Protocol selection criteria (bandwidth, power, latency) in IOT Protocols - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to select a protocol based on {{BLANK_1}} requirements.

IOT Protocols

if device_power < 10:
    protocol = '[1]'
else:
    protocol = 'WiFi'

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

ABluetooth Low Energy

BEthernet

CWiFi

DZigbee

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing WiFi for low power devices, which consumes more power.

Bluetooth Low Energy is chosen for low power devices.

2fill in blank

medium

Complete the code to select a protocol based on {{BLANK_1}} needs.

IOT Protocols

if required_bandwidth > 1000:
    protocol = '[1]'
else:
    protocol = 'LoRaWAN'

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

AZigbee

BBluetooth Low Energy

CNFC

DWiFi

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing Zigbee or BLE which have lower bandwidth.

WiFi supports high bandwidth suitable for large data transfer.

3fill in blank

hard

Fix the error in selecting a protocol for low {{BLANK_1}}.

IOT Protocols

if latency > 100:
    protocol = 'LoRaWAN'
else:
    protocol = '[1]'

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

AZigbee

BBluetooth Low Energy

CEthernet

DWiFi

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing LoRaWAN or Zigbee which have higher latency.

Ethernet provides low latency suitable for real-time applications.

4fill in blank

hard

Fill both blanks to select a protocol based on power and bandwidth.

IOT Protocols

if device_power < 5 and bandwidth < 250:
    protocol = '[1]'
else:
    protocol = '[2]'

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

AZigbee

BWiFi

CBluetooth Low Energy

DEthernet

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up protocols for power and bandwidth requirements.

Zigbee is good for low power and low bandwidth; WiFi is for higher bandwidth needs.

5fill in blank

hard

Fill all three blanks to create a dictionary mapping criteria to protocols.

IOT Protocols

protocol_map = {
    'low_power': '[1]',
    'high_bandwidth': '[2]',
    'low_latency': '[3]'
}

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

ABluetooth Low Energy

BWiFi

CEthernet

DLoRaWAN

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning LoRaWAN incorrectly to high bandwidth or low latency.

Bluetooth Low Energy is for low power, WiFi for high bandwidth, Ethernet for low latency.

Practice

1. Which factor is most important when choosing a protocol for a device that must run on a small battery for months without recharging?

easy

A. Strong encryption

B. High bandwidth

C. Low latency

D. Low power consumption

Solution

1. Step 1: Understand the device's main need

   The device must run for months on a small battery, so saving power is critical.

2. Step 2: Match protocol criteria to the need

   Low power consumption protocols help extend battery life, making them the best choice.

3. Final Answer:

   Low power consumption -> Option D

4. Quick Check:

   Battery life needs low power [OK]

Hint: Battery life? Pick low power protocols [OK]

Common Mistakes:

• Choosing high bandwidth which drains battery fast
• Confusing low latency with power saving
• Ignoring power needs for battery devices

2. Which protocol characteristic best fits a real-time alarm system that must alert instantly?

easy

A. Low power

B. High bandwidth

C. Low latency

D. High security

Solution

1. Step 1: Identify the system requirement

   A real-time alarm system needs to send alerts instantly without delay.

2. Step 2: Select the protocol feature that supports instant alerts

   Low latency means minimal delay, ideal for quick alert delivery.

3. Final Answer:

   Low latency -> Option C

4. Quick Check:

   Instant alerts need low latency [OK]

Hint: Instant alerts? Choose low latency [OK]

Common Mistakes:

• Picking high bandwidth which is not critical here
• Choosing low power which may delay alerts
• Confusing security with speed

3. A sensor network uses a protocol with 250 kbps bandwidth, low power, and moderate latency. Which application fits best?

medium

A. Streaming HD video

B. Periodic temperature updates

C. Real-time gaming

D. Large file transfers

Solution

1. Step 1: Analyze protocol features

   250 kbps bandwidth is low, power is low, latency is moderate.

2. Step 2: Match features to application needs

   Periodic temperature updates need low power and low bandwidth, moderate latency is acceptable.

3. Final Answer:

   Periodic temperature updates -> Option B

4. Quick Check:

   Low bandwidth suits small periodic data [OK]

Hint: Low bandwidth + low power = small periodic data [OK]

Common Mistakes:

• Choosing streaming video needing high bandwidth
• Picking real-time gaming needing low latency
• Selecting large file transfers needing high bandwidth

4. You selected a protocol with high bandwidth but the device battery drains quickly. What is the likely cause?

medium

A. Protocol uses too much power due to high bandwidth

B. Latency is too low causing overload

C. Device hardware is incompatible

D. Encryption slows down data transfer

Solution

1. Step 1: Understand the problem

   High bandwidth protocols often consume more power, draining battery faster.

2. Step 2: Identify cause of battery drain

   The high bandwidth causes increased power use, leading to quick battery drain.

3. Final Answer:

   Protocol uses too much power due to high bandwidth -> Option A

4. Quick Check:

   High bandwidth = more power use [OK]

Hint: High bandwidth often means high power use [OK]

Common Mistakes:

• Blaming low latency which doesn't cause power drain
• Assuming hardware incompatibility without evidence
• Confusing encryption impact with power consumption

5. A smart city project needs to monitor thousands of sensors sending small data packets infrequently. Which protocol selection is best considering bandwidth, power, and latency?

hard

A. Low bandwidth, low power, moderate latency

B. High bandwidth, low power, high latency

C. High bandwidth, high power, low latency

D. Low bandwidth, high power, low latency

Solution

1. Step 1: Analyze project needs

   Thousands of sensors send small data infrequently, so bandwidth and power must be low to save resources.

2. Step 2: Consider latency tolerance

   Moderate latency is acceptable since data is not urgent real-time.

3. Step 3: Match protocol features

   Low bandwidth and low power with moderate latency fits best for this use case.

4. Final Answer:

   Low bandwidth, low power, moderate latency -> Option A

5. Quick Check:

   Small infrequent data needs low bandwidth and power [OK]

Hint: Small, infrequent data? Pick low bandwidth & power [OK]

Common Mistakes:

• Choosing high bandwidth wasting resources
• Selecting high power draining batteries quickly
• Expecting low latency for non-urgent data