Types & Methods of Data Transmission (Cambridge (CIE) O Level Computer Science)

Julia inputs personal data into her computer.

She stores three copies of the data using a hard disk drive (HDD), a solid state drive (SSD) and a USB flash memory drive.

Julia uses a USB connection to transfer data onto her USB flash memory drive.

One benefit of using a USB connection is that it is a universal connection.

State two other benefits of using a USB connection.

Benefit 1 .................................................................
Benefit 2 .................................................................

[2]

A student has a sound file that is too large to be stored on their external secondary storage device. The student compresses the sound file to make the file size smaller.

The compression method used reduces the sample rate and the sample resolution of the sound file.

The student sends the sound file to a friend. The file is transmitted across a network that uses packet switching.

Identify two pieces of data that would be included in the header of each packet.

A company has a website that is stored on a web server.

The website data is broken down into packets to be transmitted to a user.

Describe the structure of a data packet.

The website hosts videos that users can stream. The company uploads new videos to the website.

The company uses parallel half-duplex data transmission to transmit the data for the new videos to the web server.

Explain why parallel half-duplex data transmission is the most appropriate method.

A student has a sound file that is too large to be stored on their external secondary storage device. The student compresses the sound file to make the file size smaller.

The student sends the sound file to a friend. The file is transmitted across a network that uses packet switching.

Explain how the file is transmitted using packet switching.