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A listing of over 100 blog posts on the Security+exam. Posts are organized into categories such as:

 




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Recent Posts

  • Virtualization Technologies Weaknesses

    Virtualization Technologies Weaknesses

    Despite the strengths of virtualization technologies, you should understand some weaknesses. If you’re planning to take the SY0-501 exam, you’re expected to have a good understanding of virtualization concepts. This includes threats to virtual system security. For example, can you …
  • Capturing Network Traffic

    Capturing Network Traffic

    Several tools are available for use by security professionals and attackers alike. If you’re planning to take the SY0-501 exam, you should have a basic understanding of specific tools used to assess networks and manage risks. This includes using tools …
  • Comparing Backup Types

    Comparing Backup Types

    Backups are copies of data created to ensure that when the original data is lost or corrupted, it can be restored.  If you’re planning to take the SY0-501 exam, you should have a good understanding of backup utilities that support several …
  • Something You Have Authentication Factor

    Something You Have Authentication Factor

    Authentication is often simplified as types, or factors, of authentication. If you’re planning to take the SY0-501 exam, you should have a basic understanding of authentication factors. This includes the something you have authentication factor. For example, can you answer …
  • Failed Again – How Can I Pass

    Failed Again – How Can I Pass

    I recently received an email from Moe* complaining about the CompTIA Security+ exam. He closed with “I am honestly heartbroken… what do I do?” Six Steps To Pass Security+ Jaena, one of my assistants, answered. She gave some advice that …
  • Data Acquisition for Evidence

    Data Acquisition for Evidence

    Forensic experts use a variety of forensic procedures to collect and protect data after an attack. If you’re planning to take the SY0-501 exam, you should have a basic understanding of forensics concepts. This includes the process in data acquisition …
  • Filtering Traffic Using Firewall

    Filtering Traffic Using Firewall

    If you’re planning to take the SY0-501 exam, you should understand firewalls and how to filter traffic using a firewall. A firewall filters incoming and outgoing traffic for a single host or between networks. In other words, a firewall can …
  • Business Continuity Strategies

    Business Continuity Strategies

    If you’re planning to take the SY0-501 exam, you should understand business continuity strategies. This includes disaster recovery and continuity of operation concepts. Combined, these help ensure mission-critical functions continue to operate even if a disaster destroys a primary business location. …
  • Implementing File System Security

    Implementing File System Security

    If you’re planning to take the SY0-501 exam, you should have a good understanding of file system security as a method of protecting data. This includes understanding Linux systems that support GNU Privacy Guard (GnuPG or GPG), which is a …
  • Implementing Secure Network Using Devices

    Implementing Secure Network Using Devices

    If you’re planning to take the SY0-501 exam, you should have a basic understanding of implementing a secure network. This includes using various network devices to support organizational security. For example, can you answer this practice test question? Q. Your email …
  • Sample Performance-Based Question

    Sample Performance-Based Question

    A reader recently queried about a sample performance-based question he saw on CompTIA’s website. He was confused by it and wanted to know how he could answer it. Normally, it’s easy to answer these types of queries. I encourage the …
  • Identifying Application Attacks

    Identifying Application Attacks

    If you’re planning to take the SY0-501 exam, you should have a good understanding of the common attacks related to different types of servers. This includes a wide assortment of attacks such as application attacks and gaining some insight into preventing …
  • Near-Future Businesses That Will Require Digital Security Professionals

    Near-Future Businesses That Will Require Digital Security Professionals

    There is typically no shortage of need for digital security professionals. Our world is increasingly digital, and it seems that people are becoming more aware of the threats they face in this world by the day, meaning security is always …
  • Viewing Logs

    Viewing Logs

    While taking the SY0-501 exam, you may come across some questions that require you to read logs. This confuses some people because logs aren’t written in plain English. However, if you understand the objectives of the exam, you should be able …
  • Detecting Attacks and Protecting Systems

    Detecting Attacks and Protecting Systems

    Organizations need to understand and protect themselves from many different types of threat actors. If you’re planning to take the SY0-501 exam, you should have a good understanding of detecting attacks and protecting systems from these attacks. This includes how organizations and …

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

 

Virtualization Technologies Weaknesses

Posted by on August 19 in Security+ | 0 comments

Despite the strengths of virtualization technologies, you should understand some weaknesses. If you’re planning to take the SY0-501 exam, you’re expected to have a good understanding of virtualization concepts. This includes threats to virtual system security.

