IT & Networking
Deep dives into how networks really work — IP addressing, DNS and domains, core networking, subnetting and VLANs — from first principles to hands-on, worked examples.
Networking Fundamentals
How data moves across networks: the OSI and TCP/IP models, devices, protocols and packets — from the ground up.
IP Addressing (IPv4 & IPv6)
Everything about IP addresses: binary structure, classes, public vs private, CIDR, and the move to IPv6.
Subnetting Deep Dive
Master subnetting: masks, CIDR, network/broadcast/host math, VLSM and summarisation — with worked examples.
DNS & Domain Names
How names become addresses: the domain system, the DNS hierarchy, record types and the full resolution path.
VLANs & Switching
Segment networks with VLANs: switching, 802.1Q tagging, trunks, inter-VLAN routing and VLAN security.