This week moved from introductory security concepts into lower-layer network protections and practical attack-defense thinking.

Completed this week

  • Continued wargame practice with Bandit or Natas.
  • Studied physical layer and data link layer attacks and defenses.
  • Worked on a vulnerability analysis assignment related to Layer 2 protections.
  • Added module vocabulary through the glossary activity.

Projects

Layer 2 Security Vulnerability Analysis

Focus: Data Link Layer / Defensive Controls

Summary: Reviewed how lower-layer network protections can reduce exposure to common network threats.

What I learned: Security is not only an application-layer concern; weaknesses lower in the stack can affect the whole environment.

Layer 1 and Layer 2 Security Discussion

Focus: Physical and Data Link Layer Defense

Summary: Compared attack and defense ideas across the first two OSI layers.

What I learned: Effective defense requires matching controls to the layer where the risk appears.

Wargame Practice

Focus: Enumeration / Command-Line Practice

Summary: Continued solving security exercises through a wargame environment.

What I learned: Repetition helps build a more reliable workflow for investigating systems.

Currently learning

  • Physical layer threats and controls
  • Data link layer protections
  • Vulnerability analysis structure
  • Wargame enumeration habits
  • Clear security writing

Biggest takeaway

The biggest takeaway this week was that network defenses need to be layered. Even basic infrastructure choices can influence whether later security controls are effective.

Next focus

  • Review IP addressing and subnetting.
  • Practice more command-line security exercises.
  • Connect network-layer concepts to realistic defensive planning.