World Wide Web
The World Wide Web (abbreviated as WWW or W3 commonly known as the Web), is a system of interlinked hypertext documents accessed via the Internet. With a web browser, one can view web pages that may contain text, images, videos, and other multimedia, and navigate between them via hyperlinks.
Internet
The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless and optical networking technologies.
Web browser
A web browser is a software application for retrieving, presenting and traversing information resources on the World Wide Web. An information resource is identified by a Uniform Resource Identifier (URI) and may be a web page, image, video or other piece of content.A web browser can also be defined as an application software or program designed to enable users to access, retrieve and view documents and other resources on the Internet.
Bandwidth
In computer networking and computer science, the words bandwidth,network bandwidth,data bandwidth,, or digital bandwidth are terms used to refer to various bit-rate measures, representing the available or consumed data communication resources expressed in bits per second or multiples of it (bit/s, kbit/s, Mbit/s, Gbit/s, etc.).
Modem
A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used over any means of transmitting analog signals, from light emitting diodes to radio.
Bits,Bytes
4 bits = 1 nibble
8 bits = 1 byte
1 kilobyte = 1024(0r 1000) bytes
1 megabyte = 1024(0r 1000) kilobytes
1 gigabyte = 1024(0r 1000) megabytes
1 terabyte = 1024(0r 1000) gigabytes
1 petabyte = 1024(0r 1000) terabytes
Reboot
To switch a computer off and on again,allowing its operating system and programs to be reloaded.Note that this is not same as placing a computer into stanby/hibernate and then resuming.A reboot requires that all software is completely reloaded
Cookie
A small text file sent to computer by a web site you have visited.These can be very useful in that they can allow the web site to recognize who you are when you return. Cookies cannot store viruses or other threats,although they can be used to track your activity across different web sites in order to provide,for example, "targeted" advertishments.
Firewall
A firewall is a piece of computer software or hardware that restricts the data that is allowed to flow through. Firewalls block traffic that is undesirable in some way, the intention being to prevent infection by malware and so on without restricting the user from carrying out legitimate activity.
Spam
Unsolicited email messages sent out in bulk and generally commercial in nature. In fact the term is used more widely these days to refer to such messages in a variety of places, not just on email for example comments on blogs.
The origin of this sense of the word spam is unclear.
CAPTCHA
CAPTCHA checks are the strings of letters and numbers that have to be typed in on some web pages before something can be saved. They exist because, although humans find interpreting these strings relatively easy, computers do not.Setting up these checks therefore blocks an automated process such as one generating spam from using the page, whereas a human is still able to.

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