):  
Wei Chang Feng
Keyword(s):  
Remote Control ◽  
Real Time ◽  
Multimedia System ◽  
The Internet ◽  
Tv Viewing ◽  
Server Side ◽  
Video And Audio ◽  
The Rich ◽  
Improved Design ◽  
Client Side

E-Yuan multimedia system is developed for the rich audio and video resource on the Internet and on its server side, it can automatically search and integration of network video and audio resources, and send to the client side for the user in real-time broadcast TV viewing, full use of remote control operation, Simply it’s a very easy to use multimedia system. This article introduces its infrastructure, main technical ideas and you can also see some details about server side and client side. At the same time, the improvement on how to collect and integrate video resources is comprehensively elaborated.

TLS, SSL, and SET

2008 ◽  
pp. 300-333
Author(s):  
Manuel Mogollon
Keyword(s):  
Credit Card ◽  
Web Server ◽  
Point Of View ◽  
Transport Layer ◽  
The Internet ◽  
Secure Socket Layer ◽  
End User ◽  
Credit Card Number ◽  
Transport Layer Security ◽  
Commercial Transaction

In an Internet commercial transaction, the secure Web server and the buyer’s computer authenticate each other and encipher the data transmitted using transport layer security (TLS) or secure socket layer (SSL) protocols. When a purchase is made online using a credit card, does the customer’s bank need to know what was purchased? Not really. Does the seller need to know the customer’s credit card number? Actually, the answer is no. The responses to these questions were the main premises of the secure electronic transaction (SET). In the late 1990’s, SET was approved as the credit card standard, but it failed to be accepted because of its cost and the problems regarding distribution of end-user certificates. However, SET is explained in this chapter as an ideal protocol, from the point of view of certificates, digital signatures, and cryptography for securing credit card transactions over the Internet.

Technical Considerations for Building a Landslide Tracker Mobile App

2021 ◽  
Author(s):  
Ramesh Guntha ◽  
Maneesha Vinodini Ramesh
Keyword(s):  
High Performance ◽  
Monsoon Season ◽  
Performance Testing ◽  
Mobile App ◽  
Mobile Databases ◽  
Synchronization Mechanism ◽  
Server Side ◽  
Repeated Calls ◽  
The World ◽  
Client Side

<p>Substantially complete landslide inventories aid the accurate landslide modelling of a region’s susceptibility and landslide forecasting. Recording of landslides soon after they have occurred is important as their presence can be quickly erased (e.g., the landslide removed by people or through erosion/vegetation). In this paper, we present the technical software considerations that went into building a Landslide Tracker app to aid in the collection of landslide information by non-technical local citizens, trained volunteers, and experts to create more complete inventories on a real-time basis through the model of crowdsourcing. The tracked landslide information is available for anyone across the world to view. This app is available on Google Play Store for free, and at http://landslides.amrita.edu, with software conceived and developed by Amrita University in the context of the UK NERC/FCDO funded LANDSLIP research project (http://www.landslip.org/).</p><p>The three technical themes we discuss in this paper are the following: (i) security, (ii) performance, and (iii) network resilience. (i) Security considerations include authentication, authorization, and client/server-side enforcement. Authentication allows only the registered users to record and view the landslides, whereas authorization protects the data from illegal access. For example, landslides created by one user are not editable by others, and no user should be able to delete landslides. This validation is enforced at the client-side (mobile and web apps) and also at the server-side software to prevent unintentional and intentional illegal access. (ii) Performance considerations include designing high-performance data structures, mobile databases, client-side caching, server-side caching, cache synchronization, and push-notifications. The database is designed to ensure the best performance without sacrificing data integrity. Then the read-heavy data is cached in memory to get this data with very low latency. Similarly, the data, once fetched, is cached in memory on the app so that it can be re-used without making repeated calls to the server every time when the user visits a screen.  The data persists in the mobile database so the app can load faster while reopening. A cache-synchronization mechanism is implemented to prevent the caches' data from becoming stale as new data comes into the database. The synchronization mechanism consists of push-notifications and incremental data pulls. (iii) Network resiliency considerations are achieved with the help of local storage on the app. This allows recording the landslides even when there is no internet connection. The app automatically pushes the updates to the server as soon as the connectivity resumes. We have observed over 300% reduction in time taken to load 2000 landslides, between the no-cache mode to cache mode during the performance testing. </p><p>The Landslide tracker app was released during the 2020 monsoon season and more than 250 landslides were recorded through the app across India and the world.</p>

