Writing
Networking
How the wire, the frame and the packet actually behave, and why every tool you run depends on it.
4 posts
Network cabling: copper, fibre, Cat standards, RJ45 and SFP
Twisted pair against fibre, what Cat5e, Cat6 and Cat6A each support, why Cat6e is not a standard, and how link speed differs from Power over Ethernet.
FundamentalsCabling
The OSI model and the TCP/IP model, layer by layer
All seven OSI layers and the four TCP/IP layers side by side, how they map onto each other, and how encapsulation turns data into a frame on the wire.
FundamentalsOSI model
Network topologies: bus, star, ring, mesh, tree and hybrid
What a network topology is, how the seven common ones are wired, and exactly what happens to each when a single link or the central device fails.
FundamentalsTopology
What a network is, and how bandwidth, throughput, latency and jitter differ
PAN, LAN, CAN, MAN and WAN explained at each scale, what bandwidth, throughput, latency and jitter each measure, and what a single real ping run shows.
FundamentalsARPANET