WiFi vs other protocols decision matrix in IOT Protocols - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to select the protocol with the highest data rate.

IOT Protocols

best_protocol = max(protocols, key=lambda p: p['[1]'])

Drag options to blanks, or click blank then click option'

Adata_rate

Bpower_consumption

Crange

Dlatency

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'range' or 'power_consumption' instead of 'data_rate'.

We use 'data_rate' to find the protocol with the highest speed.

2fill in blank

medium

Complete the code to filter protocols with low power consumption.

IOT Protocols

low_power_protocols = [p for p in protocols if p['power_consumption'] [1] 50]

Drag options to blanks, or click blank then click option'

A>

B>=

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' which selects high power consumption protocols.

We want protocols with power consumption less than or equal to 50 units.

3fill in blank

hard

Fix the error in the code to correctly calculate average latency.

IOT Protocols

average_latency = sum(p['latency'] for p in protocols) [1] len(protocols)

Drag options to blanks, or click blank then click option'

A/

B-

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using '*' or '+' instead of '/'.

Average is total latency divided by number of protocols.

4fill in blank

hard

Fill both blanks to create a dictionary of protocols with latency less than 100ms.

IOT Protocols

fast_protocols = {p['[1]']: p['[2]'] for p in protocols if p['latency'] < 100}

Drag options to blanks, or click blank then click option'

Aname

Bdata_rate

Cpower_consumption

Drange

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'power_consumption' or 'range' as keys or values incorrectly.

Keys are protocol names and values are their data rates.

5fill in blank

hard

Fill all three blanks to create a filtered dictionary of protocols with range over 100m and power consumption under 60.

IOT Protocols

selected_protocols = {p['[1]']: p['[2]'] for p in protocols if p['range'] [3] 100 and p['power_consumption'] < 60}

Drag options to blanks, or click blank then click option'

Aname

Bdata_rate

C>

Dlatency

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong keys or values, or wrong comparison operator.

We select protocols by name as keys, data rate as values, and filter by range greater than 100 meters.

Practice

1. Which protocol is best suited for high-speed data transfer within a home or office environment?

easy

A. Bluetooth

B. LoRa

C. WiFi

D. Zigbee

Solution

1. Step 1: Understand protocol speed and range

   WiFi offers high-speed data transfer but works best within short to medium range like homes or offices.

2. Step 2: Compare with other protocols

   LoRa is for long range but low data, Bluetooth and Zigbee are low power and short range but slower than WiFi.

3. Final Answer:

   WiFi -> Option C

4. Quick Check:

   High speed + short range = WiFi [OK]

Hint: High speed and short range? Pick WiFi [OK]

Common Mistakes:

• Choosing LoRa for high speed
• Confusing Bluetooth with WiFi speed
• Selecting Zigbee for fast data

2. Which of the following is the correct characteristic of LoRa in IoT?

easy

A. Low power consumption and long range

B. Low data rate and short range

C. High data rate and short range

D. High power consumption and short range

Solution

1. Step 1: Recall LoRa features

   LoRa is designed for low power consumption and long-range communication in IoT.

2. Step 2: Eliminate incorrect options

   High power or short range do not match LoRa's purpose; low data rate is true but range is long, not short.

3. Final Answer:

   Low power consumption and long range -> Option A

4. Quick Check:

   LoRa = low power + long range [OK]

Hint: LoRa means long range and low power [OK]

Common Mistakes:

• Mixing up power consumption levels
• Confusing LoRa with Bluetooth range
• Assuming LoRa has high data rate

3. Given a device that needs to send small data packets over a short distance with minimal power use, which protocol will likely produce the best battery life?

medium

A. Bluetooth

B. LoRa

C. WiFi

D. Ethernet

Solution

1. Step 1: Analyze power and range needs

   Small data and short distance with minimal power points to Bluetooth or Zigbee, but Zigbee is not an option here.

2. Step 2: Compare protocols

   WiFi uses more power, LoRa is for long range, Ethernet is wired and not wireless.

3. Final Answer:

   Bluetooth -> Option A

4. Quick Check:

   Short range + low power = Bluetooth [OK]

Hint: Short range + low power = Bluetooth [OK]

Common Mistakes:

• Choosing WiFi for low power needs
• Selecting LoRa for short range
• Confusing Ethernet as wireless

4. A developer tries to use WiFi for a sensor device located 5 kilometers away from the router. The device keeps losing connection. What is the most likely cause?

medium

A. WiFi uses too little power for long distances

B. WiFi has limited range and cannot cover 5 km reliably

C. WiFi is not compatible with sensor devices

D. WiFi requires Ethernet cables for long distance

Solution

1. Step 1: Understand WiFi range limits

   WiFi typically covers up to 100 meters indoors and a few hundred meters outdoors, not 5 km.

2. Step 2: Identify cause of connection loss

   The distance is too far for WiFi signals to maintain stable connection, causing drops.

3. Final Answer:

   WiFi has limited range and cannot cover 5 km reliably -> Option B

4. Quick Check:

   WiFi range < 5 km causes connection loss [OK]

Hint: WiFi range is short, not kilometers [OK]

Common Mistakes:

• Blaming power level instead of range
• Thinking WiFi needs cables for distance
• Assuming WiFi is incompatible with sensors

5. You need to design an IoT system for a smart farm spread over 10 square kilometers. Devices send small data packets infrequently and must run on batteries for months. Which protocol is the best choice?

hard

A. WiFi

B. Zigbee

C. Bluetooth

D. LoRa

Solution

1. Step 1: Analyze system requirements

   Large area (10 sq km), small data, infrequent sending, and long battery life require long range and low power.

2. Step 2: Match protocols to needs

   WiFi and Bluetooth have short range; Zigbee is short range and low power but not ideal for very large areas; LoRa supports long range and low power.

3. Final Answer:

   LoRa -> Option D

4. Quick Check:

   Long range + low power + large area = LoRa [OK]

Hint: Long range + low power + big area = LoRa [OK]

Common Mistakes:

• Choosing WiFi for large area
• Confusing Zigbee range with LoRa
• Ignoring battery life needs