OCR H446 1.3.3: Networks
The free BugBot lessons that teach this point, a robot to try it on, and the past-paper questions that test it.
Lessons that teach it
- A12.1 Communication methods Networks and the web
Serial and parallel, synchronous and asynchronous, baud rate, bit rate, bandwidth, latency and protocols. - A12.2 Topologies and wireless networks Networks and the web
Physical and logical bus and star; Wi-Fi, SSIDs, WPA2 and CSMA/CA with RTS/CTS. - A12.3 How the Internet works Networks and the web
Packet switching, routers and gateways, URLs, fully qualified domain names and DNS. - A12.4 The TCP/IP stack and protocols Networks and the web
The four layers, encapsulation, ports and sockets, and HTTP, HTTPS, FTP, SMTP, POP3 and SSH. - A12.7 Internet security Networks and the web
Firewalls, packet filtering, proxies and stateful inspection; encryption, certificates and signatures; worms, trojans and viruses. - A12.8 Client server, REST and thin clients Networks and the web
Peer to peer and client server, websockets, CRUD and REST with JSON, and thin versus thick clients. - A12.10 Project: a reliable link Networks and the web
Receive a route as packets out of order, reject the damaged one, and drive it.
Try it on a robot
The task from A12.1 Communication methods, running here. Change the program and press Run.
The specification is OCR's own document; this page says which of our lessons teach point 1.3.3 and is not endorsed by the board.