2.1 Types and Methods of Data Transmission Cambridge IGCSE 0478

What is the purpose of dividing data into packets?

• To make transmission more efficient and manageable

• To increase the overall file size

• To reduce the need for routers

• To prevent the need for error checking

What part of a data packet contains the actual transmitted information?

• Payload

• Header

• Trailer

• Packet number

What does the packet header contain?

• Metadata such as destination and originator’s address

• The actual data being sent

• Error correction information

• The order in which packets are displayed

How do packets travel in packet switching?

• Each packet may take a different route to its destination

• Packets always take the same fixed path

• Packets are transmitted one at a time without routing

• Packets must be received in the exact order they were sent

Which method of data transmission sends one bit at a time over a single channel?

• Serial

• Parallel

• Half-Duplex

• Full-Duplex

Which transmission method allows data to be sent in both directions at the same time?

• Full-Duplex

• Half-Duplex

• Simplex

• Serial

Which data transmission method is most suitable for long-distance communication?

• Serial

• Parallel

• Simplex

• Half-Duplex

Which of the following is an example of half-duplex communication?

• Walkie-talkies

• A keyboard sending input to a computer

• A phone call

• USB file transfer

What is the main advantage of using USB (Universal Serial Bus) for data transmission?

• It is a widely supported standard for connecting peripherals

• It can transmit data in parallel mode

• It does not require serial communication

• It only allows for one-way communication

How does USB transmit data between devices?

• Using serial transmission, bit by bit

• Using parallel transmission, multiple bits at once

• Using packet switching across multiple networks