A network engineer is explaining to a junior technician how data is processed when a web server sends a response to a client. The engineer wants to illustrate the de-encapsulation process on the client. Which sequence correctly describes what happens at each layer of the TCP/IP model on the client?

Internet layer removes the IP header, network access layer removes the Ethernet header, transport layer removes the TCP header, application layer processes the HTTP data.

Transport layer removes the TCP header, internet layer removes the IP header, network access layer removes the Ethernet header, application layer processes the HTTP data.

Network access layer removes the Ethernet header, internet layer removes the IP header, transport layer removes the TCP header, application layer processes the HTTP data.

Application layer removes the HTTP header, transport layer removes the TCP header, internet layer removes the IP header, network access layer removes the Ethernet header.

A network administrator is configuring a new IoT device that uses IPv6 and needs to communicate with a server on the internet. The device also uses ICMPv6 for neighbor discovery. At which OSI layer does ICMPv6 operate?

Network layer, because ICMPv6 is used for error reporting and diagnostics within IP networks.

Application layer, because ICMPv6 is used by diagnostic tools like ping.

Data link layer, because ICMPv6 is used for MAC address resolution.

Transport layer, because ICMPv6 uses UDP for delivery.

EC-CouncilIoT Security Essentials

Domain 1Objective 3

OSI and TCP Models ISE Practice Questions (Page 1)

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 1–5

1foundation · easy
Which OSI layer is primarily responsible for translating data between the application format and a network-independent format, including encryption and compression?
Select an answer first
2application · medium
A network engineer is explaining to a junior technician how data is processed when a web server sends a response to a client. The engineer wants to illustrate the de-encapsulation process on the client. Which sequence correctly describes what happens at each layer of the TCP/IP model on the client?
Select an answer first
3application · easy
A network administrator is configuring a new IoT device that uses IPv6 and needs to communicate with a server on the internet. The device also uses ICMPv6 for neighbor discovery. At which OSI layer does ICMPv6 operate?
Select an answer first
4foundation · easy
In the TCP/IP model, which layer is responsible for routing packets across different networks using logical addressing such as IP addresses?
Select an answer first
5expert · hard
A security analyst is investigating a potential data exfiltration from an IoT device. The device sends data using MQTT over TLS. The analyst captures packets at the network layer and sees encrypted payloads. Which layer of the OSI model is the analyst NOT able to inspect?
Select an answer first

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OSI and TCP Models ISE Practice Questions (Page 1)

Questions 1–5

Which OSI layer is primarily responsible for translating data between the application format and a network-independent format, including encryption and compression?

A network engineer is explaining to a junior technician how data is processed when a web server sends a response to a client. The engineer wants to illustrate the de-encapsulation process on the client. Which sequence correctly describes what happens at each layer of the TCP/IP model on the client?

A network administrator is configuring a new IoT device that uses IPv6 and needs to communicate with a server on the internet. The device also uses ICMPv6 for neighbor discovery. At which OSI layer does ICMPv6 operate?

In the TCP/IP model, which layer is responsible for routing packets across different networks using logical addressing such as IP addresses?

A security analyst is investigating a potential data exfiltration from an IoT device. The device sends data using MQTT over TLS. The analyst captures packets at the network layer and sees encrypted payloads. Which layer of the OSI model is the analyst NOT able to inspect?

Keep studying — IoT Fundamentals and Networking