Eccouncil 112-51 Network Defense Essentials Exam NDE Exam Practice Test

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Total 75 questions
Question 1

John is working as a security professional in FinCorp Ltd. He was instructed to deploy a security solution on their corporate network that provides real-time monitoring, correlation of events, threat detection, and security incident response activities.

Which of the following security solutions helps John in the above scenario?



Answer : A

SIEM stands for Security Information and Event Management. It is a security solution that collects, analyzes, and correlates data from various sources, such as logs, network devices, applications, and security tools. SIEM provides real-time monitoring, threat detection, and security incident response activities. SIEM can help security professionals identify and mitigate security risks, comply with regulations, and improve the overall security posture of the organization12. Reference: Network Defense Essentials - EC-Council Learning, What is SIEM? Security Information and Event Management Explained


Question 2

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?



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 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?



Answer : D


Question 4

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.



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 5

Johana was working on a confidential project on her laptop. After working for long hours, she wanted to have a coffee break. Johana left the system active with the project file open and went for a coffee break. Soon after Johana left the place, Bob accessed Johana's system and modified the project file.

Which of the following security guidelines did Johana fail to comply with?



Answer : A

One of the most basic and important security guidelines for laptop users is to always log off or lock the system when unattended. This prevents unauthorized access to the system and the data stored on it by anyone who might have physical access to the laptop. Logging off or locking the system requires a password or other authentication method to resume the session, which adds a layer of protection to the laptop. Johana failed to comply with this security guideline, as she left the system active with the project file open and went for a coffee break, allowing Bob to access her system and modify the project file. Reference:

Ten simple steps for keeping your laptop secure - Step 1: Require a password when logging in

6 Steps to Practice Strong Laptop Security - Step #1: Set complex passwords where it counts

A Practical Guide to Securing Your Windows PC - Section: Lock your computer when you step away


Question 6

Which of the following environmental controls options saves the hardware from humidity and heat,

increases hardware performance, and maintains consistent room temperature?



Answer : A

Hot and cold aisles are a type of environmental control that saves the hardware from humidity and heat, increases hardware performance, and maintains consistent room temperature. Hot and cold aisles are a layout design for data centers, where the server racks are arranged in alternating rows of cold air intake and hot air exhaust. The cold aisle faces the air conditioner output ducts and provides cool air to the front of the servers. The hot aisle faces the air conditioner return ducts and collects the hot air from the back of the servers. This way, the hot and cold air streams are separated and do not mix, resulting in better cooling efficiency, lower energy consumption, and longer hardware lifespan. Reference:

Hot and cold aisles - Week 4: Network Security Controls: Physical Controls

Hot and Cold Aisles: The Basics of Data Center Cooling

Hot Aisle vs. Cold Aisle Containment: Which One is Best for Your Data Center?


Question 7

Which of the following protocols uses TLS/SSL to ensure secure transmission of data over the Internet?



Answer : A

HTTPS (Hypertext Transfer Protocol Secure) is a protocol that uses TLS/SSL to ensure secure transmission of data over the Internet. HTTPS is an extension of HTTP, which is the standard protocol for transferring data between web servers and browsers. HTTPS encrypts the data exchanged between the client and the server, preventing anyone from intercepting, modifying, or stealing the data. HTTPS also verifies the identity of the server using digital certificates, preventing spoofing or phishing attacks. HTTPS is widely used for web applications that handle sensitive information, such as online banking, e-commerce, or social media. Reference:

HTTPS - Week 7: Email Security

How does SSL work? | SSL certificates and TLS | Cloudflare

SSL and TLS: A Beginners Guide | SANS Institute


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Total 75 questions