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Eccouncil 112-51 Exam Questions

Exam Name: Network Defense Essentials Exam
Exam Code: 112-51 NDE
Related Certification(s): Eccouncil Network Defense Essentials Certification
Certification Provider: Eccouncil
Number of 112-51 practice questions in our database: 75 (updated: Feb. 19, 2026)
Expected 112-51 Exam Topics, as suggested by Eccouncil :
  • Topic 1: Network Security Fundamentals: This component assesses an IT professional's knowledge of the principles behind network security, as well as the dangers and weaknesses connected to networks. This section aims to provide network engineers and security experts with an understanding of the various network security protocols, their purposes, and the ways in which they contribute to the overall security of the network.
  • Topic 2: Identification, Authentication, and Authorization: This part addresses the basic concepts, jargon, and models associated with identifying, authenticating, and authorizing users and systems in a network environment. It is intended for security administrators and access control managers.
  • Topic 3: Identity and Access Management (IAM) Concepts: An overview of IAM concepts, components, and their function in network resource security is given in this section for security architects and IAM administrators.
  • Topic 4: Administrative Controls for Network Security: This section gives an overview of IAM ideas, components, and its function in network resource security for security architects and IAM administrators.
  • Topic 5: Administrative Controls for Network Security: This section addresses the creation and application of security policies, standards, processes, and recommendations for compliance officers and security policy makers to safeguard network assets. It also entails being aware of the legal and regulatory frameworks around network security.
  • Topic 6: Physical Controls for Network Security: This section highlights the significance of physical security measures for safeguarding network infrastructure and data, especially for physical security workers and building managers. It addresses several physical security measures and how to apply them.
  • Topic 7: Technical Controls for Network Security: This section is intended for network engineers and security architects and focuses on technical safeguards for network systems and data.
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Kristel

14 hours ago
I worried I wouldn't recall essential controls and incident response steps, but PASS4SUCCESS reinforced memory through repetition and scenario-based questions. Stay persistent; you'll do great.
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Ressie

9 days ago
The questions on incident response and chain of custody were brutal. PASS4SUCCESS scenarios gave me realistic workflow practice that paid off.
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Denny

16 days ago
The Eccouncil Network Defense Essentials Exam was challenging, but I passed with the help of Pass4Success. One question that I found confusing was about physical controls for network security, specifically the use of access control systems. I wasn't sure about the best practices for their implementation.
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Susana

23 days ago
I passed the Eccouncil Network Defense Essentials Exam, and Pass4Success practice questions were instrumental in my success. There was a tricky question about identification, authentication, and authorization, particularly about the use of biometric authentication methods. I had to think hard about the pros and cons.
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Sage

1 month ago
Nervousness hit me hard before the test, yet PASS4SUCCESS turned chaos into clarity with targeted practice and explanations. Trust the process and embrace the challenge ahead.
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Cortney

1 month ago
Passing the Eccouncil Network Defense Essentials Exam was a great achievement, thanks to Pass4Success. One question that I found difficult was about technical controls for network security, specifically about the use of firewalls. I wasn't entirely confident about the differences between hardware and software firewalls.
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Tu

2 months ago
Configuration drift and hardening guides were my nemesis. The practice quizzes exposed gaps, and PASS4SUCCESS helped me build a solid playbook.
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Tenesha

2 months ago
Implementing baseline security controls was tougher than I expected. The drills on control selection in PASS4SUCCESS made me choose the right controls faster.
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Carin

2 months ago
The exam tested knowledge on security information and event management (SIEM) systems. Know how SIEM works and its role in network defense.
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Theodora

2 months ago
Definitely use the PASS4SUCCESS practice tests to time yourself and get used to the exam format. That's the best way to manage your time on test day.
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Carla

3 months ago
The tricky part was cryptographic basics and TLS inspection. The mock exams highlighted common missteps, and PASS4SUCCESS prep kept me honest about what I truly needed to know.
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Lillian

3 months ago
I successfully passed the Eccouncil Network Defense Essentials Exam, and Pass4Success was a big help. A challenging question on the exam was about administrative controls for network security, particularly about incident response plans. I had to guess a bit, but it worked out.
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Ressie

3 months ago
I felt uneasy about the timing and breadth of topics. PASS4SUCCESS guided my study plan and provided practical drills that sharpened my speed and accuracy. You're closer than you think—keep going!
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Lelia

