EC-CouncilIoT Security Essentials
Domain 1Objective 3
OSI and TCP Models ISE Practice Questions (Page 5)
Part of the IoT Fundamentals and Networking domain, which makes up ~15% of our current practice bank. EC-Council does not publish an official question count, but from its 120-minute exam (~50–80 total, ~8–12 in this domain), expect 2–3 from this objective — we provide 27 practice questions to prepare you well beyond it. (estimate)
27questions here
6free pages
6concepts
Questions 21–25
- 21
A smart meter sends usage data to a utility server using CoAP over UDP. A network administrator is troubleshooting why the data is not being delivered reliably. Which TCP/IP layer is responsible for the unreliable delivery characteristic of UDP?
Select an answer first - 22
During data encapsulation in the TCP/IP model, what happens to a data segment when it is passed from the transport layer to the Internet layer?
Select an answer first - 23
A network administrator is troubleshooting why a smart sensor cannot reach the internet. The sensor has a valid IP address, can ping its default gateway, but cannot resolve domain names. According to the TCP/IP model, which layer is most likely causing the problem?
Select an answer first - 24
A hospital deploys IoT infusion pumps that send patient data to a central monitoring system. The network team must ensure data confidentiality and integrity while minimizing latency. They are considering TLS at the transport layer versus application-layer encryption. Which approach best balances security and latency?
Select an answer first - 25
In comparing the OSI and TCP/IP models, which OSI layer maps directly to the TCP/IP Internet layer?
Select an answer first
Finished these 5 questions?
Review the revealed explanations, or continue through the curriculum.
Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by EC-Council. “ISE” is a trademark of its owner, used for identification only.