Question

Compare and contrast centralized verses distributed networking and give examples when each would be the optimal setup. Also be sure to cover front end verses back end software.

Answer 1

Answer:

centralized networking:

A type of network where all users connect to a central server, which is the acting agent for all communications. This server would store both the communications and the user account information. Most public instant messaging platforms use a centralized network

Centralized computing is a type of computing architecture where all or most of the processing/computing is performed on a central server. Centralized computing enables the deployment of all of a central server's computing resources, administration and management. The central server, in turn, is responsible for delivering application logic, processing and providing computing resources (both basic and complex) to the attached client machines.

distributed networking:

A distributed network is a type of computer network that is spread over different networks. This provides a single data communication network, which can be managed jointly or separately by each network. Besides shared communication within the network, a distributed network often also distributes processing.

Distributed networks are part of distributed computing architecture, in which enterprise IT infrastructure resources are divided over a number of networks, processors and intermediary devices. A distributed network is powered by network management software, which manages and monitors data routing, combining and allocating network bandwidth, access control and other core networking processes.

Distributed networks and processing work together to deliver specialized applications to different remote users. This means that an application may be hosted and executed from a single machine but accessed by many others. A client/server computing architecture is an example of a distributed network where the server is the producer of a resource and many interconnected remote users are the consumers who access the application from different networks

Differences:

->In centralized processing, one or more terminals are connected to a single processor. Note that terminal is the combination of mouse, keyboard, and screen. In-library there is one processor attached to different terminals and library users can search any book from the terminal (mouse, keyboard, and screen). In centralized processing all the terminals are controlled by a single processor (CPU) and any command can be fulfilled by a single processor and this type of network is called centralized network.

->different CPU are connected to the network and are controlled by single CPU. For example in air reservation system there exists different terminals and processing is done from many locations and all the computers are controlled by the single main processor. This type of network is called distributed network

Centralized: all calculations are done on one particular computer (system). Example: you have a dedicated server for calculating data.

Distributed: the calculation is distributed to multiple computers. Example: when you have a large amount of data then you can divide it and send each part to particular computers which will make the calculations for their part.

Front end:

The front-end is everything involved with what the user sees, including design and some languages like HTML and CSS. Most of the web courses created at Digitatutr will be for the front-end and focused on design, but there are already a bunch of front-end specific courses available at Pluralsight as well. There are a lot of different jobs associated with the front-end. Keep in mind that a lot of these titles are subjective, and while front-end developer may mean something at one company, it can mean something completely different at another company. A common front-end job title is "web designer." A web designer, you guessed it, designs websites. The job title of web designer is pretty broad, though. A web designer could just be someone who designs the sites in a program like Photoshop or Fireworks and will never touch the code. But in another location, a web designer could do all the design comps in Photoshop, and then be responsible for creating all the HTML and CSS (and sometimes even JavaScript) to go along with it. A User Interface (UI) Designer is basically a visual designer and is generally focused on design. They're not usually involved in the implementation of the design, but they might know light HTML and CSS so they can communicate their ideas more effectively to the developers. User Experience (UX) designers work in the front-end and study and researches how people use the sites and make changes through a lot of testing. A front-end designer or developer can create a site without any back-end development. The sites they would create without a web developer, or using the back-end, is a static site. A static site is something like a site for a restaurant or hair salon. It doesn't require any information to be stored in a database. The pages will almost always stay the same, unless it's time for a redesign. A front-end developer may be required to have a grasp on testing, as well as be well versed in HTML, CSS and JavaScript. This person may or may not have experience with creating the design in a design program. A different version of this title is front-end engineer. Specific front-end languages like "JavaScript developer" are also considered front-end developers

Backend:

The back-end, or the "server-side", is basically how the site works, updates and changes. This refers to everything the user can't see in the browser, like databases and servers. Usually people who work on the back-end are called programmers or developers. Back-end developers are mostly worried about things like security, structure and content management. They usually know and can use languages like HTML and CSS, but that's definitely not their focus. Back-end developers, or at least back-end development, is required to create a dynamic site. A dynamic site is a site that's constantly changing and updated in real-time. Most sites are dynamic sites, as opposed to static sites. Facebook, Google Maps and this blog are all considered dynamic sites. Blogs are dynamic sites, since their content is constantly changing and updating. A dynamic site requires a database to work properly. All information, like user profiles or images they've uploaded, or blog posts, are stored in the database. Web developers work with programming languages like PHP or .Net, since they need to work with something the database understands. The code they write communicates with the server and then tells the browser what to use from the database.