Wireless Security

Question 1

Defense against digital dark arts
Video link: https://youtu.be/Ug5DZcF2NvY


What are some of the weaknesses of the WEP scheme? Check all that apply. 

1 / 1 point

Its use of ASCII characters for passphrases 

Its use of the RC4 stream cipher 

Correct

You nailed it! The RC4 stream cipher had a number of design flaws and weaknesses. WEP also used a small IV value, causing frequent IV reuse. Lastly, the way that the encryption keys were generated was insecure.

Its poor key generation methods

Correct

You nailed it! The RC4 stream cipher had a number of design flaws and weaknesses. WEP also used a small IV value, causing frequent IV reuse. Lastly, the way that the encryption keys were generated was insecure.

Its small IV pool size 

Correct

You nailed it! The RC4 stream cipher had a number of design flaws and weaknesses. WEP also used a small IV value, causing frequent IV reuse. Lastly, the way that the encryption keys were generated was insecure.

Question 2

What symmetric encryption algorithm does WPA2 use? 

1 / 1 point

DES

AES

DSA

RSA

Correct

Great work! WPA2 uses CCMP. This utilizes AES in counter mode, which turns a block cipher into a stream cipher.

Question 3

How can you reduce the likelihood of WPS brute-force attacks? Check all that apply. 

1 / 1 point

Implement lockout periods for incorrect attempts.

Correct

Exactly! Ideally, you should disable WPS entirely if you can. If you need to use it, then you should use a lockout period to block connection attempts after a number of incorrect ones.

Disable WPS.

Correct

Exactly! Ideally, you should disable WPS entirely if you can. If you need to use it, then you should use a lockout period to block connection attempts after a number of incorrect ones.

Use a very long and complex passphrase.

Update firewall rules.

Question 4

Select the most secure WiFi security configuration from below: 

1 / 1 point

None

WEP 128 bit

WPA2 personal

WPA enterprise

WPA2 enterprise

WPA personal

Correct

Exactly right! WPA2 Enterprise would offer the highest level of security for a WiFi network. It offers the best encryption options for protecting data from eavesdropping third parties, and does not suffer from the manageability or authentication issues that WPA2 Personal has with a shared key mechanism. WPA2 Enterprise used with TLS certificates for authentication is one of the best solutions available.

Comments

Rectangular Microstrip Patch Antenna

Microstrip is a type of electrical transmission line which can be fabricated using printed circuit board technology, and is used to convey microwave-frequency signals. It consists of a conducting strip separated from a ground plane by a dielectric layer known as the substrate. The most commonly employed microstrip antenna is a rectangular patch which looks like a truncated microstrip transmission line. It is approximately of one-half wavelength long. When air is used as the dielectric substrate, the length of the rectangular microstrip antenna is approximately one-half of a free-space wavelength . As the antenna is loaded with a dielectric as its substrate, the length of the antenna decreases as the relative dielectric constant of the substrate increases. The resonant length of the antenna is slightly shorter because of the extended electric "fringing fields" which increase the electrical length of the antenna slightly. An early model of the microst...

Prepare Data for Exploration : weekly challenge 1

Prepare Data for Exploration : weekly challenge 1 #coursera #exploration #weekly #challenge 1 #cybersecurity #coursera #quiz #solution #network Are you prepared to increase your data exploration abilities? The goal of Coursera's Week 1 challenge, "Prepare Data for Exploration," is to provide you the skills and resources you need to turn unprocessed data into insightful information. With the knowledge you'll gain from this course, you can ensure that your data is organised, clean, and ready for analysis. Data preparation is one of the most important processes in any data analysis effort. Inaccurate results and flawed conclusions might emerge from poorly prepared data. You may prepare your data for exploration with Coursera's Weekly Challenge 1. You'll discover industry best practises and insider advice. #answers #questions #flashcard 1 . Question 1 What is the most likely reason that a data analyst would use historical data instead of gathering new data? 1 / 1...

Cracking Passwords Using John the Ripper: A Complete Step-by-Step Guide

Cracking Passwords Using John the Ripper: A Complete Step-by-Step Guide In today's post, we’re diving into a practical lab exercise that shows how to use John the Ripper, one of the most effective password-cracking tools in cybersecurity. Whether you're an IT professional or a cybersecurity student, mastering John the Ripper will help you understand password vulnerabilities and enhance your penetration testing skills. Lab Objective: The goal of this lab is to crack the root password on a Linux system (Support) and extract the password from a password-protected ZIP file (located on IT-Laptop). Both tasks are performed using John the Ripper. Steps to Crack the Root Password on Support: Open the Terminal on the Support system. Change directories to /usr/share/john . List the files and open password.lst to view common password guesses. Use John the Ripper to crack the root password by running john /etc/shadow . Once cracked, the password is stored in the john.pot file for future u...

Stream of Knowledge

Search This Blog