← Years 7–8 Digital Systems

Securing a Wi-Fi network

The newest Wi-Fi security standard. With a strong password it scrambles data in the air so outsiders can't read it. WPA2 is the older version. Open networks have no protection at all.

Part of: 7-8 Digital Technologies Vic Curric - Digital Systems and Security — Module 47, ACARA Digital Technologies Years 7–8 — Wired and Wireless Networks — Module 26, ACARA Digital Technologies Years 9–10 — Networked Systems and Access Control — Module 94, WA Computer Science ATAR Year 11 — Network Communications — Module 109, WA Computer Science ATAR Year 11 — Cyber Security — Module 98

Understanding Securing a Wi-Fi network in Years 7–8 Digital Systems

What it does: The default password such as admin is easy to guess. Swapping it for a strong, unique one keeps outsiders out of the router. WPA2 and WPA3 both encrypt data in the air. WPA3 is newer and stronger, so use it when the router supports it. An open network has no protection, so anyone nearby can join it and try to read the data. A secured network scrambles the data in the air. WPA3 is the newest standard. WPA2 is the older version, but it is still much safer than having no protection at all. WPA3 is the latest encryption standard for securing a Wi-Fi network, so it matches this meaning.

Common mistakes: A secured Wi-Fi network needs encryption turned on so data in the air is scrambled. The line should be encryption = True. An open network has no protection, so anyone nearby can read the data. The security should be a standard such as WPA3 (or WPA2).

Class: _____________________ · Name: _____________________ · Date: _________

Free printable worksheet with full answer key — or add this module to a class and your students practise it interactively.

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This module's key terms are also in a printable crossword (Modules 26–74) and word search (Modules 4–74).

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Learning

Duo

Which Wi-Fi network is safer to use at home?

An open network with no passwordA network secured with WPA3 and a strong password

Matches

Wi-Fi security: None (open network)

↓

No password or encryption is set, so anyone can join and read data. Fix: turn on WPA2 or WPA3 with a strong password.

Applying

Meanings

Term

WPA3

Meaning

The newest Wi-Fi security standard. With a strong password it scrambles data in the air so outsiders can't read it. WPA2 is the older version. Open networks have no protection at all.

Practice

Wi-Fi security: WPA3

Testing

Gaps

Security:

Check Answer

Spots

2password = "Blue!Sails42"

3encryption = False

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Quick Questions

1. Which Wi-Fi network is safer to use at home?

A. A network secured with WPA3 and a strong password ✓

B. An open network with no password

An open network has no protection, so anyone nearby can join it and try to read the data. A secured network scrambles the data in the air.

2. What does WPA2 or WPA3 do to the data sent through the air?

A. It makes the data travel faster through the walls

B. It scrambles the data (encryption) so outsiders can't read it ✓

WPA2 and WPA3 are about security, not speed. They encrypt the data so anyone who intercepts it just sees scrambled nonsense.

3. Which is the newest Wi-Fi security standard?

A. WPA2

B. WPA3 ✓

WPA3 is the newest standard. WPA2 is the older version, but it is still much safer than having no protection at all.

4. You just plugged in a new router. The default password is printed on its label. What should you do?

A. Change the default router password to a strong, unique one ✓

B. Leave it, because the manufacturer's password is already the safest

Default passwords are often easy to guess or are shared across many routers of the same model. Changing it makes it much harder for attackers to get in.

5. Which Wi-Fi password is the better choice?

A. Three random words and some numbers, like purple-koala-bike-72 ✓

B. 12345678

Encryption is only as strong as the password behind it. A long, random passphrase is hard to guess, but 12345678 is one of the first things an attacker will try.

Match the Pairs

WPA3 → The newest Wi-Fi security standard, which scrambles data in the air so outsiders cannot read it

Open network (no password) → A Wi-Fi network with no protection, so anyone nearby can join and data may be read

Changing the default router password stops strangers from logging in to your router settings with a well-known password → Router admin password: admin -> Tr4in!Lamp#Hill92

Choose the strongest security setting on your router: WPA3 if available, otherwise WPA2 → Wi-Fi security: WPA3 (or WPA2)

Wi-Fi security: None (open network) → No password or encryption is set, so anyone can join and read data. Fix: turn on WPA2 or WPA3 with a strong password.

Router admin password: admin (unchanged) → The default password is public knowledge and easy to guess. Fix: change it to a strong, unique password.

Key Term

WPA3

The newest Wi-Fi security standard. With a strong password it scrambles data in the air so outsiders can't read it. WPA2 is the older version. Open networks have no protection at all.

Fill in the Blanks

1. Network: HomeWiFi Security: WPA3 Password: strong

Hint: Type the name of the newest Wi-Fi security standard.

2. Network: CafeFree Security: Open Password: none

Hint: Type the word for a network with no protection at all.

3. Router admin login: Change the default password Use a strong, unique one

Hint: Type the word for the factory-set router password that should be changed.

4. Network: GranHouse Security: WPA2 Status: older but still secure

Hint: Type the name of the older standard that came before the newest one.

5. Wi-Fi encryption scrambles data in the air

Hint: Type the word for scrambling data so outsiders cannot read it.

Spot the Error

Question 1

A name = "HomeWiFi"

B password = "Blue!Sails42"

C encryption = False

Line C — A secured Wi-Fi network needs encryption turned on so data in the air is scrambled. The line should be encryption = True.

Question 2

A security = "OPEN"

B password = "Blue!Sails42"

C save_settings()

Line A — An open network has no protection, so anyone nearby can read the data. The security should be a standard such as WPA3 (or WPA2).

Question 3

A if security == "OPEN":

B warn("No protection")

C else:

D print("Data is readable")

Line D — On a secured network (WPA2 or WPA3) the data is scrambled so outsiders cannot read it. The message should say the data is scrambled.

Question 4

A network = "HomeWiFi"

B security = "WPA2"

C password = "Mango#Wave2025"

D secure = security == "OPEN"

Line D — A network is only secure when it is NOT open. The test should use != so WPA2 counts as secure, not ==.

Question 5

A supports_wpa3 = True

B if supports_wpa3:

C security = "OPEN"

D else:

E security = "WPA2"

Line C — If the router supports WPA3, use it because it is the newest and safest standard. Setting it to OPEN would remove all protection.

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