3 months ago
Passing the Eccouncil Network Defense Essentials Exam was a game-changer for me. The PASS4SUCCESS practice exams were a lifesaver - they really helped me identify my weak areas and focus my studies.
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Davida

4 months ago
The Eccouncil Network Defense Essentials Exam was tough, but I passed with the help of Pass4Success. One question that puzzled me was related to network security fundamentals, specifically about the different types of network topologies. I wasn't entirely sure about the advantages of each topology.
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Marica

4 months ago
Initial nerves nearly froze me out, but PASS4SUCCESS offered structured prep and realistic simulations that boosted my confidence. Stay focused, keep practicing, and the results will follow.
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Georgiann

4 months ago
I struggled with MITRE ATT&CK mappings in defenses and incident triage. PASS4SUCCESS practice exams forced me to think in attacker terms, and that perspective finally clicked.
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Sharmaine

4 months ago
I passed the Eccouncil Network Defense Essentials Exam, and Pass4Success practice questions were very helpful. There was a challenging question about Identity and Access Management (IAM) concepts, particularly about role-based access control (RBAC). I had to think carefully about how it is implemented.
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Brandon

5 months ago
The hardest part for me was understanding network segmentation and VLAN security; the practice questions drilled me on edge cases, and PASS4SUCCESS helped me map lab scenarios to exam concepts.
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Ricarda

5 months ago
My hands shook on exam day and I doubted I could remember anything. PASS4SUCCESS helped me build a solid study routine and reinforced key concepts, leaving me calm and ready. Believe in yourself and go for it!
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Vilma

5 months ago
I was nervous at the start, overwhelmed by the exam scope, but PASS4SUCCESS broke it down into manageable chunks and gave me confident practice questions. You've got this—keep pushing and you'll ace it just like I did.
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Leatha

5 months ago
Passing the Eccouncil Network Defense Essentials Exam was a great feeling, thanks to Pass4Success. One question that stumped me was about physical controls for network security, specifically the use of surveillance cameras. I wasn't sure about the best practices for their placement and use.
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Elmira

5 months ago
Data loss prevention (DLP) strategies were covered. Understand different DLP techniques and how they're implemented in various network components.
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Gerald

6 months ago
I recently passed the Eccouncil Network Defense Essentials Exam, and Pass4Success was a huge help. A difficult question on the exam was about identification, authentication, and authorization, particularly the use of single sign-on (SSO) systems. I had to think hard about the benefits and drawbacks.
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Theodora

6 months ago
Successfully certified in Eccouncil NDE! Pass4Success's materials were key to my quick preparation.
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Herman

6 months ago
IoT security was featured. Familiarize yourself with common IoT vulnerabilities and best practices for securing IoT devices in a network.
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Lashawna

8 months ago
The exam included scenarios on disaster recovery and business continuity. Know the key components of DR and BC plans and how they relate to network security.
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Micaela

8 months ago
Questions on network segmentation were tricky. Study different approaches to network segmentation and their security benefits.
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Audry

8 months ago
Network Defense Essentials exam conquered! Pass4Success made my preparation efficient and effective.
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Fausto

9 months ago
Vulnerability assessment was a key topic. Understand the process of conducting a vulnerability assessment and interpreting the results.
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Erinn

9 months ago
Eccouncil certification secured! Pass4Success's exam questions were spot-on and time-saving.
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Iluminada

10 months ago
Authentication mechanisms were covered in detail. Know the differences between various authentication factors and multi-factor authentication implementations.
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Lashawn

10 months ago
Pass4Success came through for my Network Defense Essentials exam. Passed with confidence!
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Candra

11 months ago
The exam tested knowledge on secure network design principles. Be ready to apply concepts like defense-in-depth and least privilege to network architectures.
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Aimee

12 months ago
Aced the Eccouncil NDE exam thanks to Pass4Success's relevant practice materials.
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Vicky

12 months ago
Cloud security was an important area. Understand the shared responsibility model and specific security considerations for different cloud service models (IaaS, PaaS, SaaS).
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Kristofer

1 year ago
Questions on malware types and behaviors were challenging. Study different categories of malware and their typical infection vectors and impacts.
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Dong

1 year ago
Network Defense Essentials certification in the bag! Couldn't have done it without Pass4Success.
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Bobbie