Database Dynamic Programming Based on B/S

2013 ◽  
Vol 310 ◽  
pp. 601-604
Author(s):  
Lu He ◽  
Yan Mei Zhang
Keyword(s):  
Data Exchange ◽  
The Internet ◽  
Main Stream ◽  
Software Developer ◽  
Server Side ◽  
Internet Explorer ◽  
Three Layer Architecture ◽  
Client Side ◽  
Requirement Changes ◽  
Core Part

Short for Browser/Server, B/S is designed to centralize the core part of system functions on the server side, when users just need to install a browser on the client side, such as Internet Explorer, Firefox. Thus, the browser can be used for data exchange through the Web Server anywhere, as long as the computer accesses to the Internet. As a result, there is no doubt that the development of B/S structure system has become main-stream as the Internet has developed rapidly today [1]. As we all know, it is increasingly challenging that customers are having more and more requirements of details and depths, which demands more of a software developer. Now we are exploring a new method of programming by configuring database in order to improve the traditional three layer architecture (3-tier application). It would be quicker and more convenient for developers to modify functions according to the requirement changes from customers, largely reducing the workload either in development or maintenance.

The Framework Design of E-Yuan Multimedia System

2011 ◽  
Vol 148-149 ◽  
pp. 7-10
Author(s):  
Wei Chang Feng ◽  
Xiao Meng Chen
Keyword(s):  
Remote Control ◽  
Real Time ◽  
Multimedia System ◽  
The Internet ◽  
Tv Viewing ◽  
Server Side ◽  
Framework Design ◽  
Video And Audio ◽  
The Rich ◽  
Client Side

E-Yuan multimedia system is developed for the rich audio and video resource on the Internet and on its server side, it can automatically search and integration of network video and audio resources, and send to the client side for the user in real-time broadcast TV viewing, full use of remote control operation, Simply it’s a very easy to use multimedia system. This article introduces its infrastructure, main technical ideas and you can also see some details about server side and client side.

Optimization Project on Collecting and Integrating Video Resources

2013 ◽  
Vol 427-429 ◽  
pp. 2462-2465
Author(s):  
Wei Chang Feng
Keyword(s):  
Remote Control ◽  
Real Time ◽  
Multimedia System ◽  
The Internet ◽  
Tv Viewing ◽  
Server Side ◽  
E Box ◽  
Video And Audio ◽  
The Rich ◽  
Client Side

E-Box multimedia system is developed for the rich audio and video resource on the Internet and on its server side, it can automatically search and integration of network video and audio resources, and send to the client side for the user in real-time broadcast TV viewing, full use of remote control operation, Simply its a very easy to use multimedia system. This article introduces its infrastructure, main technical ideas and you can also see some details about server side and client side. At the same time, the improvement on how to collect and integrate video resources is comprehensively elaborated.

scholarly journals Broadening access to supercomputers for CMIP6 and CORDEX multimodel comparisons

2020 ◽  
Author(s):  
Stephan Kindermann ◽  
Maria Moreno
Keyword(s):  
High Performance ◽  
Data Science ◽  
High Volume ◽  
System Modelling ◽  
Earth System ◽  
Volume Data ◽  
Server Side ◽  
Network Bandwidth ◽  
Data Collections ◽  
Client Side

