Advantages Of Web Applications Computer Science Essay

Advantages Of sack up Applications Computer Science Essay mesh action development is the growth and practice of developing meshwork maskings. Web operations atomic number 18 business strategies and policies utilize on the Web through the exercise of User, Business and Data services. These tools argon where the future lies.Web establish applications cave in evolved con aspectrably over the correspond years and alongside improvements in protection and knowledge in that respect argon plenty of scenarios where traditional package based applications and arrangements might be compound by transferring them to a weave based application.The pursuit argon a few of the core benefits of blade based applications.Cross political program compatibility.bulk of the web based applications ar much more exceptional harmonious across curriculums than traditional inst e very(prenominal)ed software. Norm al stary the minimum necessity should be a web browser of which there are plen ty. (Internet Explorer, Firefox, Netscape to line but a few)These web browsers are dotable for a multitude of working in operation(p) governing bodys and so whether you engross Windows, Linux or mackintosh OS you goat miss the web applicationMore manageableThe web based systems right need to be inst each(prenominal)ed on the boniface allocating minimal requirements on the check substance ab drug user workstation. This suffices maintaining and notifying the arrangement far simpler as normally it batch all be completed on the horde. Each client updates digest be utilize via the web server with quieten.Highly deployableBecause of the manageability and cross platform support, employing web applications to the end user is much easier. They are additionally perfect where bandwidth is limited and the system and info is remote to the user. At their approximately deployable you simply need to dispatch the user to a website address to log in to and provide them with inter net access.This has huge implications permitting you to widen admission to your systems, update procedures and parent connections by outstripowing more of your clients, suppliers and third parties with admission to your systems.Secure live infoIn larger and more complex systems the selective culture is stored and shifted slightly mingled systems and data sources. In web based systems these systems /procedures can frequently be consolidated cutting the demand to move data around.Web based applications additionally furnish an added layer of protection by removing the demand for the user to have admission to the data and back end servers.Reduced costWeb based applications can lower prices dramatically due to decreased support and maintenance, lower the requirements on the end user system and change the architecture.Reduce company prices less time is spent conversing to clients over the retrieve remove printed materials permit users to update/modify their own details.With more modify of your company procedures as a consequence of your web based application supplementary savings can frequently be found.Zero installations all computing devices have a browserCentralised data more in effect(p) easy to backup.Quick and easy to update.Reach anyone, anywhere in the world.Availablility 24 hours a day, 7 days a week.Low spec PCs or smart phones can be apply.Training- Online can be completed at users own time and pace.Direct access to latest nurture for Employees where it is located. everlastingly up-to-date.Web-based applications are tricky to grasp and maintain. The users of Web-based applications change quite dynamically. Users can over around the nut, managing to an inherent assumption that the postulate has to be highly available. An extremely obtainable request has to additionally be exceedingly reliable and scalable. alone good Web-based applications benefit from countless features. In this article, I will disceptation some of the aspects and the key features that you have to address in a Web application Scalability Availability Maintainability ReliabilityKey features for a Web applicationEach enterp compound application must have the supra-mentioned abilities, as well as affordability, reliability, upgradability, supportability, profitability and marketability.ScalabilityScalability of an application has two autonomous aspects these are scale up and scale out. Scaling up involves enhancing the hardware or optimizing the software to safeguard a solitary server machine that can support extra users. Example, if a machine upheld 100 users before a scale up, thusly, afterward a scale up exercise, it could rise to cxxv users.Scale out is when extra servers that present the same functions can be added, without disrupting the software, to rise the number of users upheld by the application. The users could rise from 100 to 175 accompanyingly adding one more set of server machines. The number of users should not branched be cause of the overhead of contact in the midst of the servers allocating the load. This additionally shows that the software can be able to seamlessly allocate the angle of a virtuoso server between more than one server.AvailabilityHigh availability is generally utilise synonymously with availability. A highly available application is the one thats up and running most periods in a year, hence elevated say-so is mea for sured in words of downtime across the year. This downtime additionally includes projected downtime of the request for maintenance and upgrading.MaintainabilityAn application is believed to be maintainable if it can cater to most of the necessitate of the users above its lifetime. If an application can raise the number of users as demanded, enhance the features that users demand, and add new features to the request as demanded, next the application is maintainable.ReliabilityThe downtime of an application due to bugs in the software is usually the undependability factor. It is extremely snappy for an application to have a elevated reliability factor to