Wi-Fi and network connections in Intro to Computing - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding Wi-Fi Signal Strength

Imagine you are in a coffee shop using Wi-Fi. The signal strength indicator shows 3 out of 5 bars. What does this mean about your connection?

A The Wi-Fi signal is weak and the connection will be slow or unstable.

B The Wi-Fi signal is off, so you are not connected to the network.

C The Wi-Fi signal is very strong, so the connection will be very fast.

D The Wi-Fi signal is moderate, so the connection speed is average and mostly stable.

💡 Hint

Think about how signal bars represent strength from low to high.

Wi-Fi signal bars show strength from low (few bars) to high (all bars). Three bars mean moderate strength, so connection speed and stability are average.

❓ trace

intermediate

Tracing IP Address Assignment

When a device connects to a Wi-Fi network, it gets an IP address automatically. Which device in the network usually assigns this IP address?

A The internet service provider assigns the IP address directly to the device.

B The Wi-Fi router using DHCP (Dynamic Host Configuration Protocol).

C The Wi-Fi signal strength determines the IP address.

D The device itself randomly chooses an IP address.

💡 Hint

Think about which device manages the local network and gives addresses to devices.

The Wi-Fi router uses DHCP to assign IP addresses automatically to devices joining the network, so they can communicate properly.

❓ identification

advanced

Identifying Network Types from Descriptions

Which type of network is described here: "A network that covers a small area like a home or office, usually using Wi-Fi or Ethernet cables"?

A Metropolitan Area Network (MAN)

B Wide Area Network (WAN)

C Local Area Network (LAN)

D Personal Area Network (PAN)

💡 Hint

Think about the size and typical use of the network described.

A Local Area Network (LAN) covers a small area like a home or office and connects devices via Wi-Fi or cables.

❓ Comparison

advanced

Comparing Wi-Fi Frequency Bands

Which statement correctly compares the 2.4 GHz and 5 GHz Wi-Fi frequency bands?

A 2.4 GHz has longer range but slower speed; 5 GHz has shorter range but faster speed.

B 2.4 GHz has shorter range and faster speed; 5 GHz has longer range and slower speed.

C 5 GHz is used only for wired connections, not Wi-Fi.

D Both 2.4 GHz and 5 GHz have the same range and speed.

💡 Hint

Think about how frequency affects signal travel and speed.

2.4 GHz Wi-Fi travels farther but is slower; 5 GHz Wi-Fi is faster but covers a smaller area.

🚀 Application

expert

Diagnosing Network Connection Issues

You are connected to a Wi-Fi network but cannot access the internet. Which of the following is the most likely cause?

A The device has a valid IP address but the router has no internet connection.

B The Wi-Fi signal strength is full bars, so the internet must be working.

C The device is connected to the wrong Wi-Fi network with internet access.

D The device's screen brightness is too low, causing internet issues.

💡 Hint

Think about what happens if the local network is fine but the internet is down.

If the device has an IP address and Wi-Fi connection but no internet, the router likely lacks internet access from the provider.