For example, can you answer this practice test question?

Q. Administrators frequently create VMs for testing. They sometimes leave these running without using them again after they complete their tests. Which of the following does this describe?

A. VM escape

B. VDI snapshot

C. VM sprawl

D. Type II hypervisor

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

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

Application Cell or Container Virtualization

Application cell virtualization or container virtualization runs services or applications within isolated application cells (or containers). For comparison, the figure shows an example of container virtualization. Notice that the containers don’t host an entire operating system. Instead, the host’s operating system and kernel run the service or app within each of the containers. However, because they are running in separate containers, none of the services or apps can interfere with services and apps in other containers.

Virtualization Technologies Weaknesses

Container-based virtualization

A benefit of container virtualization is that it uses fewer resources and can be more efficient than a system using a traditional Type II hypervisor virtualization. Internet Service Providers (ISPs) often use it for customers who need specific applications. One drawback is that containers must use the operating system of the host. As an example, if the host is running Linux, all the containers must run Linux.

Risks Associated with Virtualization

Despite the strengths of virtualization technologies, you should understand some weaknesses. Many people consider virtual machine escape (VM escape) to be the most serious threat to virtual system security. Loss of confidentiality and loss of availability can also be a concern.

VM Escape

VM escape is an attack that allows an attacker to access the host system from within the virtual system. As previously mentioned, the host system runs an application or process called a hypervisor to manage the virtual systems. In some situations, the attacker can run code on the virtual system and interact with the hypervisor.

Most virtual systems run on a physical server with elevated privileges, similar to administrator privileges. A successful VM escape attack often gives the attacker unlimited control over the host system and each virtual system within the host.

When vendors discover VM escape vulnerabilities, they write and release patches. Just as with any patches, it is important to test and install these patches as soon as possible. This includes keeping both the physical and the virtual servers patched.

VM Sprawl

VM sprawl occurs when an organization has many VMs that aren’t managed properly. Most organizations have specific policies in place to ensure physical servers are kept up to date and personnel only make changes to these servers after going through a change management process. These same policies should also apply to virtual servers.

Consider this scenario. Bart creates a VM running a Microsoft Windows Server version to test a software application. After testing the application, he leaves the VM running. Later, Microsoft releases security patches for the server. The IT department tests these patches and applies them to all of the known servers that need them. However, because Bart didn’t tell anyone he was creating the VM, it remains unpatched and vulnerable to attack.

Another challenge with VM sprawl is that each VM adds additional load onto a server. If unauthorized VMs are added to physical servers, they can consume system resources. The servers might become slower and potentially crash.

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.

Loss of Confidentiality

As a reminder, each virtual system or virtual machine is just one or more files. Although this makes it easy to manage and move virtual machines, it also makes them easy to steal.

It’s worth pointing out that many VMs include the operating system and data, just as a physical system would have both the operating system and data on its physical drives. For example, a virtual machine can include a database with credit card data, company financial records, or any type of proprietary data.

Imagine if an administrator became disgruntled. He has access to the systems and as a malicious insider, he can copy the virtual machine, take it home, and launch it on another physical server. At this point, he has access to the system and the data.


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. Administrators frequently create VMs for testing. They sometimes leave these running without using them again after they complete their tests. Which of the following does this describe?

A. VM escape

B. VDI snapshot

C. VM sprawl

D. Type II hypervisor

Answer is C. VM sprawl occurs when an organization has many VMs that aren’t managed properly. Unmonitored VMs typically won’t get updated and can be vulnerable to attacks.

VM escape is an attack that allows an attacker to access the host system from within the virtual system. A virtual desktop infrastructure (VDI) provides users with virtual desktops hosted on a server.

A VDI snapshot is commonly used to provide users with the same non-persistent desktop that doesn’t save changes.

The VMs might be Type II hypervisors (running as software within a host operating system), but that isn’t relevant to leaving them running and unmonitored.

See Chapter 1 of the CompTIA Security+: Get Certified Get Ahead: SY0-501 Study Guide for more information on implementing virtualization.

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

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