Wi-Fi standards and security in Intro to Computing - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does Wi-Fi stand for?

Wi-Fi stands for Wireless Fidelity. It is a technology that allows devices to connect to the internet or communicate wirelessly within a local area.

intermediate

Name two common Wi-Fi standards and their maximum speeds.

Two common Wi-Fi standards are:<br>• 802.11n: Up to 600 Mbps<br>• 802.11ac: Up to 1.3 Gbps<br>These standards define how fast and reliable the wireless connection can be.

beginner

What is WPA2 in Wi-Fi security?

WPA2 (Wi-Fi Protected Access 2) is a security protocol that protects Wi-Fi networks by encrypting data. It helps keep your wireless connection safe from unauthorized access.

beginner

Why is using a strong Wi-Fi password important?

A strong Wi-Fi password prevents unauthorized users from connecting to your network. It protects your personal data and stops others from using your internet without permission.

intermediate

What is the difference between 2.4 GHz and 5 GHz Wi-Fi bands?

The 2.4 GHz band covers a larger area but is slower and more prone to interference (like from microwaves). The 5 GHz band is faster and less crowded but covers a smaller area. Devices often choose based on distance and speed needs.

Which Wi-Fi security protocol is currently considered the most secure for home networks?

A Open (no password)

B WPA

C WEP

D WPA2

WPA2 is the most widely used and secure protocol for home Wi-Fi networks, providing strong encryption.

What is the main advantage of the 5 GHz Wi-Fi band over 2.4 GHz?

A Longer range

B Works with older devices only

C Faster speeds and less interference

D Uses less power

The 5 GHz band offers faster speeds and is less crowded, reducing interference compared to 2.4 GHz.

Which Wi-Fi standard introduced speeds up to 1.3 Gbps?

A 802.11ac

B 802.11g

C 802.11b

D 802.11n

802.11ac supports speeds up to 1.3 Gbps, much faster than previous standards.

What does a Wi-Fi router do?

A Connects devices to the internet wirelessly

B Stores files for devices

C Charges devices wirelessly

D Blocks all internet access

A Wi-Fi router sends and receives data wirelessly, connecting devices to the internet.

Why should you avoid using WEP security on your Wi-Fi network?

A It is too slow

B It is outdated and easily hacked

C It uses too much power

D It only works with 5 GHz band

WEP is an old security protocol that is weak and can be easily broken by attackers.

Explain the differences between Wi-Fi standards 802.11n and 802.11ac and how they affect your internet experience.

Think about how fast your videos load or how far you can be from the router.

Describe why Wi-Fi security is important and list common methods to protect a home Wi-Fi network.

Imagine leaving your front door unlocked versus locked.