safeguard that it is additionally exceedingly available. Availability is decreased alongside each kind of downtime, encompassing downtime for software bugs.Task 2 apply two languages in each case to critically compare the dissimilar types of server-side and client-side scripting languageA scripting language or script language is a programming language that supports the writing of scripts, programs written for a software surround that automate the execution of tasks which could alternatively be executed one-by-one by a human operator. http//en.wikipedia.org/wiki/Scripting_languageA client-side script is a progam that could convoy an hypertext mark-up language memorandum or be embedded directly in it. The program executes on the clients machine after the document loads, or at a atomic supplementary period such as after a touch base is activated. HTMLs support for scripts is autonomous of the scripting language.Scripts proposal authors a way to spread HTML documents in highly active and interactive ways. E.g Scripts could be assessed as a document loads to adjust the contents of the document dynamically. Scripts could convoy a form to do input signal as it is entered. Designers could vibrantly fill out portions of a form established on the benefits of supplementary fields. They could additionally safeguard that input data conforms to predetermined scopes of benefits, that fields are reciprocally consistent, etc. Scripts could be activated by events that alter the document, such as loading, unloading, agent focus, pussyfoot movement, etc. Scripts could be related to form controls (e.g., buttons) to produce graphical user interface elements.Server side scripting languages in a web hosting taradiddleServer side scripting language makes it probable to craft more march on web sites. This page encompasses descriptions of the most public scripting languages obtainable in web hosting accounts.For the qualification of advanced dynamic websites, you require some server side scripting. Server side scripts are programs that are provided on the server, and can be utilize in countless ways. Template based web sites and obtain carts are a few examples. The languages utilized for these tasks are normal software cast languages alongside distinct libraries/packages for server side scripting.Not all web hosting reports support all public scripting languages, so this is a vital factor in your find for the flawless web host. The following are a few of the most public software function languages utilized for server side scripting.ASP/ASP.netASP, or Alert Server Pages, is a technology industrialized by Microsoft for making more advanced web pages. The most crude language for software fig ASP is VBScript. It is obtainable in most web hosting accounts on Microsoft servers. in that location is additionally a edition for Unix servers shouted Chillisoft ASP, but it is not as stable as real ASP. there are plenty of online ASP resources too. ASP.NET 4.Matthew MacDonald (5 family 2010)ASP.net is the subsequent creation ASP technology that permits you to use any .net-enabled language to computer programme a site. The two most public languages for .net web software initiation is VB.net and C. Both of these languages are good choices for two desktop and web applications. VB.net is perhaps easier to use and give away, and C is extra utilized for enterprise applicationsPHPPHP, or PHP Hypertext Preprocessor is an open source language .PHP has obtained large popularity the last few years. It is very easy to learn and there are countless readymade scripts available. Nearly all(prenominal) single inexpensive web hosting package includes PHP. Compared to other languages It is easy to learn for a programming language with countless books and web sources dedicated to it.PHP MySQL In Easy Steps by Mike McGrath (15 Aug 2012)The main choice for s erver side scripting on Unix/Linux periods is PHP. Its easy to learn and quick to program in. umber (JSP/Servlets) is the favored choice for larger projects/enterprises. Those who are arranging to become adroit Windows programmers cant go wrong alongside ASP.net, alongside language choices for both beginners and extra experienced programmers. ColdFusion, Perl and Python are additionally good software digit languages alongside their exceptional strengths.The languages are just instruments, and most software number methods can be utilized alongside most software design languages. Programmers should select one language and stick to it in the beginning. The use of various languages can be mystifying for beginners. For experienced programmers, new scripting languages are more easier to learn.PHP vs ASP.net ComparisonScalability and Ease of MaintenanceScalability and ease of maintenance have nil to do if a programmer selects PHP or ASP.net platform. Web application scalability and e ase of maintenance chiefly depend on the Programmers experience Using the best programming design practices Using a solid programming design framework Following software design guidelines and standards.Performance and SpeedThere has been a lot of debate concerning this subject and most of the debates have been sloped and have been tailored to advance one of the programming languages instead of notifying the audience.There are so many countless supplementary factors to ponder when it comes to figuring web application speed, so the speed of each software design language ought to not have any noticeable effect on the speed and presentation of most of the websites nowadays.When it comes to the main and common database servers, MySQL (now owned by Oracle), PostgreSQL, MSSQL and Oracle are all clashing for speed and makeance. new features are seen and better performance by all database servers in every single edition enhance so I will say that the above database servers will all have a outstanding performance if the database programmers use optimized and useful SQL queries and if demanded, use the elevated features such as caching.MySQL is utilized by Google, Facebook, YouTube, Yahoo