Difference between Hub, Switch and Router

In this article, we are going to see the difference between a hub, switch, and router. All these 3 devices are similar but there is a difference between the way in which they handle the data. So let's first talk about a hub.

Hub:-

The purpose of the hub is to connect all of your network devices together on an internal network. It is a device that has multiple ports that accept Ethernet connections from network devices. Now a hub is considered not to be intelligent. Because it does not filter any more data or has any intelligence as to where the data is supposed to be sent that is because the only thing hub knows is when a device is connected to one of its ports. So when a data packet arrives at one of the ports it is copied to all of the other ports. So all the devices on that hub see that data packet. So again a data packet comes into one port then the hub will just copy the data to all other ports to which devices are connected.

So even if one computer on the network only wants to communicate with another computer then the other computers will still receive the data, even though the data was not intended for them. So when this situation occurs then it not only creates security concerns but also creates unnecessary traffic on the network which wastes bandwidth.

Switch:-

It is very similar to the hub. It is also a device that has multiple ports that accepts Ethernet connections from networks devices. But unlike a hub, a switch is intelligent. A Switch can actually learn the physical addresses of the devices that do not really connected to it and it stores these physical addresses called Mac addresses in its switch table. So when a data packet is sent to a switch it is only directed to the intended destination port, unlike a hub where hub broadcasts the data to every port.

So as an example assume that there is a network and one computer on a network wanted to communicate to another computer then the data packet arrives at a switch and then the switch will look at its table containing Mac addresses and matching ports and deliver the data packet to the correct port. And then the data packet would go to only that computer so that is a major difference between a hub and a switch.

So as a result switches are far more preferred over hubs because they reduce any unnecessary traffic on the network.

As a review, we can say that a hub will only detect that device which is physically connected to it and a switch can detect specific devices that are connected to it because it keeps the record of the Mac addresses of those devices.

Hub and switches are used to exchange data with a local area network for ex: in your home network or in your business. They are not used to exchange data outside their own network. Such as route on the internet because to exchange data such as route outside their own network to another, a device needs to be able to read IP addresses and hub and switches do not read IP addresses. So that is where a router comes into the picture.

Router : -

A router does exactly what its name implies. A router is a device that routes data from one network to another based on their IP address. When a data packet is received from a router the router inspects the data's IP address and determines if the packet was meant for his own network or if it is meant for another network. If the router determines the data packet is meant for its own network then it receives it.

But if it is not meant for its own network then it sends it off to another network. So a router is a gateway of a network. For ex : assume that you have a private network with its router and will refer to this as XYZ network. Also, consider that there are different data packets which represent different IP addresses and they are going to be entering in the XYZ network from the internet. Now the router will be going to accept the data packet with XYZ. Because they are the only ones that are intended for this network and all of the other data packets with different names will be rejected by this router because they were not intended for this network because their IP addresses were not meant for this network.

You can consider an expanded view of the routers over the internet. Suppose there are 5 routers indicated by different names and each network has their own router along with hubs or switches along with the computers. So you can imagine that each network is exchanging information in their own network. Their data will not go out on the internet.

So the computer sends their data and it goes to the network's router and once the data packet reaches its router, the router will lookout for an IP address of the data packet and then forward the data out on the internet to the next router and then makes its way to the PQR network router and then to the intended destination computer.

So, in a nutshell, this is how routers work. So the conclusion is: Hubs and switches are used to connect networks.

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Cheap Web Hosting Company in Sri Lanka
Difference Between Web Designer and Web Developer

7 Best Web Hosting company for Indian Websites
Differences between SQL and NoSQL ExplainedConfused Between Free Vs. Paid Web Hosting ? Let Me Us YouFree Vs. Paid Web Hosting
Websites Vs. Web Applications

What is SEO and its types? Web Hosting Your Website ? Read it Before You Start Your Online Business

Difference Between Web Designer and Web Developer

The reason for writing this article is that a lot of people are still confused between a Web Designer and a Web Developer. They don't know the difference between a Web Designer and a Web Developer i.e. What does a Web Designer do? or What does a Web Developer do?

