Error Detection Methods of Data Tranmission

Extra bit sent with each byte of data

• Checksum

• Parity check

• ARQ

If an error is found, a request is made to re-send the data

• checksum

• parity check

• ARQ

Data Transmission when data is transmitted both ways at the same time

• Serial

• Simplex

• Duplex

• Half duplex

________ is the term used to describe the message before it is encrypted?

an error that can not be detected when bits change their position is called _____________

When carrying out asymmetric encryption, which of the following users would keep the private key?

• the sender

• the receiver

• none of them

• both sender and receiver

Which of the following is the form of error detection that makes use of the system of acknowledgements and timeouts?

• parity bit

• ARQ

• cyclic redundancy check

• check digit

_____________ is generated after encryption.

• plaintext

• ciphertext

• encrypted message

• session key

Which of the following describes the check where the receiving computer sends back a copy of the data to the sending computer to allow it to compare the data?

• echo check

• checksum

• ARQ

• check digit

A data communication system is made up of hardware, software and communications facilities

• True

• False

• None