802.1x Server Authentication Methods

Posted by in Security+ | 0 comments

An 802.1x server is integrated with a database of accounts and it provides port-based authentication by requiring users and devices to authenticate before granting them access to a network. If you’re planning on taking the Security+ exam, you should have a basic understanding of authentication methods to increase the level of security including the method used for 802.1x servers.

For example, can you answer this question?

Q. You are planning a wireless network for a business. A core requirement is to ensure that the solution encrypts user credentials when users enter their usernames and passwords. Which of the following BEST meets this requirement?

A. WPA2-PSK

B. WEP over PEAP

C. WPS with LEAP

D. WPA2 over EAP-TTLS

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

Extensible Authentication Protocol

The Extensible Authentication Protocol (EAP) is an authentication framework that provides general guidance for authentication methods. 802.1x servers typically use one of these methods to increase the level of security during the authentication process. Some methods are:

  • EAP. EAP provides a method for two systems to create a secure encryption key, also known as a Pairwise Master Key (PMK). Systems then use this key to encrypt all data transmitted between the devices. Both TKIP or AES-based CCMP use this key, though CCMP is much more secure.
  • Protected EAP (PEAP). PEAP provides an extra layer of protection for EAP. The EAP designers assumed that EAP would be used with adequate physical security to ensure the communication channel was secure. In practice, that wasn’t always the case, but PEAP protects the channel. PEAP encapsulates and encrypts the EAP conversation in a Transport Layer Security (TLS) tunnel. PEAP requires a certificate on the server, but not the clients. A common implementation is with Microsoft Challenge Handshake Authentication Protocol version 2 (MS-CHAPv2).
  • EAP-Tunneled TLS (EAP-TTLS). This is an extension of PEAP, allowing systems to use some older authentication methods such as Password Authentication Protocol (PAP) within a TLS tunnel. It requires a certificate on the 802.1x server but not the clients.

 802.1x Server

  • EAP-TLS. This is one of the most secure EAP standards and is widely implemented. The primary difference between PEAP and EAP-TLS is that it requires certificates on the 802.1x server and on each of the wireless clients.
  • Lightweight EAP (LEAP). Cisco created LEAP using a modified version of the Challenge Handshake Authentication Protocol (CHAP). LEAP does not require a digital certificate. Most wireless devices support LEAP, but it is susceptible to a known attack. Cisco recommends using stronger protocols, instead of LEAP.

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

Note that PEAP, EAP-TTLS, and EAP-TLS all use digital certificates. Chapter 10 of the CompTIA Security+: Get Certified Get Ahead: SY0-401 Study Guide digs into certificates much deeper, but as an introduction, certificates help provide strong authentication and encryption services. However, a certificate authority (CA) must issue certificates, so an organization must either purchase certificates from a public CA, or implement a private CA within the network.

Remember this

Enterprise mode requires an 802.1x server. PEAP and EAP-TTLS require a certificate on the 802.1x server. EAP-TLS also uses TLS, but it requires certificates on both the 802.1x server and each of the clients. LEAP is proprietary to Cisco.


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 are planning a wireless network for a business. A core requirement is to ensure that the solution encrypts user credentials when users enter their usernames and passwords. Which of the following BEST meets this requirement?

A. WPA2-PSK

B. WEP over PEAP

C. WPS with LEAP

D. WPA2 over EAP-TTLS

Answer is D. Wi-Fi Protected Access II (WPA2) over Extensible Authentication Protocol (EAP)-Tunneled Transport Layer Security (EAP-TTLS) is the best solution from the available answers. Because users must enter their usernames and passwords, an 802.1x solution is required. Using EAP-TTLS with an 802.1x solution ensures the credentials are encrypted.

WPA2-preshared key (PSK) does not authenticate users based on their usernames.

Wired Equivalent Privacy (WEP) is not recommended for use even with Protected EAP (PEAP).

Wi-Fi Protected Setup (WPS) is a standard designed to simplify the setup of a wireless network, but it does not implement usernames, and Cisco recommends using stronger protocols rather than Lightweight EAP (LEAP).

See Chapter 4 of the CompTIA Security+: Get Certified Get Ahead: SY0-401 Study Guide for more information on security protocols.

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.