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Eccouncil Network Defense Essentials Exam NDE 112-51 Exam

Attempt the Network Defense Essentials practice test and solve real exam-like NDE 112-51 questions to prepare efficiently and increase your chances of success. Our Eccouncil 112-51 practice questions match the actual Network Defense Essentials Exam format, helping you enhance confidence and improve performance. With our NDE 112-51 practice exam software, you can analyze your performance, identify weak areas, and work on them effectively to boost your final Network Defense Essentials exam score.

Vendor:	Eccouncil
Exam Name:	Network Defense Essentials Exam
Registration Code:	112-51
Related Certification:	Eccouncil Network Defense Essentials Certification
Exam Audience:

Total Questions

Last Updated

02-09-2026

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Question: 1

Jamie wants to send a confidential file to her friend Alice. For this purpose, they installed an application for securely sharing the file. The application employs an encryption algorithm that uses the same shared secret key for encryption and decryption of data.

Identify the type of cryptography employed by the application used by Alice and Jamie for file sharing.

ASymmetric cryptography

BPublic-key cryptography

CRSA cryptosystem

DAsymmetric cryptography

Answer: A

Question: 2

Carol is a new employee at ApTech Sol Inc., and she has been allocated a laptop to fulfill his job activities.

Carol tried to install certain applications on the company's laptop but could not complete the installation as she requires administrator privileges to initiate the installation process. The administrator imposed an access policy on the company's laptop that only users with administrator privileges have installation rights.

Identify the access control model demonstrated in the above scenario.

ARule-based access control {RB-RBAC)

BMandatory access control {MAC)

CRole-based access control (RBAC)

DDiscretionary access control (DAC)

Answer: C

Explanation:

Role-based access control (RBAC) is a model that assigns permissions and privileges to users based on their roles in an organization. In RBAC, the administrator defines the roles and the access rights for each role, and then assigns users to those roles. This way, the administrator can control the access of users to the resources without having to manage each user individually. In the scenario, Carol is assigned a role that does not have the installation rights, while the administrator has a role that does. Therefore, the access control model demonstrated in the scenario is RBAC. Reference: Network Defense Essentials - EC-Council Learning, Network Defense Essentials (NDE) | Coursera, EC-Council Network Defense Essentials | NDE Certification

Question: 3

Jay, a network administrator, was monitoring traffic flowing through an IDS. Unexpectedly, he received an event triggered as an alarm, although there is no active attack in progress.

Identify the type of IDS alert Jay has received in the above scenario.

ATrue negative alert

BFalse positive alert

CTrue positive alert

DFalse negative alert

Answer: B

Explanation:

A false positive alert is a type of IDS alert that occurs when the IDS mistakenly identifies benign or normal traffic as malicious or suspicious, and triggers an alarm, although there is no active attack in progress. A false positive alert can be caused by various factors, such as misconfigured IDS rules, outdated signatures, network anomalies, or legitimate traffic that resembles attack patterns. A false positive alert can waste the time and resources of the security team, as they have to investigate and verify the alert, and also reduce the trust and confidence in the IDS. A false positive alert can be reduced by tuning and updating the IDS, filtering out irrelevant traffic, and using multiple detection methods. A false positive alert is the type of IDS alert Jay has received in the above scenario, as he received an event triggered as an alarm, although there is no active attack in progress. Reference:

False Positive Alert - Week 10: Intrusion Detection and Prevention Systems

What is a False Positive in Cybersecurity?

How to Reduce False Positives in Intrusion Detection Systems

Question: 4

George, a professional hacker, targeted a bank employee and tried to crack his password while he was attempting to log on to the remote server to perform his regular banking operations. In this process, George used sniffing tools to capture the password pairwise master key (PMK) associated with the handshake authentication process. Then, using the PMK, he gained unauthorized access to the server to perform malicious activities.

Identify the encryption technology on which George performed password cracking.

AWPA3

BWPA

CWPA2

DWEP

Answer: C

Explanation:

WPA2 (Wi-Fi Protected Access 2) is an encryption technology that secures wireless networks using the IEEE 802.11i standard. WPA2 uses a four-way handshake to authenticate the client and the access point, and to generate a pairwise transient key (PTK) for encrypting the data. The PTK is derived from the password pairwise master key (PMK), which is a shared secret between the client and the access point. The PMK can be obtained either by using a pre-shared key (PSK) or by using an 802.1X authentication server. In the above scenario, George performed password cracking on WPA2, as he used sniffing tools to capture the PMK associated with the handshake authentication process. Then, using the PMK, he was able to derive the PTK and decrypt the data exchanged between the client and the access point. Reference:

WPA2 - Wikipedia

How WPA2-PSK encryption works? - Cryptography Stack Exchange

WPA2 Encryption and Configuration Guide - Cisco Meraki Documentation

Question: 5

James was recruited as security personnel in an organization and was instructed to secure the organization's infrastructure from physical threats. To achieve this, James installed CCTV systems near gates, reception, hallways, and workplaces to capture illicit activities inside the premises, identify activities that need attention, collect images as evidence, and aid in an alarm system.

Identify the type of physical security control implemented by James in the above scenario.

AVideo surveillance

BFire-fighting systems

CLighting system

DPhysical barriers

Answer: A

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