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01 Network Fundamentals

The foundation layer. Before attacking or defending a network, you need to understand how data is framed, addressed, switched, and routed. This subcategory covers the models and mechanisms that every other networking topic builds on.

Scope​

  • The OSI and TCP/IP models, encapsulation, PDUs.
  • Ethernet framing, MAC addressing, switching, VLANs.
  • IP addressing (IPv4 and IPv6), subnetting, CIDR.
  • Network topologies (physical and logical).

Files​

#FileFormat
01OSI and TCP-IPTwo-track
02Ethernet and SwitchingTwo-track
03IP Addressing and SubnettingTwo-track
04Network TopologiesTwo-track

All four files in this subcategory are published.

Format​

Two-track (Offensive / Defensive). See the category README for the full skeleton.

  • 02 Routing and Switching - how the routed and switched paths are built and attacked.
  • 04 Network Protocols - the protocols that run on top of this foundation.

Certification Alignment​

  • Network+: Networking Concepts (OSI model, encapsulation, IP addressing, ports and protocols).
  • CCNA: Network Fundamentals (OSI model, TCP/IP stack, IPv4/IPv6 addressing, subnetting, Ethernet switching).

The full mapping is in ../CERTIFICATIONS.md.

References​