Answer: Operate over existing telephone lines to carry voice, data, and video.
Explanation:
Digital subscriber line is a means of transferring high bandwidth data over a telephone line. Such data could be a voice call, graphics or video conferencing. DSL uses a user's existing land lines in a subscriber's home, allowing users to talk on a telephone line while also being connected to the Internet. In most cases, the DSL speed is a function of the distance between a user and a central station. The closer the station, the better its connectivity.
Answer:
Portrait orientation is taller then it is wide, while landscape orientation is wider then it is tall.
Explanation:
Databases use fourth-generation languages in order to access its contents. These fourth-generation programming languages are widely used in database managing. It was designed to have a more specific use in contrast to the commonly used 3G languages at that time.
Computer has become very important nowadays because it is very much accurate, fast and can accomplish many tasks easily. Otherwise to complete those tasks manually much more time is required. It can do very big calculations in just a fraction of a second. Moreover it can store huge amount of data in it.