1 year ago
Network monitoring tools were featured. Be familiar with common tools like Wireshark and Nmap, and understand how to interpret their outputs.
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Evette

1 year ago
The exam included scenarios on incident response. Know the steps of the incident response process and how to apply them in different situations.
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Salena

1 year ago
Eccouncil cert achieved! Pass4Success's exam questions were incredibly helpful for last-minute prep.
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Lai

1 year ago
The Eccouncil Network Defense Essentials Exam was challenging, but I passed with the help of Pass4Success. One question that I found confusing was about technical controls for network security, specifically the use of encryption protocols. I wasn't sure about the differences between SSL and TLS.
upvoted 0 times
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Destiny

1 year ago
Social engineering attacks were a hot topic. Familiarize yourself with different types of social engineering techniques and how to defend against them.
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Vallie

1 year ago
Wireless network security was covered extensively. Study WEP, WPA, and WPA2 protocols, their vulnerabilities, and best practices for securing wireless networks.
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Carylon

1 year ago
Thank you Pass4Success! Your practice questions were crucial for my Eccouncil NDE exam success.
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Genevive

1 year ago
I passed the Eccouncil Network Defense Essentials Exam, and Pass4Success practice questions were instrumental in my success. There was a tricky question about administrative controls for network security, particularly regarding risk assessment procedures. I had to guess a bit, but it worked out.
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Loreen

1 year ago
Network security policies came up frequently. Practice creating and evaluating security policies for different types of organizations. Know the key components of a good security policy.
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Jenifer

1 year ago
Passing the Eccouncil Network Defense Essentials Exam was a great achievement, thanks to Pass4Success. One question that I found difficult was about network security fundamentals, specifically the OSI model layers. I wasn't entirely confident about the functions of each layer.
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Eun

1 year ago
Access control models were a significant part. Be ready to compare and contrast DAC, MAC, and RBAC. Understand how they're implemented in different scenarios.
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Audry

1 year ago
Passed my Network Defense Essentials exam with flying colors. Pass4Success made it possible in record time!
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Lorrine

1 year ago
I successfully passed the Eccouncil Network Defense Essentials Exam, and Pass4Success was a big help. A challenging question on the exam was about Identity and Access Management (IAM) concepts, particularly the principle of least privilege. I had to think carefully about how it applies in different scenarios.
upvoted 0 times
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Audria

1 year ago
Virtual Private Networks (VPNs) were heavily featured. Study different VPN protocols, their strengths, and weaknesses. Know how to set up and troubleshoot basic VPN configurations.
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Jeanice

1 year ago
The Eccouncil Network Defense Essentials Exam was tough, but I passed with the help of Pass4Success. One question that puzzled me was related to physical controls for network security, specifically about the use of biometric systems. I wasn't sure how to differentiate between various biometric methods.
upvoted 0 times
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Juan

1 year ago
Eccouncil NDE exam success! Grateful for Pass4Success's relevant study materials.
upvoted 0 times
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Jill

1 year ago
Cryptography questions were tricky. Focus on understanding symmetric vs. asymmetric encryption, common algorithms, and their applications in network security.
upvoted 0 times
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Micheline

1 year ago
I just passed the Eccouncil Network Defense Essentials Exam, and the Pass4Success practice questions were a lifesaver. There was a question about identification, authentication, and authorization that asked about multi-factor authentication methods. I wasn't entirely sure about the best practices, but I managed to pass.
upvoted 0 times
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Annamaria

1 year ago
The exam covered a lot on intrusion detection systems. Be prepared to identify different types of IDS and their deployment strategies. Know the difference between signature-based and anomaly-based detection.
upvoted 0 times
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Tiara

1 year ago
Passing the Eccouncil Network Defense Essentials Exam felt great, especially with the aid of Pass4Success practice questions. One question that caught me off guard was about the technical controls for network security, particularly intrusion detection systems (IDS). I had to think hard about the differences between IDS and IPS.
upvoted 0 times
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Refugia

1 year ago
Nailed the Network Defense Essentials cert! Pass4Success materials were a lifesaver for quick prep.
upvoted 0 times
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Jolanda

1 year ago
Firewall configuration was a key topic. Expect questions on different types of firewalls and their appropriate placement in a network. Understanding stateful vs. stateless firewalls is crucial.
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Eugene

