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ACARA Digital Technologies Years 7–8 — Wired and Wireless Networks

How data travels across wired and wireless networks, and arrives intact.

Modules (76)

1 Computer network 2 Data transmission 3 Internet vs World Wide Web 4 Client and server 5 LAN and WAN 6 Network interface (wired and wireless adapter) 7 Network switch 8 Router 9 Modem 10 Wireless access point 11 Tracing data across a network 12 Wired transmission 13 Ethernet cable 14 Fibre optic cable 15 Signal weakening over distance in cables 16 Wireless transmission 17 Wi-Fi 18 Mobile (cellular) networks 19 Bluetooth for short-range transfer 20 Bandwidth and network speed 21 Latency 22 Wi-Fi range and interference 23 Wired vs wireless: speed 24 Wired vs wireless: reliability 25 Wired vs wireless: security 26 Securing a Wi-Fi network 27 Wired vs wireless: cost and installation 28 Wired vs wireless: mobility and convenience 29 Comparing wired and wireless networks 30 Choosing a network type for a scenario 31 Network protocols 32 IP address 33 IPv4 address format 34 TCP/IP: the internet's core protocols 35 Purpose of HTTP 36 HTTP request and response 37 HTTP compared with HTTPS 38 Data packets 39 Why data is broken down into packets 40 The three parts of a packet 41 Packet header 42 Destination address in a packet header 43 Packet number in a packet header 44 Packet payload 45 Packet trailer 46 Packet switching 47 A router controls each packet's route 48 Why packets can take different routes 49 Redundant routes keep a network working 50 Packets arriving out of order 51 Reordering packets at the destination 52 Describing the packet switching process step by step 53 What data integrity means in transmission 54 Why data is checked after transmission 55 Interference as the cause of transmission errors 56 Data loss 57 Data gain 58 Data change 59 Identifying loss, gain and change in an example 60 Spotting a missing packet from the packet numbers 61 Error detection versus error correction 62 Parity bit 63 Even parity 64 Working out the parity bit for a byte 65 Checking a received byte for a parity error 66 What a single parity check cannot detect 67 Checksum 68 Checking a checksum at the receiver 69 Echo check 70 Positive acknowledgement 71 Negative acknowledgement 72 Timeout 73 Automatic repeat query (ARQ) 74 The ARQ process step by step 75 Comparing the error detection methods 76 Explaining how data arrives intact across a network

Smaller journeys, one per content description

The same modules, split up so a class can take just the content description it's working on.

Printables for this journey

Every module above has its own free printable worksheet with an answer key. These crosswords and word searches cover the same terms:

