Eccouncil 112-51 Exam Actual Questions

Name: Network Defense Essentials Exam
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The questions for 112-51 were last updated on Sep 29, 2024.

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Question No. 1

Which of the following layers of loT architecture employs protocols and networks for connecting, sending, and receiving data between devices and network?

ADevice layer

BCloud layer

CCommunication layer

DProcess layer

Show Answer

Correct Answer: C

The communication layer of IoT architecture employs protocols and networks for connecting, sending, and receiving data between devices and network. The communication layer is responsible for enabling data exchange among the IoT devices and the cloud or other devices. The communication layer can use various types of networks, such as wired, wireless, cellular, or satellite, and various types of protocols, such as TCP/IP, MQTT, CoAP, or ZigBee12. Reference: Network Defense Essentials - EC-Council Learning, IoT Architecture: The 4 Layers of an IoT System

Question No. 2

A major fire broke out in the storeroom of CyberSol Inc. It first gutted the equipment in the storeroom and then started spreading to other areas in the company. The officials of the company informed the fire department. The fire rescue team reached the premises and used a distribution piping system to suppress the fire, thereby preventing any human or asset loss.

Identify the type of fire-fighting system used by the rescue team in the above scenario.

AWet chemical suppressant

BSprinkler system

CFire extinguisher

DStandpipe system

Show Answer

Correct Answer: B

A sprinkler system is a type of fire-fighting system that uses a distribution piping system to suppress the fire. A sprinkler system consists of sprinkler heads that are connected to a water supply and activated by heat or smoke detectors. When a fire is detected, the sprinkler heads release water to extinguish the fire and prevent it from spreading. A sprinkler system can be wet, dry, pre-action, or deluge, depending on the type of water supply and activation mechanism12. Reference: Network Defense Essentials - EC-Council Learning, Essentials Of Fire Fighting, 7th Edition, Product Suite - IFSTA

Question No. 3

Which of the following types of network segmentation is an easy approach to divide a network but can be expensive as it occupies more space?

AVLAN segmentation

BLogical segmentation

CNetwork virtualization

DPhysical segmentation

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Correct Answer: D

Question No. 4

An loT sensor in an organization generated an emergency alarm indicating a security breach. The servers hosted in an loT layer accepted, stored, and processed the sensor data received from loT gateways and created dashboards for monitoring, analyzing, and implementing proactive decisions to tackle the issue.

Which of the following layers in the loT architecture performed the above activities after receiving an alert from the loT sensor?

ADevice layer

BCloud layer

CProcess layer

DCommunication Layer

Show Answer

Correct Answer: B

The cloud layer of IoT architecture is the layer that hosts the servers that accept, store, and process the sensor data received from IoT gateways. The cloud layer also creates dashboards for monitoring, analyzing, and implementing proactive decisions to tackle the issue. The cloud layer provides scalability, reliability, and security for the IoT system. The cloud layer can use various cloud computing models, such as public, private, hybrid, or community clouds12. Reference: Network Defense Essentials - EC-Council Learning, IoT Architecture: The 4 Layers of an IoT System

Question No. 5

John is working as a network administrator in an MNC company. He was instructed to connect all the remote offices with the corporate office but at the same time deny communication between the remote offices. In this process, he configured a central hub at the corporate head office, through which all branch offices can communicate.

Identify the type of VPN topology implemented by John in the above scenario.

AStar topology

BHub-and-spoke topology

CPoint-to-point topology

DMesh topology

Show Answer

Correct Answer: B

A hub-and-spoke topology is a type of VPN topology that connects multiple remote offices to a central hub, usually the corporate head office, through VPN tunnels. The hub acts as a gateway for the remote offices to access the corporate network resources. However, the remote offices cannot communicate with each other directly, and have to go through the hub. This topology reduces the number of VPN tunnels required, but also increases the load and latency on the hub. In the scenario, John configured a central hub at the corporate head office, through which all branch offices can communicate, but denied communication between the remote offices. Therefore, the type of VPN topology implemented by John is hub-and-spoke12. Reference: Network Defense Essentials - EC-Council Learning, Network Design Scenario #3: Remote Access VPN Design - Network Defense Blog

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