1 year ago
The Eccouncil Network Defense Essentials Exam was a challenging yet rewarding experience. Thanks to Pass4Success, I was well-prepared. There was a tricky question on the exam about the role of administrative controls in network security, specifically regarding policy enforcement. I wasn't confident about my answer, but I still passed!
upvoted 0 times
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Ernest

1 year ago
Just passed the Eccouncil Certified: Network Defense Essentials Exam! The questions on network protocols were challenging. Make sure to study TCP/IP in depth, especially regarding packet structure and common vulnerabilities.
upvoted 0 times
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Louisa

1 year ago
I recently passed the Eccouncil Network Defense Essentials Exam, and I must say, the Pass4Success practice questions were incredibly helpful. One question that stumped me was about the different types of firewalls used in network security. I wasn't entirely sure about the specifics of stateful versus stateless firewalls, but I managed to get through it.
upvoted 0 times
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Delsie

2 years ago
Just passed the Eccouncil Network Defense Essentials exam! Thanks Pass4Success for the spot-on practice questions.
upvoted 0 times
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Juliann

2 years ago
I'm glad I passed! Vulnerability assessment was another crucial topic. Be ready for questions on different scanning techniques and tools. Review common vulnerabilities and their remediation strategies. Pass4Success's practice exams were invaluable in my preparation.
upvoted 0 times
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Gennie

2 years ago
Eccouncil certified! Pass4Success's exam questions were right on target. Appreciative of the quick and effective preparation. Thanks!
upvoted 0 times
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Donte

2 years ago
Cryptography played a significant role in the exam. Expect questions on symmetric vs. asymmetric encryption algorithms and their applications in network security. Study key exchange protocols and digital signatures. Pass4Success really helped me prepare efficiently!
upvoted 0 times
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Dorcas

2 years ago
Network Defense Essentials certification achieved! Pass4Success, your exam prep was invaluable. Couldn't have done it without your relevant questions.
upvoted 0 times
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Xenia

2 years ago
Eccouncil exam success! Pass4Success's materials were a lifesaver. Grateful for the relevant practice questions that made all the difference.
upvoted 0 times
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Jody

2 years ago
Passed the Eccouncil exam with flying colors! Pass4Success, your practice tests were key to my success. Thank you for the efficient prep!
upvoted 0 times
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Shizue

2 years ago
Just passed the Eccouncil Certified: Network Defense Essentials Exam! Pass4Success's practice questions were spot-on. Thanks for helping me prepare so quickly!
upvoted 0 times
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Weldon

2 years ago
The exam covered a lot on intrusion detection systems. Be prepared for scenarios where you need to identify the appropriate IDS type for specific network environments. Review signature-based and anomaly-based detection methods. Thanks to Pass4Success for their spot-on practice questions!
upvoted 0 times
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Free Eccouncil 112-51 Exam Actual Questions

Note: Premium Questions for 112-51 were last updated On Feb. 19, 2026 (see below)

Question #1

Kelly, a cloud administrator at TechSol Inc., was instructed to select a cloud deployment model to secure the corporate data and retain full control over the data.

Which of the following cloud deployment models helps Kelly in the above scenario?

Reveal Solution Hide Solution
Correct Answer: D

A private cloud is a cloud deployment model that is exclusively used by a single organization and is hosted either on-premises or off-premises by a third-party provider. A private cloud offers the highest level of security and control over the data and resources, as the organization can customize the cloud infrastructure and services according to its needs and policies. A private cloud also ensures better performance and availability, as the organization does not share the cloud resources with other users. A private cloud is suitable for organizations that have sensitive or confidential data, strict compliance requirements, or high demand for scalability and flexibility. A private cloud can help Kelly secure the corporate data and retain full control over the data in the above scenario. Reference:

Private Cloud - Week 6: Virtualization and Cloud Computing

Private Cloud vs Public Cloud vs Hybrid Cloud

Private Cloud Security: Challenges and Best Practices


Question #3

Cibel.org, an organization, wanted to develop a web application for marketing its products to the public. In this process, they consulted a cloud service provider and requested provision of development tools, configuration management, and deployment platforms for developing customized applications.

Identify the type of cloud service requested by Cibel.org in the above scenario.

