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Intro to Computingfundamentals~5 mins

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

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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.
Click to reveal answer
intermediate
Name two common Wi-Fi standards and their maximum speeds.
Two common Wi-Fi standards are:
• 802.11n: Up to 600 Mbps
• 802.11ac: Up to 1.3 Gbps
These standards define how fast and reliable the wireless connection can be.
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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.
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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.
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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.
Click to reveal answer
Which Wi-Fi security protocol is currently considered the most secure for home networks?
AOpen (no password)
BWPA
CWEP
DWPA2
What is the main advantage of the 5 GHz Wi-Fi band over 2.4 GHz?
ALonger range
BWorks with older devices only
CFaster speeds and less interference
DUses less power
Which Wi-Fi standard introduced speeds up to 1.3 Gbps?
A802.11ac
B802.11g
C802.11b
D802.11n
What does a Wi-Fi router do?
AConnects devices to the internet wirelessly
BStores files for devices
CCharges devices wirelessly
DBlocks all internet access
Why should you avoid using WEP security on your Wi-Fi network?
AIt is too slow
BIt is outdated and easily hacked
CIt uses too much power
DIt only works with 5 GHz band
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.
You got /3 concepts.
    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.
    You got /4 concepts.

      Practice

      (1/5)
      1. Which Wi-Fi standard is known for providing the fastest wireless speeds among the following?
      easy
      A. Wi-Fi 3 (802.11g)
      B. Wi-Fi 4 (802.11n)
      C. Wi-Fi 2 (802.11a)
      D. Wi-Fi 6 (802.11ax)

      Solution

      1. Step 1: Understand Wi-Fi standards and speeds

        Wi-Fi standards are named by numbers and letters; higher numbers usually mean faster speeds.

      2. Step 2: Compare listed standards

        Wi-Fi 6 (802.11ax) is the newest and fastest standard compared to Wi-Fi 4, 3, and 2.

      3. Final Answer:

        Wi-Fi 6 (802.11ax) -> Option D

      4. Quick Check:

        Latest Wi-Fi standard = Wi-Fi 6 [OK]
      Hint: Latest Wi-Fi number means fastest speed [OK]
      Common Mistakes:
      • Confusing older standards as faster
      • Mixing up Wi-Fi version numbers
      • Assuming Wi-Fi 5 is faster than Wi-Fi 6
      2. Which of the following is the correct way to specify WPA3 security in a Wi-Fi router settings?
      easy
      A. WPA3-Personal
      B. WPA2-PSK
      C. WEP
      D. Open Network

      Solution

      1. Step 1: Identify security types

        WPA3 is the latest Wi-Fi security standard, often called WPA3-Personal for home use.

      2. Step 2: Match correct naming

        WPA3-Personal is the correct term; WPA2-PSK is older, WEP is outdated, Open Network means no security.

      3. Final Answer:

        WPA3-Personal -> Option A

      4. Quick Check:

        Latest Wi-Fi security = WPA3-Personal [OK]
      Hint: WPA3-Personal is latest home Wi-Fi security name [OK]
      Common Mistakes:
      • Choosing WEP which is insecure
      • Confusing WPA2 with WPA3
      • Selecting Open Network which has no password
      3. Consider this scenario: A Wi-Fi router supports 802.11ac standard and uses WPA2 security. Which of the following is true about this setup?
      medium
      A. It supports moderate speeds and uses outdated security.
      B. It supports fast speeds but uses a secure, widely accepted security.
      C. It provides the fastest Wi-Fi speeds and the strongest security.
      D. It supports slow speeds and no security.

      Solution

      1. Step 1: Analyze Wi-Fi standard 802.11ac

        802.11ac (Wi-Fi 5) supports fast speeds but is not the latest standard.

      2. Step 2: Analyze WPA2 security

        WPA2 is still widely used and considered secure, though WPA3 is newer.

      3. Final Answer:

        It supports fast speeds but uses a secure, widely accepted security. -> Option B

      4. Quick Check:

        802.11ac + WPA2 = fast + secure [OK]
      Hint: 802.11ac = fast Wi-Fi; WPA2 = secure but not newest [OK]
      Common Mistakes:
      • Assuming WPA2 is outdated and insecure
      • Thinking 802.11ac is the latest Wi-Fi
      • Confusing speed with security level
      4. A user sets their Wi-Fi router to use WEP security but notices frequent unauthorized access. What is the main problem and how to fix it?
      medium
      A. Wi-Fi standard is slow; upgrade to 802.11ax.
      B. WEP is strong; change the Wi-Fi password frequently.
      C. WEP is outdated and weak; switch to WPA3 security.
      D. Router hardware is faulty; replace the router.

      Solution

      1. Step 1: Identify WEP security issues

        WEP is an old security type that is easily cracked by attackers.

      2. Step 2: Recommend a secure alternative

        Switching to WPA3 provides stronger protection against unauthorized access.

      3. Final Answer:

        WEP is outdated and weak; switch to WPA3 security. -> Option C

      4. Quick Check:

        WEP weak = unauthorized access; use WPA3 [OK]
      Hint: WEP is weak; always use WPA3 or WPA2 [OK]
      Common Mistakes:
      • Thinking changing password fixes WEP weakness
      • Blaming hardware instead of security type
      • Confusing Wi-Fi speed with security
      5. You want to set up a Wi-Fi network in a large office with many devices. Which combination of Wi-Fi standard and security is best to ensure fast speeds and strong protection?
      hard
      A. Wi-Fi 6 (802.11ax) with WPA3-Enterprise
      B. Wi-Fi 4 (802.11n) with WPA2-Personal
      C. Wi-Fi 5 (802.11ac) with WEP
      D. Wi-Fi 3 (802.11g) with Open Network

      Solution

      1. Step 1: Consider Wi-Fi standards for large office

        Wi-Fi 6 (802.11ax) supports many devices with fast speeds and better efficiency.

      2. Step 2: Choose security for enterprise environment

        WPA3-Enterprise offers strong security suitable for business networks.

      3. Final Answer:

        Wi-Fi 6 (802.11ax) with WPA3-Enterprise -> Option A

      4. Quick Check:

        Best speed + security for office = Wi-Fi 6 + WPA3-Enterprise [OK]
      Hint: Office Wi-Fi needs Wi-Fi 6 + WPA3-Enterprise [OK]
      Common Mistakes:
      • Choosing outdated Wi-Fi standards
      • Using weak security like WEP or open networks
      • Ignoring enterprise security needs