Peoples often use these terms interchangeably or they use these terms for referring to a same person i.e. they consider these two terms are same as per the job description. Sometimes larger companies also seem to be confused about these terms. Therefore, in this article, we are trying to define these terms or we are going to discuss these terms as per their job description.

So let's learn about Web Designer:-

A Web Designer is a person who does the graphical design of the website or web application and so we can say that a web designer mainly works in HTML or CSS or use another graphical program like Photoshop or illustrator etc.

A web designer designs the graphical user interface and also designs the different things like icons, typography, Color schemes and all the styles cape of the web page.

Let's learn about Web Developer:-

A Web developer, on the other hand, is usually a development part of the web project. So you have a web developer who does the programming or coding in PHP, Java, or Flash etc. The developer thus ties these things together and also works with the database structure, in case if your site deals with database structure.

The developer does the connection to other websites like Facebook interfacing or Twitter interfacing etc. So a developer engineers the program that makes the website run properly.

Some of you might want to know that Can I hire a person who is both a web designer or web developer? Then the answer is Yes! You can.

These people are called by different names like Hybrid - designer or User Experience Designer and these people usually do both i.e. Web Designing as well as Web Developing and they are usually skilled in user experience i.e. What does the user wants to do on their website and how does the user reach his/her goals? Now more and more people are emerging with these skills.

Usually, a good web designer focuses on the designing part of the website or project. It is good to have someone who really focuses on these graphical part of the website or project and it's really good to have someone who is really sincere about designing. At the same time, it is really good to see someone who is really good at developing a program behind the website or application.

But some people really love doing both i.e. web designing and web developing and they love to be creative i.e. designing the graphical part of the website as well as styling the website. There are some people who think that with this ability you cannot focus on both designing and coding things. They think that there is a lot more to learn in this case, who some people don't like to do. But if you are really interested in doing both the things then you should do it and you will definitely become good with it at some point.

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7 Best Web Hosting company for Indian Websites

There are many hosting providers who offer low-cost hosting but in return, you get very fewer features which hurts your online growth. Therefore, it is very important to choose a hosting provider depending on the following important features:-

1. Uptime

2. server location

3. cost

4. customer support

5. space & bandwidth

6. Local Hosting Provider

Indian Best Web Hosting (Based on Latency Analysis)

In a glance, here are the seven best web hosting companies I recommend for Indian websites.

Web Host	Server Location	Response Time (from India)		Speed Rating	Price
		Bitcatcha	W.P.Test
BlueHost.in	Mumbai	107 ms	117 ms	B	₹259/mo
Hostripples	Pune	109 ms	190 ms	B	₹35/mo
ZNetLive	Noida	118 ms	161 ms	B	₹49/mo
HostingRaja	Mumbai, Hyderabad, Bangalore	86 ms	337 ms	B	₹99/mo
HostGator.in	Mumbai	109 ms	343 ms	B	₹222/mo
BigRock.in	Powai	112 ms	324 ms	B	₹89/mo
FastWebHost.in	Delhi	115 ms	209 ms	C	₹75/mo

1. Bluehost

website- https://www.bluehost.in/

Bluehost India is a sub-brand of Endurance International Group and has been providing a plethora of web services which includes cloud hosting, Linux and Windows hosting, WordPress hosting, VPS, dedicated servers, domain registration and other allied services.

Bluehost has state of art next generation Virtual Private Servers which are powered by Virtuozzo, NetApp, and CentOS. All the servers are backed up by Intel/AMD processors, high-performance RAM, RAID drives etc for optimum performance. Bluehost has a dedicated support team which works 24 hours 7 days a week around the year.

Visit- Bluehost

2. Hostripples

website- https://hostripples.in/

Hostripples has been providing the cheapest price website hosting and allied services for over 5 years with its offices in India and USA. The core competencies of the company include shared hosting, reseller hosting, VPS hosting, Cloud hosting, dedicated servers, email hosting, domain registrations and lots more.

