Tutorials

Basic Terminology


Internet


Internet is popularly known as network of networks.

Internet helps any computer system/mobile to connect with any other computer system globally using TCP/IP protocol. TCP/IP protocol is also known as Internet protocol.

Internet identifies each system in the network through a unique address known as IP address. Each computer system has a unique IP to distinguish from other computer on the network just like voter id of human beings.

 

Example

When you type 'Tutorials In Hand' on Google then your search query is sent via internet to a special computer known as Domain Name Server (DNS). 

DNS will resolve the query string 'Tutorials In Handto unique IP address that is assigned to it.

This IP address takes you to the computer on which the website is hosted. This is how you get to see our website or any other website that you search.

 

The amount of data that is transmitted in a fixed amount of time through internet (network connection) is known as bandwidth.

The bandwith is measured in bits per sec (bps) or kilobits per sec (kbps) or megabits per sec (mbps)

Advantages of Internet

  • Access vast information → Lots of information on any topic is available on internet and can be searched and referred anytime.
  • Online services → Various online services are available over internet like online banking, online shopping, online payment, etc.
  • Social Networking → Social networking like facebook, linkedin, twitter, etc has helped people from diverse location get connected, share and exchange their views.
  • Digital Education → Internet has helped education go digital. Lots of tutorial are available on internet on youtube channels and more free and paid materials are available on various blog or websites.
  • Online Entertainment → Various websites provides source of online entertainment like watching movies or tv series of your choice on demand. Online games are available. 
  • And many more → This is not the end. Internet has lots of advantages to offer.

Disadvantages of Internet

  • Cyber crime → Internet has given rise to cyber crime.
  • Hacking → Hacking of an individual system illegaly with intent to gain access to their personal detail and sensitive data like banking id and password, etc has also increased over the internet. To be safe you should never click links send over mail from unknown persons, do not download data from unsecured websites, keep strong password, etc. 
  • Spamming → Spamming is another problem on internet. People send unnecessary email in large volume thus blocking the whole system and leaving no space for important mails.
  • Virus attack → Virus hampers the usual operation capability of the computer system.The system connected to internet has high probability of virus attacks.Virus may result in your hard disk crash, system freezing unnecessarily, etc.
  • Prone to network disruption or outage hampering services temporarily.


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