<p>We will present a new service designed to assist the users of model data in running their analyses in world-class supercomputers. The increase of data volumes and model complexities can be challenging for data users with limited access to high performance computers or low network bandwidth. To avoid heavy data transfers, strong memory requirements, and slow sequential processing, the data science community is rapidly moving from classical client-side to new server-side frameworks. Three simple steps enable server-side users to compute in parallel and near the data: (1) discover the data you are interested in, (2) perform your analyses and visualizations in the supercomputer, and (3) download the outcome. A server-side service is especially beneficial for exploiting the high-volume data collections produced in the framework of internationally coordinated model intercomparison projects like CMIP5/6 and CORDEX and disseminated via the  Earth System Grid Federation (ESGF) infrastructure. To facilitate the adoption of server-side capabilities by the ESGF users, the infrastructure project of the European Network for Earth System Modelling (IS-ENES3) is now opening its high performance resources and data pools at the CMCC (Italy), JASMIN (UK), IPSL (France), and DKRZ (Germany) supercomputing centers. The data pools allow access to results from several models on the same site and the data and resources are locally maintained by the hosts. Besides, our server-side framework not only speeds the workload but also reduces the errors in file format conversions and standardizations and software dependencies and upgrade. The service is founded by the EU Commission and it is free of charge. Find more information here: https://portal.enes.org/data/data-metadata-service/analysis-platforms. Demos and tutorials have been created by a dedicated user support team. We will present several use cases showing how easy and flexible it is to use our analysis platforms for multimodel comparisons of CMIP5/6 and CORDEX data. </p>

scholarly journals A Framework for Web Application Vulnerability Detection

2020 ◽  
Vol 9 (3) ◽  
pp. 543-549
Keyword(s):  
Web Application ◽  
Human Life ◽  
Dynamic Change ◽  
The Internet ◽  
Detection Mechanism ◽  
Server Side ◽  
Digital World ◽  
Mechanism Research ◽  
User Friendly ◽  
Client Side

Hardly a facet of human life is not influenced by the Internet due to the continuous proliferation in the Internet facilities, usage, speed, user friendly browsing, global access, etc. At flip side, hackers are also attacking this digital world with new tactics and techniques through exploiting the web application vulnerabilities. The analysis of these vulnerabilities is of paramount importance in direction to secure social digital world. It can be carried out in two ways. First, manual analysis which is error prone due to the human nature of forgiveness, dynamic change in technology and fraudulence attack techniques. Second, through the existing web application vulnerability scanners that sometime may suffer from generating false alarm rate. Hence, there is a need to develop a framework that can detect different levels of vulnerabilities, ranging from client side vulnerabilities, communication side vulnerabilities to server side vulnerabilities. This paper has carried out the literature survey in direction of identifying the new attack vectors, vulnerabilities, detection mechanism, research gaps and new working areas in same field. Continuous improvement in framework is easy. Hence, a framework is proposed to overcome the identified research gap

scholarly journals Design of Online-Based Tourism Ticket Purchase System

2021 ◽  
Vol 3 (2) ◽  
pp. 59-71
Author(s):  
Salsabila Safira Azalea
Keyword(s):  
Information System ◽  
Programming Language ◽  
Technology Development ◽  
The Internet ◽  
Server Side ◽  
Tourism Promotion ◽  
Client Side ◽  
Ticket Purchase ◽  
The Military ◽  
The Web

In this day and age, technology development is very rapid, especially the development of the internet which greatly facilitates human work in various fields such as the military, offices, factories, medical, and entertainment. Entertainment is something that is very much needed for some people because of the density of activities, for many recreational places have started to use all their activities through the web, one of which is in terms of promotions and ticket purchases. Here the author makes a system where ticket purchases can be made via the web. Starting from designing the existing displays by coding with the programming language that has been determined, for client-side namely HTML, CSS (Bootstrap), and JavaScript as well as server-side using PHP and MySQL. After that, it is implemented using a computer. This writing aims to build a ticket purchase information system and tourism promotion that is simple and easy to use.

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