The servers are located in India (Pune) as well as Singapore, Canada, UK, France, Poland and at other locations where they provide a Geo-IP location. The data center boasts of the uninterrupted power supply, hi-end hardware, automatic smoke system, N+1 redundant HVAC, digital video surveillance, multiple network carriers etc.

Visit - Hostripples

3. Znetlive

website- https://www.znetlive.com/

ZNETLIVE started its business operations in the year 2001 and it was founded by Munesh Jadoun. ZNETLIVE has around 11 office spaces in India and abroad with more than 100 employees working round the clock to ensure optimum web services.

The services provided by them includes dedicated hosting based on Windows and Linux platform, Virtual private servers, CMS hosting, Cloud hosting, domain name registration, business email, complete cloud management and lots more.

ZNET has state of art data centers in India, USA, and Germany. The servers used by them include Intel Atom D525, Intel Xeon E3-1230 v3, Intel Xeon E5-2670 and many others.

Visit - Znetlive

4. Hostingraja

website- https://www.hostingraja.in/

HostingRaja has been providing website hosting services in India for over a period of time and has earned the trust of more than 150,000 customers. Website hosting services provided by HostingRaja includes domain registration, VPS based on Linux and Windows platform, Linux and Windows hosting, Java Hosting, dedicated servers, cloud hosting and more.

The hosting provided by them is optimized for LiteSpeed Web server which has built-in anti-DDoS, inbuilt cache, JS/CSS compression for faster loading, Gzip compression and lots more.

Visit- Hostingraja

5. Hostgator

website- https://www.hostgator.in/

HostGator was incorporated on October 22nd, 2002 by Brent Oxley in a dorm room in Florida. After a successful stint in the USA, HostGator expanded its business operations and started branches in various countries including India.

HostGator started its business operations in India by opening branches in Mumbai and Banglore in the year 2012 and since then has been providing services like web hosting, cloud hosting, WordPress hosting, VPS, dedicated servers, domain registration and lots more. HostGator servers are located in India thus ensuring better speeds for the users.

Visit- HostGator

6. Bigrock

website- https://www.bigrock.in/

An ICANN Accredited domain name company, BigRock has been providing a wide range of web services in India for quite a few years. The services provided by them includes domain name registration, email hosting, VPS hosting, website hosting, cloud hosting, website design, dedicated servers and lots more.

All the servers owned by Bigrock comes with built-in or pre-installed web applications like WordPress, Joomla, Magento etc for easy one-click installation. Bigrock servers are from Dell and they boast of features like Dual Quad Core Xeon CPUs w/32 RAM for Windows hosting and Dual Quad Core Xeon CPUs w/62 GB Ram for Linux hosting.

Visit- Bigrock

7. FastWebHost.in

Website: https://www.fastwebhost.in

FastWebHost.in is a privately held web hosting company who ventured in California and extended their service to India and Europe later.

They feature to drag and drop website builder at free of cost with all plans. There are 190+ pre-made templates which you can use to build your site.

They offer 24/7 live chat support. And also there are all-day phone support and support ticket system.

Visit - FastWebHost.in

Differences between SQL and NoSQL Explained

In this tutorial, we are going to discuss differences between SQL and NoSQL at the same time we are going to see the reasons which will help you to select best out of them.

Let's first discuss the Relational Database. We know that in Relational Database things are stored in tables and it came out in 1970s from IBM and then Oracle took it on and really made it a thing. Common databases that are relational are obviously Oracle, MySQL, and Postgres which is an open-source version which is similar to MySQL.

Now let's discuss NoSQL. NoSQL started mostly in early 2000 that's one of the improvements. Mostly Google, FaceBook, Amazon etc. have a huge amount of data to handle therefore thought there may be a different way to do it. So started creating different formats for databases. Thus You have different databases like Key-Value databases, Column Family Databases, Graph Databases and Document Databases.

