CST3607 Class Notes 2021-02-04

News and Tools

SolarWinds Hack!!!! (A must know)

M.E.Doc Backdoor & Maersk NotPetya Recovery

Other news

News and Tools

Disable UPnP (Universal Plug-and-Play) on Your Network

Identity Theft is a big problem.

Protecting Your Accounts and Identity from Theft

  • Slides and notes from the presentation I did at WordCamp NYC

Resume Privacy

  • If you’re going to post, or have posted, your resume on-line, that is publicly accessible, make sure to edit it to remove your address and phone number.

Password Managers

Credit Freezes Are Now Fee-Free

Protocol Review:

Two Factor Authentication (2FA) / Multi-factor Authentication (MFA)

What is a network?

Unicast, Broadcast, Multicast

The Internet Protocol and other network addressing systems recognize three main addressing methodologies:

  • Unicast addressing uses a one-to-one association between the destination address and the network endpoint: each destination address uniquely identifies a single receiver endpoint.
  • Broadcast addressing uses a one-to-many association, datagrams are routed from a single sender to all endpoints, in the broadcast domain, simultaneously in a single transmission. The network automatically replicates datagrams as needed for all network segments (links) that contain an eligible receiver.
  • Multicast addressing is the sending of the same message simultaneously to to multiple endpoints simultaneously in a single transmission, but not to all. The network automatically replicates datagrams as needed for all network segments (links) that contain an eligible receiver.

Collision and Broadcast Domains

Telemetry

Telemetry is an automated communications process by which measurements and other data are collected at remote or inaccessible points and transmitted to receiving equipment for monitoring.

Read / Watch

CCNA Certification Study Guide, Volume 2: Exam 200-301

  • Read Chapter 2: TCP/IP
  • Do the Written Labs
  • Answer the Review Questions
    • Do not submit your answers for this chapter. The answers are in the Appendix

Subnetting Tutorial & Reference Page

Do

Check if your router has UPnP, or any other ports/protocols, exposed to the Internet

  • Go to GRC.com > Services Menu > ShieldsUP!
  • Run GRC’s Instant UPnP Exposure Test
  • Run GRC’s “All Service Ports Test
  • Report your results at our next class:
    • Was UPnP exposed to the public?
    • Did you find any open ports?
    • Were all port stealth?