Q.1 Which of the following is a common security challenge in IoT devices?
Limited processing power
High battery life
Large memory storage
Low network latency
Explanation - IoT devices often have limited CPU, memory, and storage, making it difficult to implement complex security protocols.
Correct answer is: Limited processing power
Q.2 What does the term 'IoT Security' primarily refer to?
Protection of IoT devices and networks from cyber threats
Improving IoT device speed
Enhancing IoT device aesthetics
Increasing IoT battery life
Explanation - IoT Security involves protecting devices, networks, and data from unauthorized access and cyber attacks.
Correct answer is: Protection of IoT devices and networks from cyber threats
Q.3 Which protocol is widely used to secure IoT communications?
MQTT with TLS
HTTP without encryption
FTP
SMTP
Explanation - MQTT is a common IoT messaging protocol, and using TLS ensures encrypted communication between devices.
Correct answer is: MQTT with TLS
Q.4 Which of the following is a vulnerability commonly found in IoT devices?
Default passwords
Overclocked CPU
High-resolution display
Excessive storage
Explanation - Many IoT devices ship with default passwords, which are often never changed, making them vulnerable to attacks.
Correct answer is: Default passwords
Q.5 What is a primary method to prevent unauthorized access to IoT devices?
Strong authentication
Faster network speed
Increasing storage
Reducing device size
Explanation - Implementing strong passwords, multi-factor authentication, and certificates helps prevent unauthorized access.
Correct answer is: Strong authentication
Q.6 Which attack specifically targets IoT devices to create a large-scale disruption?
Botnet attack
Phishing
SQL Injection
Cross-site scripting
Explanation - IoT devices can be compromised and used as part of botnets to perform DDoS attacks and other malicious activities.
Correct answer is: Botnet attack
Q.7 What is the role of encryption in IoT security?
Protects data in transit and storage
Increases device battery life
Improves sensor accuracy
Reduces device weight
Explanation - Encryption ensures that sensitive data transmitted or stored by IoT devices remains confidential and secure.
Correct answer is: Protects data in transit and storage
Q.8 Which IoT security principle emphasizes limiting access based on user roles?
Access control
Data mining
Load balancing
Edge computing
Explanation - Access control restricts users to only the resources they are authorized to access, reducing the risk of unauthorized actions.
Correct answer is: Access control
Q.9 Firmware updates in IoT devices are important because:
They patch security vulnerabilities
They increase battery size
They enhance screen resolution
They improve Wi-Fi speed
Explanation - Regular firmware updates fix known security flaws and help prevent exploitation of IoT devices.
Correct answer is: They patch security vulnerabilities
Q.10 What is a 'zero-day' vulnerability in IoT devices?
A previously unknown security flaw exploited by attackers
A device that runs without power
A network with zero latency
A fully secure IoT device
Explanation - Zero-day vulnerabilities are flaws that are unknown to developers and can be exploited before a fix is available.
Correct answer is: A previously unknown security flaw exploited by attackers
Q.11 Which technology helps IoT devices securely exchange data over the internet?
TLS/SSL encryption
Plain HTTP
FTP without encryption
Telnet
Explanation - TLS and SSL provide secure communication channels, preventing data interception or tampering.
Correct answer is: TLS/SSL encryption
Q.12 Why is physical security important for IoT devices?
Preventing tampering or theft
Reducing battery consumption
Improving sensor accuracy
Enhancing signal strength
Explanation - Unauthorized physical access can compromise device integrity, data, and network security.
Correct answer is: Preventing tampering or theft
Q.13 Which type of IoT attack aims to overload a network by sending massive amounts of traffic?
DDoS attack
Man-in-the-middle attack
Brute-force attack
SQL injection
Explanation - Distributed Denial-of-Service (DDoS) attacks flood networks with traffic, making IoT services unavailable.
Correct answer is: DDoS attack
Q.14 Which IoT security approach involves monitoring device behavior to detect anomalies?
Behavioral analytics
Hardware acceleration
Data compression
Edge computing
Explanation - Behavioral analytics helps identify unusual activity in IoT devices, indicating potential security threats.
Correct answer is: Behavioral analytics
Q.15 What is the primary concern with IoT devices collecting personal data?
Privacy and data protection
Device color design
Battery size
Processor speed
Explanation - IoT devices can collect sensitive user information, so ensuring privacy and compliance with data protection laws is crucial.
Correct answer is: Privacy and data protection
Q.16 Which of the following is a lightweight cryptographic algorithm suitable for IoT devices?
AES-CCM
RSA-4096
SHA-512
Blowfish-448
Explanation - AES-CCM provides strong security with low computational overhead, making it suitable for resource-constrained IoT devices.
Correct answer is: AES-CCM
Q.17 Edge computing improves IoT security by:
Processing data locally, reducing exposure
Increasing cloud latency
Slowing device response
Reducing memory storage
Explanation - Edge computing processes sensitive data closer to devices, reducing transmission and potential exposure to attacks.
Correct answer is: Processing data locally, reducing exposure
Q.18 Which of the following best defines a 'man-in-the-middle' attack in IoT?
Intercepting and possibly altering communication between devices
Physically damaging IoT sensors
Upgrading firmware without consent
Changing network topology
Explanation - In a MITM attack, attackers secretly intercept and may modify communication between IoT devices or users.
Correct answer is: Intercepting and possibly altering communication between devices
Q.19 Why are IoT devices more prone to security risks compared to traditional computers?
Resource limitations and lack of standardization
Better graphics
Higher storage capacity
Faster processors
Explanation - IoT devices often have limited computational resources and inconsistent security implementations, making them vulnerable.
Correct answer is: Resource limitations and lack of standardization
Q.20 Which security measure can protect IoT devices from unauthorized firmware installation?
Secure boot
Overclocking
Load balancing
Data caching
Explanation - Secure boot ensures that only firmware signed and verified by trusted authorities can run on the device.
Correct answer is: Secure boot
Q.21 What is the main purpose of IoT device authentication?
Verify device identity before network access
Increase Wi-Fi speed
Reduce device size
Enhance battery performance
Explanation - Authentication ensures that only authorized IoT devices can access the network or cloud services.
Correct answer is: Verify device identity before network access
Q.22 Which layer of the IoT architecture is most vulnerable to cyber attacks?
Perception layer (sensors)
Application layer design
User interface color scheme
Device packaging material
Explanation - The perception layer, where sensors and actuators interact with the physical environment, is often most exposed to physical and cyber attacks.
Correct answer is: Perception layer (sensors)
Q.23 Which technique is commonly used to detect malware in IoT devices?
Intrusion detection systems
Increasing sensor size
Reducing network speed
Enhancing screen brightness
Explanation - IDS monitors device behavior and network traffic to detect malware and anomalous activity in IoT ecosystems.
Correct answer is: Intrusion detection systems
Q.24 What is 'OTA update' in the context of IoT security?
Over-the-air firmware/software update
One-time authentication
Offline temperature adjustment
Optimal throughput allocation
Explanation - OTA updates allow manufacturers to remotely patch devices, fixing vulnerabilities without physical access.
Correct answer is: Over-the-air firmware/software update
Q.25 Which of the following is a security benefit of network segmentation in IoT?
Limits spread of malware across devices
Increases battery life
Enhances device aesthetics
Reduces sensor accuracy
Explanation - Segmenting IoT networks isolates devices, preventing compromised devices from affecting the entire network.
Correct answer is: Limits spread of malware across devices