Logical Access Control Principles

Posted by in Security+ | 0 comments

If you’re planning on taking the Security+ exam, you should have a good understanding of implementing logical access control methods. When studying these methods, it’s valuable to understand some underlying principles.

For example, can you answer this question?

Q. You maintain a training lab with 18 computers. You have enough rights and permissions on these machines so that you can configure them as needed for classes. However, you do not have the rights to add them to your organization’s domain. Which of the following choices BEST describes this example?

A. Least privilege

B. Need to know

C. User-based privileges

D. Separation of duties

More, do you know why the correct answer is correct and the incorrect answers are incorrect? The answer and explanation is available at the end of this post.

Get Certified Get Ahead

Logical access control methods are implemented through technologies such as Group Policy and account management tools. They control access to the logical network as opposed to controlling access to the physical areas of a building or physical access to devices within the network. Some underlying principles are the principle of least privilege and the principle of need to know. 

Least Privilege

The principle of least privilege is an example of a technical control implemented with access controls. Privileges are the rights and permissions assigned to authorized users. Least privilege specifies that individuals and processes are granted only the rights and permissions needed to perform assigned tasks or functions, but no more. For example, if Lisa needs read access to a folder on a server, you should grant her read access to that folder, but nothing else.

A primary goal of implementing least privilege is to reduce risks. As an example, imagine that Carl works at the Nuclear Power Plant, but administrators have not implemented the principle of least privilege. In other words, Carl has access to all available data within the Nuclear Power Plant, not just the limited amount of data he needs to perform his job. Later, Lenny gets into trouble and needs money, so he convinces Carl to steal data from the power plant so that they can sell it. In this scenario, Carl can steal and sell all the data at the plant, which can result in serious losses.

Access Control

In contrast, if administrators applied the principle of least privilege, Carl would only have access to a limited amount of data. Even if Lenny convinces him to steal the data, Carl wouldn’t be able to steal very much simply because he doesn’t have access to it. This limits the potential losses for the power plant.

CompTIA Security+ Study Guide

The 501 Version of the Study Guide

The CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide is an update to the top-selling SY0-201, SY0-301, and SY0-401 study guides, which have helped thousands of readers pass the exam the first time they took it.  It includes the same elements readers raved about in the previous three versions.

Each of the eleven chapters presents topics in an easy to understand manner and includes real-world examples of security principles in action.

You’ll understand the important and relevant security topics for the Security+ exam, without being overloaded with unnecessary details. Additionally, each chapter includes a comprehensive review section to help you focus on what’s important.



Over 300 realistic practice test questions with in-depth explanations will help you test your comprehension and readiness for the exam. The book includes:

  • A 75 question pre-test
  • A 75 question post-test
  • Practice test questions at the end of every chapter.

Each practice test question includes a detailed explanation to help you understand the content and the reasoning behind the question. You’ll be ready to take and pass the exam the first time you take it.

If you plan to pursue any of the advanced security certifications, this guide will also help you lay a solid foundation of security knowledge. Learn this material, and you’ll be a step ahead for other exams. This SY0-501 study guide is for any IT or security professional interested in advancing in their field, and a must-read for anyone striving to master the basics of IT security.

Kindle edition also available.

This principle applies to regular users and administrators. As an example, if Marge administers all the computers in a training lab, it’s appropriate to give her administrative control over all these computers. However, her privileges don’t need to extend to the domain, so she wouldn’t have administrative control over all the computers in a network. Additionally, she wouldn’t have the privileges required to add these computers to the domain, unless that was a requirement in the training lab. Similarly, if a network administrator needs to review logs and update specific network devices, it’s appropriate to give the administrator access to these logs and devices, but no more.

Many services and applications run under the context of a user account. These services have the privileges of this user account, so it’s important to ensure that these accounts are only granted the privileges needed by the service or the application. In the past, many administrators configured these service and application accounts with full administrative privileges. When attackers compromised a service or application configured this way, they gained administrative privileges and wreaked havoc on the network.

Remember this

Least privilege is a technical control. It specifies that individuals or processes are granted only those rights and permissions needed to perform their assigned tasks or functions.

Full Security+ Course

SY0-501 Full Security+ Course

Helping you Pass the First Time

Online access includes all of the content from the

CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide

  • Introduction
  • About the exam (including information on the number of questions, test duration, passing score, types of questions and more. Also includes a listing of the exam objectives)
  • 75 question pre-assessment exam
  • Mastering Security Basics (full content from Chapter 1 of the study guide including the exam topic review and 15 practice test questions)
  • Understanding Identity and Access Management (full content from Chapter 2 of the study guide including the exam topic review and 15 practice test questions)
  • Exploring Network Technologies and Tools (full content from Chapter 3 of the study guide including the exam topic review and 15 practice test questions)
  • Securing Your Network (full content from Chapter 4 of the study guide including the exam topic review and 15 practice test questions)
  • Securing Hosts and Data (full content from Chapter 5 of the study guide including the exam topic review and 15 practice test questions)
  • Comparing Threats, Vulnerabilities, and Common Attacks (full content from Chapter 6 of the study guide including the exam topic review and 15 practice test questions)
  • Protecting Against Advanced Attacks (full content from Chapter 7 of the study guide including the exam topic review and 15 practice test questions)
  • Using Risk Management Tools (full content from Chapter 8 of the study guide including the exam topic review and 15 practice test questions)
  • Implementing Controls to Protect Assets (full content from Chapter 9 of the study guide including the exam topic review and 15 practice test questions)
  • Understanding Cryptography and PKI (full content from Chapter 10 of the study guide including the exam topic review and 15 practice test questions)
  • Implementing Policies to Mitigate Risks (full content from Chapter 11 of the study guide including the exam topic review and 15 practice test questions)
  • 75 question post-assessment exam
  • Glossary

Get the SY0-501 Full Security+ Course Here


Test your readiness with these quality materials

Random 75-question tests

Random practice tests from the all of the practice test questions in the CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide. All questions include explanations so you'll know why the correct answers are correct, and why the incorrect answers are incorrect.