Key-Value Databases: - Which essentially have a key which you can hash and find your value. For Ex: - There are common databases which are used by Reddit, Amazon SimpleDB etc.

Column Family Databases:- It is also similar to Key-Value databases, in which you are hashing keys to values but instead of hashing keys to single values the keys are hashed to a whole family of columns. Common Column Family Databases are Cassandra etc.

Document Databases: - Which we use in MongoDB. In which whatever you want to put into, you can add it into Document and embed it. You can embed more documents. Basically whatever you want to embed into it, go down as far as you want into a rabbit hole. CouchDB is a common document database.

Graph Databases:- These are more commonly used for really big complex data in which you have a node that can have properties on it and then you have edges that connect to those nodes. The Graph Databases have their own special languages but not many people use them, but they are really good.

Let's see Why so many people like RDBMS's:-

The Big advantages of using RDBMS's are:-

1. Structure:- It is easy to join the table and search for any information through it as these are organized.

It helps in Error checking, enforces relationships. You end up with reduced duplications, Only update in one place.

2. Fast Joins:- Cross-indexed index stores where foreign id's object is in the other table. It is a query optimizer. It supports documentations, Stack overflows. It is stable and also helps in Reporting and analysis across relations.

SQL Databases and NoSQL databases do ACID Compliance.

•  Atomicity:- it is all or nothing i.e. the idea is to do all the transactions or nothing. If any error occurs in between then you will have to reverse or repeat the process.
• Consistency: - All the data written to databases must be valid like Foreign Keys, Data types, Unique, Not Null. Databases should have a unique name.
• Isolation:- Stops collision between multiple changes to the same document.
• Durability:- Once executed, data is immediately saved to disc.
• Transactions let you make complex, multistep actions.
• It provides either all consistency or nothing.

Why people started looking for new ways when they have been using RDBMS's for such a long time?

Because: - They need more speed and large data sets and unstructured data needs to be handled. Large data like - Google, Facebook, Amazon etc.

Benefit's of NoSQL:-

1. Flexibility: - It is flexible enough to store non-structured data. It is easy to change the fields.

2. Easy to use: - It is easy to use and get running.

3. Web-scale:- Non-relational makes easy distributions and fast queries.

4. No Normalization is required, only JSON - Format when you don't have one document with a bunch of nested data. We have all done a lot of relational data with MongoDB it's possible.

5. The Relations are slow and can get messy.

6. Not ACID Compliant

7. Data is less secure against errors and loss and also the data is not immediately persisted.

Confused Between Free Vs. Paid Web Hosting ? Let Me Help You

The first thing that a lot of people want to know when they are starting with their website online is about Web Hosting. They have questions like Do I need web hosting? what kind of web hosting should I choose? The answer to these questions is sometimes easy and sometimes difficult. Today we are going to discuss which web hosting is best: Free Web Hosting or Paid Web Hosting?

What is Web Hosting?

Renting space on the web server for making your website online. Only designing and developing a website is not the thing, you will need to publish all your websites files on the internet so that the people are able to see it. Web hosting helps in publishing your files on the server.

Who are these people which ask such questions - Generally they are families doing family business or small businesses who want to tell the people about their products and services etc.

There are many Best Web Hosting Companies which provide free web hosting as well as paid web hosting.

Free Web Hosting: Free solutions can be used, but it can come with a catch. The free websites also look good. They require very little time for designing if the contents are already with you. Free Hosting initially feels good but afterwards, you feel like as if you are trapped. It may happen that the hosting provider may set some rules/ restrictions on the number of visitor's to your site, means a number of your visitors should not exceed more than a particular number etc. So if your visitor's number increases then they can start charging you.

You are the owner of your website. So don't want anything to mess with it. Free hosting sometimes the hosting providers may ask you to display their banner on your website, which is not a good practice or they may not allow you to register your choice of domain name. They may provide you with their own domain name. Thus the benefits of having a paid version completely outraged by the free version.

