Q31
Q31 How does the Zigbee protocol benefit IoT applications?
By providing high data transfer speeds
By ensuring interoperability among devices
By offering long-range connectivity
By enabling direct Internet access
Q32
Q32 Which feature makes 5G technology particularly beneficial for IoT deployments?
Increased data rates
Reduced latency
Enhanced security
All of the above
Q33
Q33 What role does the Constrained Application Protocol (CoAP) play in IoT?
It encrypts IoT communications
It standardizes web-based communication for constrained devices
It increases the range of Wi-Fi
It enhances Bluetooth connectivity
Q34
Q34 Which coding structure is commonly used with MQTT to minimize data packet size for IoT communications?
XML
JSON
Binary
HTML
Q35
Q35 For an IoT device using CoAP, what method is typically used to retrieve the current state of a resource?
GET
POST
PUT
DELETE
Q36
Q36 How is security typically added to MQTT messages in IoT applications?
Through SSL/TLS encryption
By using strong passwords
Through digital watermarks
By encrypting the payload with AES
Q37
Q37 In IoT, what advantage does using WebSockets over traditional HTTP polling provide for real-time data updates?
Lower power consumption
Continuous and faster data updates
Increased data security
Easier implementation
Q38
Q38 What mechanism does DTLS use to ensure message integrity and confidentiality in IoT communication?
Symmetric encryption
Asymmetric encryption
Both symmetric and asymmetric encryption
Digital signatures
Q39
Q39 An IoT device is unable to connect to the MQTT broker. What is the first thing to check?
The device's power source
The network connection
The broker's IP address
The encryption method used
Q40
Q40 IoT devices using BLE are experiencing intermittent disconnections. What could be causing this issue?
Low battery levels
Interference from other wireless devices
Insufficient bandwidth
Device is out of range
Q41
Q41 A group of IoT devices on a Zigbee network are not receiving updates. What is a likely reason?
The coordinator device is offline
The encryption keys are mismatched
The devices are out of range
Network congestion
Q42
Q42 What is a common issue to check when an IoT device fails to establish a secure connection over DTLS?
Incorrect certificates
Low device memory
Unsupported encryption algorithms
Firmware needs updating
Q43
Q43 In an IoT system where devices communicate over CoAP, some messages are not reaching their destination.
What could be the problem?
Network congestion
Device misconfiguration
Payload size exceeds the maximum allowed
Improper routing
Q44
Q44 What is the primary goal of implementing security measures in IoT devices?
To enhance device performance
To increase data storage capacity
To protect data and devices from unauthorized access
To reduce the cost of devices
Q45
Q45 Which of the following is a common threat to IoT security?
Device mobility
Data encryption
Phishing attacks
The use of open source software
Q46
Q46 In the context of IoT, what is "end-to-end encryption"?
Encrypting data only when stored on the device
Encrypting data in transit but not at rest
Encrypting data both in transit and at rest
Encrypting data only at the application layer
Q47
Q47 What role does authentication play in IoT security?
Verifying the integrity of data
Confirming a device's operational status
Ensuring only authorized devices can access the network
Increasing the speed of data transmission
Q48
Q48 Which of the following best describes the principle of "least privilege" in IoT security?
Giving devices unlimited access to network resources
Giving devices the minimum level of access necessary
Encrypting all device communications
Regularly updating device firmware
Q49
Q49 How does a Distributed Denial of Service (DDoS) attack affect IoT devices?
By decrypting data stored on devices
By overloading devices or networks with traffic
By physically damaging devices
By stealing user credentials
Q50
Q50 What is the significance of firmware updates in maintaining IoT security?
They increase the storage capacity of devices
They enhance the user interface
They fix security vulnerabilities and improve device functionality
They reduce power consumption
Q51
Q51 In IoT security, what is a "Zero Trust" model?
A model where devices are trusted based on their location in the network
A model where no device is trusted by default, and verification is required for access
A model focusing solely on external threats
A model based on trust levels assigned by device manufacturers
Q52
Q52 How do Public Key Infrastructures (PKI) enhance IoT security?
By providing a centralized database for device information
By enabling secure device-to-device communication through digital certificates
By increasing the data processing speed
By reducing power consumption in devices
Q53
Q53 Which cryptographic method is typically used to secure the exchange of keys for encrypted communication in IoT?
Symmetric encryption
Asymmetric encryption
Hash functions
MAC algorithms
Q54
Q54 In an IoT application, what is the purpose of implementing a Hardware Security Module (HSM)?
To physically protect the IoT device from damage
To manage digital keys and perform encryption and decryption
To increase the computational power
To monitor the network traffic
Q55
Q55 How does implementing rate limiting on IoT devices contribute to security?
By restricting the number of messages sent to a device, mitigating the risk of DDoS attacks
By encrypting all outgoing communications
By increasing the speed of data transmission
By automatically updating device firmware
Q56
Q56 What security feature should be implemented to ensure the integrity of data transmitted between IoT devices?
Digital signatures
Password protection
Firewalls
Antivirus software
Q57
Q57 What is the main advantage of using blockchain technology in IoT security?
Enabling anonymous device communication
Reducing the energy consumption of devices
Creating immutable records of transactions
Facilitating faster data transfer
Q58
Q58 If an IoT device is frequently losing its secure connection, what should be inspected first?
The strength of the Wi-Fi signal
The security protocol configuration
The device's battery level
The physical condition of the device
Q59
Q59 When an IoT device exhibits unexpected behavior, what security aspect should be examined as a potential cause?
The firmware version for known vulnerabilities
The physical access controls
The rate of data transmission
The device's operating temperature
Q60
Q60 In dealing with a compromised IoT device, what is a critical first step to mitigate further risk?
Disconnecting the device from the network
Performing a factory reset
Updating the device's firmware
Changing the device's Wi-Fi password
