2.1
Packet Structure Trainer
How data is split into packets — the header, payload and trailer, and what each carries.
The Learning Hub/Topic 2
📡 Topic 2
Data Transmission
Five interactive trainers take you from packet structure to encryption. Each one teaches the idea, lets you drill it, then tests you — work through them in order or jump to the skill you need.
2.2
Packet Switching Trainer
How packets travel a network via routers and nodes, and why they can arrive out of order.
2.3
Error Detection Trainer
Parity checks, checksums and echo checks for transmitted data, ARQ, and check digits for data entry.
2.4
Transmission Methods Trainer
Serial vs parallel, and simplex, half-duplex and full-duplex — and when each is used.
2.5
Encryption Trainer
Symmetric and asymmetric encryption — keys, plaintext and ciphertext, and how data stays secure.
📚 Want the written theory too? Read the Topic 2 lessons in the Knowledge Library, then come back to train.