Computing A level AQA

What is the bit rate

• The speed at which data is transmitted serially.

• The amount of data that can be transmitted in a fixed amount of time.

• The rate at which the signal changes

• It measures how many bits are used in images

What is the baud rate

• the time delay between the moment the first byte or packet of a communication starts and when it is received at its destination.

• The speed at which data is transmitted serially is measured in bits per second.

• the amount of data that can be transmitted in a fixed amount of time.

• The rate at which the signal changes

What is bandwidth

• The speed at which data is transmitted serially is measured in bits per second.

• the time delay between the moment the first byte or packet of a communication starts and when it is received at its destination.

• the amount of data that can be transmitted in a fixed amount of time.

• The rate at which the signal changes

Latency

• The speed at which data is transmitted serially is measured in bits per second.

• it is the time delay between the moment the first byte or packet of a communication starts and when it is received at its destination.

• The rate at which the signal changes

• the amount of data that can be transmitted in a fixed amount of time

What is synchronised transmission

• bits are sent via an interface one bit at a time over a single wire from the source to the destination.

• data is transferred at regular intervals that are timed by a clocking signal, allowing for a constant and reliable transmission

• used inside the computer and for very short distances of up to a few metres

• One character at a time is sent, with each character being preceded by a start bit and followed by a stop bit.

What is Parallel transmission

• bits are sent via an interface one bit at a time over a single wire from the source to the destination.

• One character at a time is sent, with each character being preceded by a start bit and followed by a stop bit

• data is transferred at regular intervals that are timed by a clocking signal

• used for very short distances of up to a few metres. Bits are sent across multiple different wires which can cause skew.

What is the peer to peer architecture

• It is a network that is suitable for small companies and it isn’t very secure. It is very cheap to set up and maintain.

• It is suitable for many different types of organisations and it is very secure thanks to he central server. However, it is very expensive.

• data is sent as one long stream or block of data, with no gaps in the transmissions.

• the time delay between the moment the first byte or packet of a communication starts and when it is received at its destination.

What is the client server

• it is a cheap and effective form of serial transmission.

• The server is a powerful computer which provides services or resources required by the client. It is suitable for different types of organisations and it is very secure . However, it is very expensive.

• It is suitable for small companies and it isn’t very secure. It is very cheap to set up and maintain.

• data is transferred at regular intervals that are timed by a clocking signal, allowing for a constant and reliable transmission for time-sensitive data.

What is the Von Neumann architecture

• Instructions and data are stored in a common main memory and transferred using a single shared bus,

• Separates the data and instructions into separate memories using different buses.

What is the Harvard architecture

• Separates the data and instructions into separate memories using different buses.

• Instructions and data are stored in a common main memory and transferred using a single shared bus,