Core Networking Concepts Module Guide
Follow Packet Pete as one leak alarm must preserve a local warning and a truthful remote update.

One leak alarm has two needed results.

Keep the nearby warning active during a link break.

Trace each hop to the remote screen.

Reject an old screen value as current.
Start With the Module
This guide maps the current learning path for Core Networking Concepts. The module contains 37 chapters, linked below in the order learners can study them.
Chapters by Part
Network Basics
- 2 Devices, Packets, and Layers
- 3 OSI and TCP/IP Models
- 4 Encapsulation and PDUs
- 5 IoT Protocol Layers and Selection
- 6 Data Representation in Networks
- 7 Datagrams and Packet Structure
- 8 Packet Switching and Performance
- 9 Converged Networks and QoS
- 10 MAC Protocols: Sharing the Channel
- 11 IPv4 Addressing Fundamentals
- 12 Subnetting and CIDR for IoT Networks
- 13 Port Numbers and NAT for IoT
- 14 IPv6 for IoT
- 15 DHCP and Address Resolution
- 16 Layered Models: Knowledge Checks
- 17 Packet Journey Game: Forwarding Decisions
- 18 Packet Journey Game: Diagnostic Traces
- 19 Quick Check: Message Paths and Diagnostic Evidence
- 20 Network Basics: Knowledge Checks
Radio Propagation
Wired & Physical Layer
- 28 Wired Communication Fundamentals
- 29 UART and RS-232 Protocols
- 30 I2C: Transactions and Bus Design
- 31 I2C: Bring-Up and Diagnosis
- 32 SPI Protocol
- 33 Ethernet: Links and Standard Selection
- 34 Ethernet: PoE and Operations
- 35 Wi-Fi Access: Standards and Link Budget
- 36 Wi-Fi Access: Scanning and Deployment
- 37 Wide-Area Access: LPWAN and Cellular
- 38 Choosing the Right Network Type
Choose a Starting Point
If this subject is new, follow the parts and chapters in the order shown above. If you already have a specific design or troubleshooting question, use the relevant part heading and open the direct chapter link whose title matches that question.
Use the sidebar and site search for supporting material; use this chapter map as your main route through the module.
How to Use This Material
- Start with the first chapter in the relevant part when the topic is unfamiliar.
- Use direct chapter links for study plans, lab preparation, and review evidence.
