Types of online communities.

 Video conferencing definition:-

A Video conferencing is a set of interactive tiles communication which allowed to or more location to interact via  to way audio or  video transmitted simulation.

Advantage of video conferencing:-

1). Two groups which are at distance can organize meeting without traveling and spending.

2). Both Video and audio can be telecast.

3). Vid the help of this technology ahead of fish can give the gather information to and from its branch offices.

4). It saves time and money.

Voice message system definition:-

This technology is used to live messes for people who are unavailable.

Mobile or circular phone conversation definition:-

This is a modern and widely used technology for oral communication. This is small device which is wireless and can be taken anywhere.

Advantage of mobile or circular phone conversation:-

1). It saves time.

2). It is high portable.

3). We can take a cell phone anywhere to send and receive message.

4). These phone are not affected by natural emergency.

 Disadvantage of mobile or circular phone conversation:-

1). It is very expensive.

2). These phone have very longs number which are difficult to remember.

3). one can use them easily.

4). It is a measure cause of accident of roads.