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Intro to Computingfundamentals~10 mins

LAN vs WAN in Intro to Computing - Draw & Compare

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Draw This - beginner

Draw a labeled diagram that shows the difference between a LAN (Local Area Network) and a WAN (Wide Area Network). Include at least three devices connected in a LAN and show how multiple LANs connect to form a WAN.

10 minutes
Hint 1
Hint 2
Hint 3
Grading Criteria
Diagram includes at least three devices connected in each LAN
Switch symbol shown connecting devices inside each LAN
Router symbol shown connecting multiple LANs
Clear labels for LAN, WAN, devices, switch, and router
Connections between devices and network devices are shown with lines
Explanation matches the diagram and correctly describes LAN and WAN
Solution
          +-------------------+          +-------------------+
          |      LAN 1        |          |      LAN 2        |
          |  +---+  +---+  +---+ |          |  +---+  +---+  +---+ |
          |  |PC1|--|PC2|--|PC5| |          |  |PC3|--|PC4|--|PC6| |
          |  +---+  +---+  +---+ |          |  +---+  +---+  +---+ |
          |       |       |      |          |       |       |      |
          |     +---+     |      |          |     +---+     |      |
          |     |Switch|--+      |          |     |Switch|--+      |
          |     +---+            |          |     +---+            |
          +--------|------------+          +--------|------------+
                   |                               |
                   |                               |
                   +---------------+---------------+
                                   |
                              +---------+
                              |  Router |
                              +---------+
                                   |
                              Internet


Explanation:
- Each LAN shows devices (PCs) connected to a switch.
- Switch connects devices inside the LAN.
- Routers connect multiple LANs to form a WAN.
- The WAN covers a large area by linking LANs through the internet or other wide networks.

This diagram shows two Local Area Networks (LANs), each with three devices connected to a switch. The switch helps devices inside the LAN communicate quickly and directly, like computers in the same office or home.

The two LANs are connected by a router, which links them over a Wide Area Network (WAN). The WAN covers a much larger area, such as different buildings, cities, or countries. The internet is an example of a WAN connecting many LANs worldwide.

Think of LAN as a small neighborhood where houses (devices) are close and connected by local roads (switch). WAN is like highways connecting different neighborhoods (LANs) far apart.

Variations - 2 Challenges
[intermediate] Draw a diagram showing a LAN with wireless devices and explain how wireless LAN differs from wired LAN.
[advanced] Draw a detailed diagram showing how multiple LANs connect through routers and switches to form a WAN, including the internet cloud symbol.

Practice

(1/5)
1. Which of the following best describes a Local Area Network (LAN)?
easy
A. A network that only connects mobile phones
B. A network connecting devices within a small area like a home or office
C. A network connecting devices across different countries
D. A network used exclusively for internet access

Solution

  1. Step 1: Understand the size of LAN

    A LAN connects devices that are physically close, such as in a home or office building.

  2. Step 2: Compare with WAN

    WAN connects devices over large distances like cities or countries, so it is not LAN.

  3. Final Answer:

    A network connecting devices within a small area like a home or office -> Option B

  4. Quick Check:

    LAN = Small area network [OK]
Hint: LAN is local, WAN is wide area [OK]
Common Mistakes:
  • Confusing LAN with WAN size
  • Thinking LAN connects devices worldwide
  • Assuming LAN only connects phones
2. Which of these is the correct statement about WAN?
easy
A. WAN connects devices over large geographical areas like cities or countries
B. WAN connects devices only within a single building
C. WAN is faster than LAN in all cases
D. WAN is used only for connecting printers

Solution

  1. Step 1: Identify WAN's geographical scope

    WAN connects devices over large distances such as cities, countries, or even continents.

  2. Step 2: Eliminate incorrect options

    WAN is not limited to a single building, not always faster than LAN, and not only for printers.

  3. Final Answer:

    WAN connects devices over large geographical areas like cities or countries -> Option A

  4. Quick Check:

    WAN = Wide area network [OK]
Hint: WAN covers wide areas beyond buildings [OK]
Common Mistakes:
  • Thinking WAN is limited to one building
  • Assuming WAN is always faster than LAN
  • Believing WAN connects only specific devices
3. Consider this scenario: A company has offices in New York and London. They want to connect their computers so employees can share files. Which network type will they most likely use?
medium
A. LAN
B. VPN (Virtual Private Network)
C. PAN (Personal Area Network)
D. WAN

Solution

  1. Step 1: Analyze the distance between offices

    New York and London are cities far apart, so a local network (LAN) is not enough.

  2. Step 2: Identify suitable network type

    WAN connects devices over large distances like cities or countries, so it fits this case.

  3. Final Answer:

    WAN -> Option D

  4. Quick Check:

    Connecting distant offices = WAN [OK]
Hint: Far apart offices use WAN [OK]
Common Mistakes:
  • Choosing LAN for distant locations
  • Confusing VPN as a network type here
  • Selecting PAN which is for personal devices
4. A student wrote: "WAN is always faster than LAN because it uses better technology." Identify the error in this statement.
medium
A. WAN speed depends on distance and technology, not always faster
B. WAN is always slower than LAN
C. LAN cannot connect multiple devices
D. WAN is only for wireless connections

Solution

  1. Step 1: Understand speed factors

    WAN speed varies with distance and technology; it is not always faster than LAN.

  2. Step 2: Correct the misconception

    LAN often has higher speed within small areas; WAN can be slower due to long distances.

  3. Final Answer:

    WAN speed depends on distance and technology, not always faster -> Option A

  4. Quick Check:

    WAN speed varies, not always faster [OK]
Hint: WAN speed varies; not always faster than LAN [OK]
Common Mistakes:
  • Assuming WAN is always faster
  • Thinking LAN cannot connect many devices
  • Believing WAN is only wireless
5. A company wants to set up a network that connects all devices inside their office building and also securely link to their branch office in another city. Which combination of networks should they use?
hard
A. Use WAN for both the office and branch office
B. Use LAN only for both locations
C. Use LAN for the office and WAN to connect to the branch office
D. Use PAN for the office and LAN for the branch office

Solution

  1. Step 1: Identify network for local office

    Devices inside one building connect via LAN because it covers small areas efficiently.

  2. Step 2: Identify network for branch office connection

    To connect offices in different cities, WAN is needed as it covers large distances.

  3. Step 3: Combine networks for full solution

    Use LAN inside each office and WAN to link offices securely over distance.

  4. Final Answer:

    Use LAN for the office and WAN to connect to the branch office -> Option C

  5. Quick Check:

    Local = LAN, distant = WAN [OK]
Hint: LAN local, WAN distant connections combined [OK]
Common Mistakes:
  • Using WAN inside a single building
  • Trying to use LAN across cities
  • Confusing PAN with office networks