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New York University: Network Security - Protocols

Learn more fundamentals of network security, including cryptographic algorithms used in networking protocols, TLS/SSL, IPSec Layer 2 Security and Wireless Security.

Network Security - Protocols
5 weeks
8–10 hours per week
Progress at your own speed

About this course

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This course will soon be retired. Last day to enroll is 12/31/2022 at 00:00 UTC.

This is the 5th course in the intermediate, undergraduate-level offering that makes up the larger Cybersecurity Fundamentals MicroBachelors Program. We recommend taking them in order, unless you have a background in these areas already and feel comfortable skipping ahead.

  1. Information Security - Introduction to Information Security
  2. Information Security - Authentication and Access Control
  3. Information Security - Advanced Topics
  4. Network Security - Introduction to Network Security
  5. Network Security - Protocols
  6. Network Security - Advanced Topics
  7. Penetration Testing - Discovering Vulnerabilities
  8. Penetration Testing - Exploitation
  9. Penetration Testing - Post Exploitation

These topics build upon the learnings that are taught in the introductory-level Computer Science Fundamentals MicroBachelors program, offered by the same instructor.

This is a self-paced course that provides a continuation of network security topics. Among the topics covered are cryptographic algorithms used in networking protocols, TLS/SSL, IPSec Layer 2 Security, and Wireless Security. The material is essential in later classes that will develop ethical hacking skills. Students are provided with a broad understanding of cryptography, from its classical applications dating from the Roman empire to modern cryptography, including the public key cryptography and hashing techniques today. Next, we take what we learned about cryptography and apply it as a tool against attackers. Specifically, we'll discuss IP Security, TLS/SSL, and its use in Virtual Private Networks. We follow up with coverage of Layer 2 security and vulnerabilities, such as MAC attacks, VLAN hopping attacks, DHCP attacks, ARP attacks, spoofing attacks, and attacks on other protocols. We'll also go over common countermeasures to these attacks. We conclude the course with an overview of how WiFi works, basic terminology and architecture, and how wireless networks are secured.

Industry Certification Preparation
This program covers much of the material that is assessed on the CompTIA’s Security+ certification exam. Upon program completion, verified track learners will receive a 36% discount code for the CompTIA Security+ exam.

At a glance

  • Language: English
  • Video Transcript: English
  • Associated skills: Internet Protocol Security (IP SEC), Public Key Cryptography, Wireless Networks, Ethical Hacking, CompTIA Security+, Computer Science, Virtual Private Networks (VPN), Cyber Security, Network Security, Spoofing Attack, Address Resolution Protocols, Algorithms, Authentications, VLAN Hopping, Wireless Security, Cryptography, Transport Layer Security (TLS), Dynamic Host Configuration Protocol (DHCP), Network Protocols, Access Controls, Penetration Testing

What you'll learn

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  1. Define and apply a substitution cipher
  2. Define cryptanalysis
  3. Explain at a high level the process by which a plaintext message is encrypted, transmitted, and decrypted.
  4. Describe at least two strategies for breaking an encryption scheme
  5. Identify the differences between public key encryption, symmetric key encryption, and hashing
  6. List and summarize the characteristics of good ciphers
  7. Describe the vulnerabilities of stream ciphers
  8. Define AES and explain why it is recommended over 3DES
  9. Define cipher block chaining
  10. List the steps in creating an RSA public/private key pair
  11. Explain why RSA is secure
  12. Define message integrity and explain how it is ensured
  13. Define IPSec and list its services
  14. Define authentication header and ESP
  15. Explain the primary goal of IKE and describe its sub-protocols
  16. Summarize the five steps of IPSec Operation
  17. Summarize the history of SSL
  18. Explain how closure alerts can prevent a truncation attack
  19. Identify the protocols that make up the SSL architecture
  20. Describe how SSL/TLS provides protected channels
  21. State the differences between IPSec and SSL VPN connections
  22. Explain why it's important to consider Layer 2 security
  23. Define common Layer 2 attacks
  24. Identify tools used in Layer 2 attacks
  25. Describe countermeasures to Layer 2 attacks and security best practices to prevent attacks
  26. Explain the differences between the 2.4GHz and 5GHz spectrums
  27. Provide definitions of basic wireless terms
  28. Explain how 802.11ac differs from earlier 802.11 standards
  29. Identify and define the types of 802.11 frames
  30. List and define the states of 802.11 sessions
  31. List the steps in establishing an 802.11 session
  32. Summarize the existing wireless security protocols and state which protocols should not be used
  33. Summarize WPA, WPA Enterprise, and generalized WiFi attacks

Week 1 - Cryptography

Week 2 - TLS/SSL and IPSec

Week 3 - Layer 2 Security

Week 4 - Wireless Security

Week 5 - Final Exam

Who can take this course?

Unfortunately, learners residing in one or more of the following countries or regions will not be able to register for this course: Iran, Cuba and the Crimea region of Ukraine. While edX has sought licenses from the U.S. Office of Foreign Assets Control (OFAC) to offer our courses to learners in these countries and regions, the licenses we have received are not broad enough to allow us to offer this course in all locations. edX truly regrets that U.S. sanctions prevent us from offering all of our courses to everyone, no matter where they live.

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