This is the layer most system admins care about. It’s all about getting a packet from Amsterdam to New York.
Privately owned networks within a single building or campus. MAN (Metropolitan Area Network): Computer Networks Tanenbaum Slides
: Addresses routing (how packets get from source to destination) using algorithms like Link State and Distance Vector, along with critical protocols like IPv4, IPv6, and SDN (Software Defined Networking). This is the layer most system admins care about
Always ensure that the slides match your edition. The 4th edition (2002) has no coverage of 5G, IoT (Internet of Things), or QUIC (Quick UDP Internet Connections), whereas the 5th and upcoming 6th editions do. MAN (Metropolitan Area Network): : Addresses routing (how
Networking is notoriously difficult to teach because it involves abstract concepts happening simultaneously. Tanenbaum’s slides shine brightest when explaining the . The slides use consistent, clear diagrams to show how data travels down the stack (encapsulation) and back up (decapsulation). If you struggle to understand how a Transport Layer relates to the Network Layer, these slides provide the clearest visual roadmap available.
The physical layer encodes bits into signals for transmission over media (copper, fiber, wireless). Signal characteristics—bandwidth, attenuation, noise, and interference—determine raw bit rates and error characteristics. Shannon’s channel capacity bounds provide theoretical limits on achievable rates given signal-to-noise ratio.