ACARA 7-8 Digital Technologies: Data integrity and error detection
Students learn how transmission errors happen and how parity, checksums, echo checks and ARQ detect them and get data resent so it arrives complete and correct.
One content description (AC9TDI8K02) from the full ACARA Digital Technologies Years 7–8 — Wired and Wireless Networks journey. All 24 modules below are in that journey too, with the same content — add just these to a class, or the whole strand.
Modules (24)
1
What data integrity means in transmission
2
Why data is checked after transmission
3
Interference as the cause of transmission errors
4
Data loss
5
Data gain
6
Data change
7
Identifying loss, gain and change in an example
8
Spotting a missing packet from the packet numbers
9
Error detection versus error correction
10
Parity bit
11
Even parity
12
Working out the parity bit for a byte
13
Checking a received byte for a parity error
14
What a single parity check cannot detect
15
Checksum
16
Checking a checksum at the receiver
17
Echo check
18
Positive acknowledgement
19
Negative acknowledgement
20
Timeout
21
Automatic repeat query (ARQ)
22
The ARQ process step by step
23
Comparing the error detection methods
24
Explaining how data arrives intact across a network
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