Which basic security service protects against alteration of data while it is in transit?
- replay protection
- message confidentiality
- message integrity
- access control
Explanation: 802.15.4 operates at the OSI physical and data link layers. There are four basic security services performed at the data link layer:
- Access control - prevents unauthorized devices from joining the network
- Message integrity - protects against alteration of data while it is in transit
- Message confidentiality - prevents threat actors from reading the transmitted data
- Replay protection - prevents threat actors from successfully capturing legitimate messages and sending them out on the network at a later time
Exam with this question: IoT Security 1.1 Chapter 4 Quiz Answers
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