Clients need a web hosting because they cannot do it on their own and if their business is in the initial stages then they prefer free hosting, but later on, when the traffic to their sites increases then they want to move on with a paid hosting and it becomes very problematic. Because sometimes your contents may not support the transitions or may require to do a copy paste. Which will not be good for your business.

Free hosting is very limited. You can customize a little bit. You cannot get premium resources as they are not free. They may charge you more when you try to get more customized. This is a big disadvantage of free hosting.

Free hosting providers may provide only an editor but no backend so it is very difficult to customize a website.

Paid Hosting: As the name sounds it is a paid hosting, you are paying for hosting your website. You are using this because you would be able to use a lot of new features that is a lot of customizability and a lot of resources at your system.

If you go for a paid version then the hosting providers will provide you with all the support. You can get a domain name of your choice it's like a one-stop-shop where you will get all kinds of services that are required at affordable prices. If there were 20 visitor's per day visiting your site then they may get converted into 200 visitors per day. Thus the conversion will improve with a paid hosting. Which will be beneficial for your business.

There experts team can provide you with any help at any time. There are various types of web hosting like Shared Hosting, VPS/Cloud hosting, Reseller Hosting, Dedicated Hosting, Business Hosting, Email Hosting, Linux Web hosting, Windows Web Hosting etc. Which can be provided at cheap and reasonable prices. You can select any of the hostings depending upon your needs.

Hostdens is a Best web hosting company with whom I have been associated for a long time. Their services are of great quality. They provide all types of hosting at cheap prices. They have many happy customers.

Some paid web hosting companies also have their data centres located at various places in the world for making it easy to distribute the information at a fast speed to the internet users. You can select the data centres depending upon your geographical location and can increase the speed of your website. It will ultimately increase the uptime and the number of visitors to your site.

If your website is handling some kind of financial data which involves money transfers or any other private data then there may be a possibility of hacking it. In this case, the paid hosting company plays an important role. They help you in purchasing an SSL certificate. Using it your site will become secure and the rate of hacking will also decrease.

From above discussion, I would like to suggest you to go for Paid Web Hosting.

Websites Vs. Web Applications

A website is a collection of Web pages which contains a combination of text, images, videos, and audios. The Web pages are designed by HTML.

Websites are developed for personal use or they can be developed by the Government for advertising their schemes or they can be developed by an Author for publishing books etc.

There are two types of Websites: 1. Static Website and 2. Dynamic Website.

Let's see each type of these websites in detail :

1. Static Website :

A website is called static website when it is formed by using readymade Web pages. Readymade Web pages mean the content on these pages remains same and whenever you see these pages, the content

will be same.

Let's see how a static website works:

These Web pages containing text, images, video, and audio are stored on a web server. When any user enters their domain name in the web browser then these WebPages containing text, images, videos, and audio gets loaded on the computer screen and thus they can be accessed by the user. These pages are readily available.

2. Dynamic Website :

Let's clarify it using the following example:

If you have seen a website of a Bank account, in which when an account number is entered, then you will get to see the account details of that account holder. Similarly when you enter another account number, then you will see account details of another account holder. Thus we can say that Dynamic Websites are a combination of static and dynamic websites i.e. if we consider the example above bank account page then we can say that the look of each page of the bank account holders will be the same but the information shown in it will be different. Thus we can say that Dynamic websites look and feel remains same only the content on the webpage changes. From the above example, we can say that the Dynamic Websites require databases.

Static and Dynamic Websites can also be explained by another example: Suppose you want to purchase a readymade shirt of a particular size then you will get to see a lot of shirts of that size with same features and fitting but when you want a tailor-made shirt then first the tailor will take all your measurements and will stitch a shirt for you as per your choice.

Dynamic WebPages are programmed WebPages. Dynamic websites can be developed by Servlets or JSP or Asp.net or PHP. Thus for developing Dynamic websites, you will need to have knowledge of Servlets or ASp.net or PHP.

