Identify two reasons why errors can occur when using wireless technology to transmit data.
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Identify two reasons why errors can occur when using wireless technology to transmit data.
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Four 7-bit binary values are transmitted from one computer to another. A parity bit is added to each binary value creating 8-bit binary values. All the binary values are transmitted and received correctly.
Identify whether each 8-bit binary value has been sent using odd or even parity by writing odd or even in the type of parity column.
8-bit binary value | Type of parity |
---|---|
01100100 |
|
10010001 |
|
00000011 |
|
10110010 |
|
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The contents of three binary registers have been transmitted from one computer to another.
Even parity has been used as an error detection method.
The outcome after transmission is:
No errors have been detected in Register A and Register C.
An error has been detected in Register B.
Complete the parity bit for each register to show the given outcome
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Victoria is entering data into a computer system. The data will be transmitted to cloud storage.
A check digit is used to check whether data is correct when entered into the system.
Describe how a check digit can be used to make sure the data entered is correct.
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Why is it important for computers to check that data is in the expected format?
Provide one example of a format where errors could occur.
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Data will be checked using a checksum.
Describe how a checksum can be used to check that data entered into a system has been transmitted correctly
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Explain how the Automatic Repeat reQuest (ARQ) protocol ensures data integrity during transmission
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