b.3.4 networking protocols & the tcp ip stack
Learn the language of the internet. Dive into the TCP/IP stack to see how strict rules and layers ensure that an email sent from London arrives perfectly in Tokyo.
Computers are fussy. If they don't agree on the rules, they refuse to talk. These rules are called Protocols. We explore the famous TCP/IP Stack, a 4-layer model that runs the entire internet. It’s like a pass-the-parcel game where data is wrapped in layers of envelopes (Encapsulation). The top layer writes the message (HTTP), the next layer ensures it arrives safely (TCP), the next adds the address (IP), and the bottom layer physically sends it (Ethernet). Understanding this stack is the key to understanding how the digital world functions.
🧐 Sorry, I looked and there is nothing to see.
Networking protocols and the TCP/IP stack form the invisible, rule-based infrastructure that allows disparate systems to communicate globally. This progression maps the pedagogical journey from a basic understanding of communication rules in Key Stage 2, through to a deep, analytical mastery of packet encapsulation, addressing, and diagnostic analysis at Key Stage 5 and beyond. By tightly pairing abstract protocol theory with practical command-line investigation and packet sniffing, students move beyond rote memorisation of acronyms to become proficient in diagnosing and evaluating real-world network traffic.
Last modified: March 20th, 2026