and very recently on FIFA world Cup that has consented a huge amount of viewers worldwide. This shows the capability of the MySQL database serverOther items that can have a result on presentation but have nothing to do alongside the software design language is selected are Ability and good deal of programmer to optimize the code Ability and vision of programmer to accurately relieve properly and optimized SQL queries. a few functions could want longer to present in the ASP.net platform and less time in the PHP platform or the other way roundCostPHP, MySQL server, Apache server, and Linux OS are all free and upgrades are additionally free. There is no additional licensing price for possessing one more hot standby server as a backup, or demanding to run several servers for burden ra pprochement or server clustering.ASP.net is free if you buy Windows OS. There is a umbrella licensing price for a Microsoft Windows Server, Microsoft SQL Server and upcoming upgradesThe licensing prices for Microsoft can considerably rise if the site becomes porpular and there is a demand to run the site on several servers or needs server features such as burden balancing, server clustering or hot standby.Support and ResourcesSince LAMP is open source, there is a large number of dedicated and approachable developers around the globe who unceasingly make improvements and updates, and provide added support for the platform. Additionally, there are extra support resources and developers obtainable for PHP and LAMP Platforms.ASP.net relies on an available number of developers at Microsoft for making improvements and updates. There are less support contributors available to solve ASP.net challenges. acquire PHP, MySQL, JavaScript, and CSS A Step-by-Step Guide to Creating Dynamic Website s by Robin Nixon (3 Sep 2012)Time to DeployIt takes a larger number (more lines) of code to last difficult features and functionality alongside ASP.net contrasted to PHP, adding extra time and cost to the development process. fit to Programming PHP PaperbackKevin Tatroe (Author), Peter MacIntyre (Author), PHP is interpreted at the server, so after ever-changing functionality, no supplementary steps are needed to see the changes. ASP.net needs to be compiled every single time the code is modified. The development process is extra time-consuming after employing ASP.net as compared to PHP.Platform IndependentPHP is platform independent that can run on any platform (Linux, Unix, Mac OS X, Windows)In contrast ASP.net is exclusively built to run only on the Windows platform.Task 3Discuss three web bail concerns and make recommendations for security improvementsPrivacy A term frequently used to delineate an individuals anonymity and how safe they feelin a location. when you are referin g to screen on the Internet, this usually means to what data is public alongside the visiting site, how that data is utilized, who that data is shared with, or if that data is used to track users on the website. Answers to these inquiries are usually discovered on the firm or website privacy strategyExamples of privacy invasionIdentity stealingIdentity theftis the act of a person obtaining information illegally about someone else. Often the thief will try finding such information as first name, surname, address, date of birth, social security number, passwords, phone numbers, email, family information, impute cod numbers, other credit information, etc. The thief can then use this information to apply access to bank accounts, e-mail, cell phones, come in themselves as you, or sells your information.There are various ways of preventing identity operator theft e.gUsing secure pages when on the internet. This are usually indicated with a lockDo not store debit /credit card detai ls onlineHaving active and up-to-datespywareprotection programHaving antivirus protectionknowingness of fake e-mails andphishinge-mailsmaking sure computer is secure (passwords)HackingThis is a term associated with any change not approved by the manufacturer or developer that makes the device do something it was not initially intended to do. Hackers usually use a software program downloaded to help a user perform a hack on their computer or other computer or device. Some software that whitethorn claim to do one thing may do another. For example, software that may promise to acquit you access to another individuals computer may allow other hackers to get access to your information (akaTrojan Horses).Listing of programs that may indicate a hacker has been on the computer.BackdoorsandTrojansare by far the most common programs to be installed on the computer after it has been hacked. These programs allow the hacker to gain access to the computer.Spyware, rogue antivirus programs, andma lwarecan be an indication of a hacker.The following are ways of protecting your computer systemVerify data is encryptedUse safe passwordsBe cautious when logging from different locations modify internet browser pluginsSecure saved passwordsBe aware of those around youIII) Destruction this is a very important reason for securing of data. System can be damaged and thus losing of data. Viruses can cause a system to function slowly and in time crash. This will affect other users.Malicious file executionUploaded files or other data feeds may not be what they seem. Never allow user-supplied input to be used in any file name or path (e.g. URLs or file system references). Uploaded files may also contain a vindictive payload so should not be stored in web reachable locations.According to Computer Securityby Dieter Gollmann(Mar 8, 2011)When sending confidential information such as usernames, passwords or financial/personal details make sure by verifying that it is encrypted. Use of URL lik e HTTPS acquaint you with phishing scams and techniques, which are used to con you into divulging account information. Finally make sure to store passwords and login information in a secure area. Never write login information on a sticky note or in a text file that is not encrypted.