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Wednesday, June 13, 2018

Internet

Internet
International network
Information highway
Network of networks
World’s largest network,
An example of connectivity
Worldwide interconnected network.
A network that links computer allows them to
share information.

Arpanet
Arpanet adavans research project agency
network.
First computer network is Arpanet made by
America.
Internet begun with Arpanet in 1969 at USA.
Internet started in India 15 Aug 1995


ISP internet service provider
Jio bsnl Vodafone airtal are ISP

IT - information technology
Im - instant messaging
Ip - internet protocol

Ip address
Each computer on internet has its unique ip
address. By which it is recognized.

Server - which send data to user
Client -user, node which request
Chatting - communication with text message
Download - To get data from server
Upload - To send data to server

Useful study material of computer for
banking rscit and all competitive exam

Online - When computer is connected to
internet.
Offline - Not connected to internet.
Virus - Vital information resource under seize
Harmful programs.
At could damage your computer system.
Eg Trojan horse
Antivirus - application software to protect from
Virus
Norton, np

Social sites
Also called reuniting sites connect people
Face book
Twitter
Whats up


Web Browser
Program provide access to web resource
Internet explorer operamini, uc browser, Google
chrome, mojila Firefox
Plug ins - program run on web browser
Mosaic - first web browser developed by mark
addition

Search engine –
Search engine locate information in www
and show hits list.
Google, yahoo, msn Search engine.

Meta search - engine are special search engine
that spread search
On various search engine


e - Mail
Electronic mail: - transmission of message or file
throw network
E-mail developed by ray tomlition.
To send e mail is like letter writing.
Part of e mail [sender, receiver subject, cc, bcc,
attachment, signature]
Cc:-carbon copy
Bcc:-blind carbon copy
Subject: - brief info about mail
Attachment: - document or file that we send with
e mail.
Spam: - unwanted e mail
Email address has two part user name and
domain name.
cloudlearning7@gmail.com
User name domain name
You must use @sign in your e mail address.
Space not allowed in e-mail account


Mailbox - storage for e mail
Sent box - consist sent mail
Drafts - retains ready to use mail
Spam - Contains unwanted e mail
Header - part of mail contain subject address
attachment
E mail auto complete from and date.

Protocol for E Mail
SMTP - simple mail transfer protocol
Pop - post office protocol
Free e-mail service provider website: - Gmail,
yahoo, redif mail

Www
World Wide Web
Collection of web page
A system of interlinked hypertext documents that
are accessed via internet


Tim burner li founder of www.

Web page
Web page is html document or any page of www
To reload a web page press refresh button.
Flash – small program run on web page provide
animation.

Website
Set of related web page served from a single web
domain
One or more web page created by an individual or
org and posted on the www.
Main page of web site is called home page or
index page.
Web site address start with www

Ex. www.facebook.com


URL: - uniform resource locater
Retains address of web resource
URL Start with http://

Hyperlink
A link between two web pages.
When pointer is positioned on hyperlink it is
shaped like hand
To insert hyperlink press ctrl+k
To create web sites is called web authoring
Vickes are web site in which user easily post and
modify
Graphics map - program of design of web sites
Blogs are personal sites
Filters - program that stop accessing selected
sites or limit internet access




Dns [domain name system]:-
Convert ip address to domain name.
Contain address of websites
Change text based address to ip address

Top level domain:-
Last part of domain name
It also called domain code

.edu - education site
.com - commercial site
.in - India
.org - organization
.net - network
.gov - government


Firewall - Is a security system to provide
security from external Attack.
Firewall is a barrier btw internet and computer.
Packet - a breaked part of message sent over
internet
Cookies - Store address of frequently visited web
site
Histroylist - Address of recently visited websites
Bookmark - store address of the web page.
Intranet - A personal network of an organization
equal to internet
Extranet - A personal network that connect more
than one origination.
Proxy server - is a system security computer in
firewall decides message or file is secure to send
or receive in the network.
Navigation - Moving from one web site to
another.


Authentication - Check the user identity.
Using otp [one time password]
Authorization - Allow user to access website
Password - To secure information
Unauthorijation - denial to access

Internet banking - banking throw internet.
Internet banking medium - Net banking
Credit card
Navigation - Moving from one site to another
site is called Navigation

Hack - to access system illegally
Hacker - person who hacking
Hacking - trying to access system illegally


Troubleshooting - to digonios and rectify problem
Dial up: - slow speed internet connection.

Sign up: - create new account.
Log in: - access already created account.

E commerce
Buying or selling product online

Three type of e commerce
B2b:-business to business
b2c:- business to customer
c2c:- customer to customer
E commerce sites
Amajan
Flip cart
Bigbazar


Video sites
YouTube

Irc - internet relay chat


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