What is the internet? List any four services available on the internet.

The browsers that provide facility of the internet services to the users is called ISP (internet service provider).
Any 3 ISPs of Nepal are:
        - Mercantile Office System (MOS)
        - World-LINK
        - NTC

The types of internet accesses are:
        - Wired access.
        - Wireless access.

The websites which allows the users to search information based on a keywords and links the users to the websites with the appropriate result is called search engine.
Any three popular search engines are:
        - yahoo.com
        - google.com
        - msn.com

WWW is one service provided by internet which provides information about different topics or subjects.

A website us the collection of different web-pages that contains the information about some particular topics or subjects that can be accessed by specific domain name.
Any two websites of Nepal are :
        - www.askmattrab.com
        - www.ntc.com.np

The difference between website and web pages are:

Web browser is a program that displays pages of a website on the user's computer sending the codes or downloading the codes of website.
Any three web browser are:
        - Google chrome
        - UC browser
        - Opera Mini

Electronic mail is one of the popular, reliable, convenient and secure way of sending and receiving mails through the internet at far distance.
Its advantages are:
        - It is fast, easy, reliable and secure.
        - It can be used at anytime at any places.
        - Also files attachment can be sent.
        - The physical presence of...

The services of internet that enables us to send and receive instant messages by using yahoo or msn messenger is called chat.
Its advantages are:
        - It enables us to send and receive messages.
        - It is easy and cheap means of communication.
        - It is reliable and secure.
        - It allows both text and voice chatting.

Any four websites that provides e-mail services are:
        - yahoo.com
        - altavista.com
        - google.com
        - msn.com

The most advanced services of internet that enables virtual face to face communication among people sitting at different location is called video conference.

The websites which provides facilities to the users for purchasing and selling goods through internet is called e-commerce site.
Any three ecommerce sites are:
        - www.hamrobozar.com
        - www.amazon.com
        - www.kinmel.com.np

The private computer network owned by a company or an organization and accessible only to its employees is called intranet.
Any four features of it are:
        - It runs on private networks within a network.
        - It is closely related to internet.
        - It serves as a powerful tools for communication within an organization.
...

The task of HTTP are:
        - It helps to communicate between web client and web severs.
        - It moves the request made by web browsers to web servers and respond the request.

The task of FTP are:
        - It helps to transfer files through FTD.
        - It helps to download huge amount of data fastly.
        - It helps to request file from client computers.
        - It helps to provide files to client from server.

We can get following facilities from the internet:
        - WWW
        - E-mail, chat, video conference, telnet.
        - E-fax, file transferring.

a.    E-mail and E-fax.

b.    Internet and Intranet.

WWW:    World Wide Web
URL:    Uniform Resource Locator
ISP:    Internet Service Provider
FTP:    File Transfer Protocol
E-mail:    Electronic mail
ISDN:    Integrated Service Digital Network
VOIP:    Voice Over Internet Protocol
Telnet:    Telephone Network
IRC:    Internet Relay Chat
PSTN:    Public switched Telephone Network

a.    Selling or buying goods on the internet.
        - E-commerce

b.    A private internet.
        - Intranet

c.    A service of internet that allows the user to post question for discussion.
        - Newsgroup

d.    A service of internet that allows a user to connect a remote computer.
        - Telnet

e.    Internet service that helps us to send and receive instant...

Telnet is a service of internet that allows a user to gain remote access to computer a interact with it.

Some of the examples are listed below:
        a) TeamViewer
        b) AnyDesk