3 sets Performance-based Questions

Three new sets of performance-based questions with a total of 30 questions. These new questions use a new testing engine that includes realistic drag and drop, matching, sorting, and fill in the blank questions.

Flashcard Set

  • 494 Online Security+ Glossary Flashcards
  • 222 Online Security+ Acronyms Flashcards
  • 223 Online Security+ Remember This Slide from the popular CompTIA Security+ Get Certified Get Ahead: SY0-501 Study Guide

Audio - SY0-501 Security+ Remember This Audio Files

Learn by Listening. Over one hour and 20 minutes of audio (MP3 downloads.)

Audio - SY0-501 Security+ Question and Answer Audio Files

Learn by Listening. Over two hours hour and 53 minutes of audio (MP3 downloads.)

Bonus #1

Audio from the end of chapter reviews from each of the chapters in the CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide. Over one hour and 40 minutes of additional audio.

Bonus #2

Access to all of the online content that is available for free to anyone that purchases the CompTIA Security+ Get Certified Get Ahead: SY0-501 Study Guide. This includes labs, extra practice test questions, and supplementary materials

Bonus #3 

Access the study materials for a total of 60 days because sometimes life happens.

Get the SY0-501 Full Security+ Course Here

Need to Know

The principle of need to know is similar to the principle of least privilege in that users are granted access only to the data and information that they need to know for their job. Notice that need to know is focused on data and information, which is typically protected with permissions. In contrast, the principle of least privilege includes both rights and permissions.

Rights refer to actions and include actions such as the right to change the system time, the right to install an application, or the right to join a computer to a domain. Permissions typically refer to permissions on files, such as read, write, and modify.


Security+ Practice Test Questions

SY0-501 Practice Test Questions 

Over 300 realistic Security+ practice test questions

All questions include explanations so you'll know why the correct answers are correct,

and why the incorrect answers are incorrect.

Pass the Security+ Exam

the First Time You Take It

Multiple quiz formats to let you use these questions based on the way you learn.
  • Learn mode - randomized. View each of the questions in random order. Learn mode allows you to keep selecting answers until you select the correct answer. Once you select the correct answer, you'll see the explanation. Click here to see how learn mode works.
  • Learn mode - not randomized. View each of the questions in the same order. Use this if you want to make sure that you see all of the questions. Learn mode allows you to keep selecting answers until you select the correct answer. Once you select the correct answer, you'll see the explanation. Click here to see how learn mode works.
  • Test mode - randomized. View each of the questions in random order. In test mode, you can only see the correct answers and explanations after you complete the test. Click here to see how test mode works.
  • Test mode - not randomized. View each of the questions in the same order. In test mode, you can only see the correct answers and explanations after you complete the test. Click here to see how test mode works.
  • Test mode - 75 random questions. View 75 random questions from the full test bank similar to how the Security+ exam has a potential maximum of 75 multiple choice questions. In test mode, you can only see the correct answers and explanations after you complete the test. Click here to see how test mode works.

Get the full bank of SY0-501 Practice Test Questions Here

 SY0-501 Practice Test Questions


INCLUDES QUESTIONS TO HELP YOU PREPARE

FOR THE NEW PERFORMANCE BASED QUESTIONS 

Bonus - Performance Based Questions

Three sets of performance-based questions including over 30 questions. These questions show you what you can expect in the live exam. They include drag and drop, matching, sorting, and fill in the blank questions. See a demo here.

Bonus - Extra Practice Test Questions

New multiple-choice questions in the extra test bank. Questions are added occasionally. You can see what has been added recently here.

Get the full bank of Security+ (SYO-501) Practice Test Questions Here

Get the full bank of Security+ Practice Test Questions

Click here if you're looking for SY0-501 Full Study Package

Q. You maintain a training lab with 18 computers. You have enough rights and permissions on these machines so that you can configure them as needed for classes. However, you do not have the rights to add them to your organization’s domain. Which of the following choices BEST describes this example?

A. Least privilege

B. Need to know

C. User-based privileges

D. Separation of duties

Answer is A. When following the principle of least privilege, individuals have only enough rights and permissions to perform their job, and this is exactly what is described in this scenario.

Need to know typically refers to data and information rather than the privileges required to perform an action, such as adding computers to a domain.

User-based privileges refer to giving permissions to individual users rather than groups, and this question doesn’t address either user-based privileges or group-based privileges.

Separation of duties is a principle that prevents any single person or entity from being able to complete all the functions of a critical or sensitive process, and it isn’t addressed in this question either.

See Chapter 2 of the CompTIA Security+: Get Certified Get Ahead: SY0-401 Study Guide for more information on control types and methods.

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

CompTIA Security+ Get Certified Get Ahead: SY0-501 Study Guide

Subscribe To Our Newsletter

Join our mailing list and get a free excerpt of the CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide.  This excerpt includes the introduction and Chapter 1. 

You have Successfully Subscribed!

Get Certified Get Ahead is a participant in the Amazon Services LLC Associates Program,
an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.

Copyright © 2015 Get Certified Get Ahead. All Rights Reserved.