Open the slides on one screen, and Wireshark (a packet sniffer) on the other. Watch the theoretical packets in the slides become real ones on your screen. That is when networking finally clicks .
This is the layer most system admins care about. It’s all about getting a packet from Amsterdam to New York. Computer Networks Tanenbaum Slides
These are structured as direct, dense bullet points covering the key topics of each chapter—ideal for creating your own PowerPoint/Google Slides or for study notes. Open the slides on one screen, and Wireshark
Important issues:
The slides visualize how a packet is wrapped in a header at each layer, like an envelope inside an envelope, and stripped back down at the destination. This is the layer most system admins care about
The network layer provides host-to-host packet delivery across multiple links. Key abstractions are logical addressing (IP), forwarding (per-hop decision based on forwarding tables), and routing (distributed algorithms to build those tables).