Web Applications:

Web Application is a large program which is a collection of functions.

For Ex. If we see MS Word application, in that all the activities which we do calls a specific function related to that activity from the background. If we are checking the spelling of a particular word then it will call Spell-check function from the background. Similarly, if we want to add a header or footer then that specific function will be called.

In Web Applications, Interface is inside our machine and all the related functions are in the web server. These web services are called Web Applications.

Web Services can be developed in Java, Perl, Python etc. Nowadays we can see various web applications being made available on the mobiles. They use Ajax i.e. XML. One of the examples of a Web Application for mobiles is Gmail. When the user wants to check the emails, he/she signs up into Gmail and in Inbox clicks on the email which they want to see, and in a few seconds, the email gets loaded on the screen. The technology which is mostly used for development of mobile Web Applications is Android.

Development of the Web Applications can be made easy by using various frameworks for the web applications such as Django, Ruby etc. These frameworks help in fast web application development. These frameworks also help the developers to concentrate more on the application than to solve the issues of the users. Now a day's many open source software's are available which can be used for the framework.

If you want to decrease the errors in programs then the web application framework should be used which will make the coding simple and help the developers to concentrate more on the web application framework.

There are some sites which are sensitive to hacking online then the developers should try to solve these errors. Thus if the security feature of the web application is looked after from the beginning then that application will create fewer problems and can be used for a  long time.

What is SEO and its types?

 Online visibility of a website or a webpage in the web search engine results depends on the SEO. SEO is an abbreviation for Search Engine Optimization. If any website is ranked higher in the web search engine's results means that the website is visited by more number of visitor's and later on these visitor's can be converted into customer's. Thus SEO is a tool to enhance the ranking of a website in web search engine's result page.

         There are 2 types of SEO: 1. On-Page SEO and 2. Off-Page SEO.

1. On-Page SEO:-

            It is used to advance individual website pages to higher rank and get more traffic in web search engine. Keywords or catchphrases plays important role in it, like meta tags, meta descriptions, page titles etc.

            It is a good practice that one should use thematic keywords or meta tags. Which means the keywords or meta tags used on your website should be related to the subject. You can also use your domain name or brand name with keywords. For example- if your brand name is Hostdens, instead of using keyword Best Web Hosting Company, you can use Hostdens Best Web Hosting Company.

2. Off-Page SEO:-

           It includes link building i.e. it alludes to all the exercises that guest's do from your site to raise the positioning of a page with on web crawler. We can also say that Off-Page SEO happens outside the website for example- if you write a guest post for another blog or leave a comment then it is Off-Page website promotion.

            If you want to improve your Off-Page SEO then you should link all your pages properly. You should give more emphasis on providing good quality pages and not good quantity pages so that more visitors will get tempted to visiting your site. In Off-Page SEO, the inner pages of your website or blog should be meaningful and well-structured and the links between pages should be distributed evenly. You can use keywords and meta tags wisely to link your pages.

SEO Techniques are broadly classified into 2 categories:

1. White Hat SEO and  2. Black Hat SEO

1. White Hat SEO:-

An SEO technique is considered as White Hat SEO technique if it is recommended by search engines as part of a good design.

Any SEO technique is considered as White Hat SEO if it has following features:

·        It follows search engine's guidelines.

·        It does not involve any deception.

·        It ensures that the content search engine ranks are the same content a user will see.

·        The contents are created for the users and not just for the search engines.

It also ensures good quality of the WebPages and the content on the web page is useful.

2. Black Hat SEO:-

An SEO Technique is considered as Black Hat SEO if search engines do not approve these techniques and attempt to minimize their effect. These are also known as spamdexing.

Any SEO technique is considered as Black Hat SEO if it has following features:

·        It involves any deception.

·        It redirects to a page that was different from the page the search engine ranked.

·        Keywords used are unrelated to website content. It is called as meta tag stuffing.

·        Creating a copy of a popular website which shows contents similar to the original website, called as page hijacking.

           

           

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