Cambridge Advanced Level Computer Science : Unit 14 : Communication and Internet Technologies 14.1 Protocols * Show understanding of why a protocol is essential for communication between computers * Show understanding of how protocol implementation can be viewed as a stack, where each layer has its own functionality * Show understanding of the TCP / IP protocol suite * Show understanding of protocols (HTTP, FTP, POP3, IMAP, SMTP, BitTorrent) and their purposes 14.2 Circuit switching, packet switching * Show understanding of circuit switching * Show understanding of packet switching

This resource about AS - Level Computer Science - 9618. Chapter 3.1 Computers and their components *Syllabus contents Candidates should be able to: Show understanding of the need for input, output, primary memory and secondary (including removable) storage Notes and guidance Show understanding of embedded systems Including: benefits and drawbacks of embedded systems Describe the principal operations of hardware devices Including: Laser printer, 3D printer, microphone, speakers, magnetic hard disk, solid state (flash) memory, optical disc reader/writer, touchscreen, virtual headset Show understanding of the use of buffers Explain the differences between Random Access Memory (RAM) and Read Only Memory (ROM) Including their use in a range of devices and systems Explain the differences between Static RAM (SRAM) and Dynamic RAM (DRAM) Include their use in a range of devices and systems and the reasons for using one instead of the other depending on the device and its use Explain the difference between Programmable ROM (PROM), Erasable Programmable ROM (EPROM) and Electrically Erasable Programmable ROM (EEPROM) Show an understanding of monitoring and control systems Including: •• difference between monitoring and control •• use of sensors (including temperature, pressure, infra-red, sound) and actuators •• importance of feedback