When two mobiles are connected using Bluetooth to transfer a picture file, a PAN(Personal Area Network) is created.

Advantage of bus topology In bus topology, computers can be connected with each other using server (host) along a single length of cable.

Four computers can be connected with each other using server in the following way:

HTTP   HyperText Transfer Protocol.

ARPANET Advanced Research projects Agency Network.

Protocol is a set of rules that two or more computers must follow to communicate on network.

WWW (World Wide Web) is used for searching information from Internet browser.

Switch provides a dedicated line at full bandwidth between two devices but hub doesn't provide a dedicated line. Hub share the banndwidth.

In star topology, nodes are connected to server individually whereas in bus topology all nodes are connected to server along a single length of cable.

A modem is a data communication equipment that facilitates data communication through telephone lines. It is used to convert digital data into analog and vice-versa.

Characteristics of 2G mobile technology is that, it has introduced data services for mobile, starting with text messenging.

Characteristics of 3G mobile technology is that is faster than 2G suppotrs video calling.

Chat generally involves one-to-one communicatio. On the other hand, video conferencing means more than two persons are involved in a discussion.

(i) GPRS       General Packet Radio Services

(ii) CDMA      Code Division Multiple Access     

(iv) GSM        Global System for Mobile Communication

Characteristics of Wi-Fi are as follows:

(i) It is a wireless solution for getting connected to the Internet.

(ii) It is handy as well as available throughout the journey.

In order to chat, you need have an account on the same service as the person you are chatting with.e.g.on the other hand, in case of E-mail, it is not necessary,i.e. you can have an account from any provider and you can establish your own.

(ii) Getting into unknown person's social networking account and start messaging on his behalf.

(ii) Volp

(i) HTTP   HyperText Transfer Protocol.

(ii) VoIP     Voice over Internet Protocol

The main difference between virus and worm is the method by which they reproduce and spread. A virus is dependent upon the last life of boot sector and the transfer of files between machines to spread, while a worm can run completely independent and spread itself through a network connection.  

Client-side scripting language-VB script

Server-side scripting language-ASP

Web 2.0 is associated with a web application that facilitates participatory information sharing. interoperability user-centered design and collaboration on the world wide web. It allows the user to interact and collaborate with each other in a social media dialogue as creators of user-generated content in a virtual community.