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Years 5–6 Digital Systems Crossword: Inside digital systems and Data and networks (Modules 11–20) 10 clues · Cloud storage, Motherboard, Graphics processing unit (GPU), Network interface (wired and wireless adapter) and more
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Years 5–6 Digital Systems Crossword: Data and networks (Modules 21–30) 10 clues · Data transmission, Wired transmission, Wireless transmission, Bluetooth for short-range transfer and more
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Years 5–6 Digital Systems Crossword: Data and networks and Accounts, passphrases and security (Modules 31–40) 10 clues · Modem, Wireless access point, IP address, Data packets and more
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Years 5–6 Digital Systems Word Search: Inside digital systems and Data and networks (Modules 1–20) 20 words to find · Digital system, Hardware, Software, Input, process, output and storage and more
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Years 5–6 Digital Systems Word Search: Data and networks and Accounts, passphrases and security (Modules 21–52) 20 words to find · Data transmission, Wired transmission, Wireless transmission, Bluetooth for short-range transfer and more
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Years 7–8 Digital Systems Crossword: Data transmission and network security and Account security and cyber threats (Modules 26–74) 10 clues · Comparing wired and wireless networks, Wi-Fi range and interference, HTTPS and the padlock, Securing a Wi-Fi network and more
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Years 7–8 Digital Systems Word Search: Hardware for particular tasks to Account security and cyber threats (Modules 4–74) 20 words to find · CPU clock speed (GHz), CPU cores, HDD vs SSD performance, Storage units: KB, MB, GB, TB and more
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IGCSE Computer Science Paper 1 Crossword: 1.3 Data Storage and Compression and 2.1 Data Transmission Types and Methods (Modules 86–109) 10 clues · Why compression is needed: less storage space, Why compression is needed: less bandwidth, Why compression is needed: shorter transmission time, Lossy compression permanently removes data and more
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IGCSE Computer Science Paper 1 Crossword: 2.1 Data Transmission Types and Methods (Modules 110–120) 10 clues · The three parts of a packet, Packet header, Destination address in a packet header, Originator's address in a packet header and more
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IGCSE Computer Science Paper 1 Crossword: 2.1 Data Transmission Types and Methods (Modules 121–130) 10 clues · Why packets can take different routes, Packets arriving out of order, Reordering packets at the destination, Describing the packet switching process step by step and more
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IGCSE Computer Science Paper 1 Crossword: 2.1 Data Transmission Types and Methods and 2.2 Methods of Error Detection (Modules 142–154) 10 clues · Drawbacks of USB, Evaluating USB for a given use, Why data is checked after transmission, Interference as the cause of transmission errors and more
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IGCSE Computer Science Paper 1 Crossword: 2.2 Methods of Error Detection (Modules 155–164) 10 clues · Even parity, Odd parity, Working out the parity bit for a byte, Checking a received byte for a parity error and more
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IGCSE Computer Science Paper 1 Crossword: 2.2 Methods of Error Detection (Modules 168–178) 10 clues · Checksum, Calculating a checksum, Checking a checksum at the receiver, What a checksum can and cannot detect and more
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IGCSE Computer Science Paper 1 Crossword: 2.2 Methods of Error Detection (Modules 179–188) 10 clues · Bar code check digit, Checking a number with its check digit on entry, What a check digit cannot detect, Automatic repeat query (ARQ) and more
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IGCSE Computer Science Paper 1 Crossword: 3.3 Data Storage and 3.4 Network Hardware (Modules 325–341) 10 clues · Comparing cloud storage with local storage, Writing exam answers about data storage, What a MAC address is, MAC addresses are given at manufacture and more
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IGCSE Computer Science Paper 1 Crossword: 5.1 The Internet and the World Wide Web (Modules 464–476) 10 clues · URL part: the web page or file name, Splitting a URL into its parts, Purpose of HTTP, HTTP request and response and more
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IGCSE Computer Science Paper 1 Word Search: 1.3 Data Storage and Compression and 2.1 Data Transmission Types and Methods (Modules 86–120) 21 words to find · Why compression is needed: less storage space, Why compression is needed: less bandwidth, Why compression is needed: shorter transmission time, Lossy compression permanently removes data and more
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IGCSE Computer Science Paper 1 Word Search: 2.1 Data Transmission Types and Methods (Modules 121–141) 20 words to find · Why packets can take different routes, Packets arriving out of order, Reordering packets at the destination, Describing the packet switching process step by step and more
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IGCSE Computer Science Paper 1 Word Search: 2.1 Data Transmission Types and Methods and 2.2 Methods of Error Detection (Modules 142–164) 21 words to find · Drawbacks of USB, Evaluating USB for a given use, Why data is checked after transmission, Interference as the cause of transmission errors and more
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IGCSE Computer Science Paper 1 Word Search: 2.2 Methods of Error Detection (Modules 168–188) 21 words to find · Checksum, Calculating a checksum, Checking a checksum at the receiver, What a checksum can and cannot detect and more
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IGCSE Computer Science Paper 1 Word Search: 3.3 Data Storage and 3.4 Network Hardware (Modules 325–354) 20 words to find · Comparing cloud storage with local storage, Writing exam answers about data storage, What a MAC address is, MAC addresses are given at manufacture and more
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IGCSE Computer Science Paper 1 Word Search: 5.1 The Internet and the World Wide Web (Modules 464–489) 21 words to find · URL part: the web page or file name, Splitting a URL into its parts, Purpose of HTTP, HTTP request and response and more
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Crossword: Wired and Wireless Networks (Modules 54–68) 10 clues · Ethernet cable, Fibre optic cable, Signal weakening over distance in cables, Wi-Fi and more
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Crossword: Wired and Wireless Networks and Representing Text, Images and Sound (Modules 69–124) 10 clues · Wired vs wireless: mobility and convenience, Choosing a network type for a scenario, TCP/IP: the internet's core protocols, Redundant routes keep a network working and more
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Word Search: Hardware and Performance and Wired and Wireless Networks (Modules 13–68) 20 words to find · Clock speed or more cores: which helps which task, How much RAM different tasks need, Choosing storage type and size together, Video memory (VRAM) and more
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Word Search: Wired and Wireless Networks and Representing Text, Images and Sound (Modules 69–152) 21 words to find · Wired vs wireless: mobility and convenience, Choosing a network type for a scenario, TCP/IP: the internet's core protocols, Redundant routes keep a network working and more

Frequently Asked Questions

Are these worksheets free?

Yes — every worksheet and its answer key is free to view, download, and print, with no account required to access any individual module.

Do I need an account?

No account is needed to view or print a worksheet. A free teacher account adds extras like assigning modules to a class and tracking progress automatically — it takes under three minutes to set up and doesn't need a credit card.

What year level is this for?

This curriculum is aligned to the Australian Curriculum (ACARA) and Victorian Curriculum, spanning roughly Years 3 to 10 — from first sequencing and variables through to object-oriented programming and advanced data structures. Start wherever matches your class's current level; each module builds on the last.

Can I print them?

Yes — every module has a one-click Print Worksheet button that generates a printable page with the practice questions and a full answer key.

Is this aligned to a curriculum?

Yes — the module sequence is mapped to the Australian Curriculum (ACARA) and Victorian Curriculum, and a class's progress is reported back against those curriculum bands (e.g. ACARA Years 5–6 sequencing and iteration, Years 7–8 functions and data structures), not just a generic difficulty scale.

Can students use this without a teacher?

Yes — students can start any module and practice directly, no class or account required. Joining a teacher's class with a class code adds progress tracking, class badges, and live Sprints, but isn't needed to work through the worksheets or modules solo.

Do I need to know ACARA Digital Technologies Years 7–8 myself to teach this?

No — every module comes with a full worked answer key, and Cloodit tracks who's stuck automatically, so you don't need to solve each exercise yourself before assigning it or be able to debug a student's work line by line.

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