Reveal Solution Hide Solution
Correct Answer: B

The type of cloud

The type of cloud service requested by Cibel.org in the above scenario is Platform-as-a-service (PaaS). PaaS is a cloud-based service that delivers a range of developer tools and deployment capabilities. PaaS provides a complete, ready-to-use, cloud-hosted platform for developing, running, maintaining and managing applications. PaaS customers do not need to install, configure, or manage the underlying infrastructure, such as servers, storage, network, or operating system. Instead, they can focus on the application development and deployment process, using the tools and services provided by the cloud service provider. PaaS solutions support cloud-native development technologies, such as microservices, containers, Kubernetes, serverless computing, that enable developers to build once, then deploy and manage consistently across private cloud, public cloud and on-premises environments. PaaS also offers features such as scalability, availability, security, backup, and monitoring for the applications.PaaS is suitable for organizations that want to develop customized applications without investing in or maintaining the infrastructure123.Reference:

Network Defense Essentials Courseware, EC-Council, 2020, pp. 3-40 to 3-41

What is PaaS? A Beginner's Guide to Platform as a Service - G2, G2, February 19, 2020

Cloud Service Models Explained: SaaS, IaaS, PaaS, FaaS - Jelvix, Jelvix, July 14, 2020


Question #4

Which of the following ISO standards provides guidance to ensure that cloud service providers offer appropriate information security controls to protect the privacy of their customer's clients by securing personally identifiable information entrusted to them?

Reveal Solution Hide Solution
Correct Answer: B

ISO/IEC 27018 is the ISO standard that provides guidance to ensure that cloud service providers offer appropriate information security controls to protect the privacy of their customer's clients by securing personally identifiable information entrusted to them. ISO/IEC 27018 is a code of practice for protecting personal information in cloud storage. The term for the personal data it covers is Personally Identifiable Information or PII. ISO/IEC 27018 is an addendum to ISO/IEC 27001, the first international code of practice for cloud privacy. It helps cloud service providers who process PII to assess risk and implement controls for protecting PII. ISO/IEC 27018 was created in 2014 and updated in 2019. It has the following objectives:

Help the public cloud service provider to comply with applicable obligations when acting as a PII processor, whether such obligations fall on the PII processor directly or through contract.

Enable the public cloud PII processor to be transparent in relevant matters so that cloud service customers can select well-governed cloud-based PII processing services.

Assist the cloud service customer and the public cloud PII processor in entering into a contractual agreement.

Provide cloud service customers with a mechanism for exercising audit and compliance rights and responsibilities in cases where individual cloud service customer audits of data hosted in a multiparty, virtualized server (cloud) environment can be impractical technically and can increase risks to those physical and logical network security controls in place123.


ISO/IEC 27018: Protecting PII in Public Clouds - ISMS.online, ISMS.online, 2019

ISO/IEC 27018 - Wikipedia, Wikipedia, 2021

ISO/IEC 27018:2019 - Information technology --- Security techniques --- Code of practice for protection of personally identifiable information (PII) in public clouds acting as PII processors, ISO, 2019

Question #5

Ben, a computer user, applied for a digital certificate. A component of PKI verifies Ben's identity using the credentials provided and passes that request on behalf of Ben to grant the digital certificate.

Which of the following PKI components verified Ben as being legitimate to receive the certificate?

Reveal Solution Hide Solution
Correct Answer: B

The PKI component that verified Ben as being legitimate to receive the certificate is the registration authority (RA). An RA is an entity that is responsible for identifying and authenticating certificate applicants, approving or rejecting certificate applications, and initiating certificate revocations or suspensions under certain circumstances. An RA acts as an intermediary between the certificate authority (CA) and the certificate applicant, and performs the necessary checks and validations before forwarding the request to the CA. The CA is the entity that signs and issues the certificates, and maintains the certificate directory and the certificate revocation list. A certificate directory is a repository of issued certificates that can be accessed by users or applications to verify the validity and status of a certificate. A validation authority (VA) is an entity that provides online certificate validation services, such as OCSP or SCVP, to verify the revocation status of a certificate in real time123. Reference:

Public key infrastructure - Wikipedia, Wikipedia, March 16, 2021

Components of a PKI - The National Cyber Security Centre, NCSC, 2020

Network Defense Essentials Courseware, EC-Council, 2020, pp. 3-26 to 3-27


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