1.1 Hardware and communication 0.0 / 5 ? ComputingCommunication and networkingHardware componentsASOther Created by: declan disleyCreated on: 20-04-17 12:10 Hardware describes all the physical, electronic and mechanical components forming part of a computer system. 1 of 25 Control Unit manages the fetch, decode, execute cycle 2 of 25 ALU (Arithmetic logic unit) processes and manipulates data which consists of arithmetic operations or logical comparisons. Allows decisions to be made 3 of 25 Registers is a temporary data store but not in main memory e.g. MAR, MDR, CIR 4 of 25 Cache memory cache memory can be accessed by a CPU more quickly than it can access regular RAM to execute frequently accessed items of code (e.g. loops) 5 of 25 Bus connects the internal components of a computer, such as CPU and memory, to the motherboard 6 of 25 RAM (Random access memory) temporary store that contains programs or data currently in use 7 of 25 Parallel processing is the simultaneous use of several processors to perform a single task 8 of 25 Program Counter (PC) points to the next instruction to be fetched and executed 9 of 25 Memory address register (MAR) holds the address of the currently addressed memory location 10 of 25 Memory data register (MDR) holds the code read from the currently addressed memory location 11 of 25 Current instruction register (CIR) holds the most recently fetched machine code instruction 12 of 25 Fragmentation files are split up and stored on different parts of the disc. It will slow down disc access speed. 13 of 25 Defragmentation file parts are physically re-arranged on disc and is needed occasionally to speed up file access. 14 of 25 Network a network is a linked set of computer systems, which may be capable of sharing computer power and resources such as printers and databases. 15 of 25 Protocol is a standard set of rules that allow devices to communicate with each other 16 of 25 HTTP (Hypertext transfer protocol) allows the transfer of multimedia webpages over the Internet 17 of 25 FTP (File transfer protocol) allows the transfer of large files over a network 18 of 25 SMTP (Simple message transfer protocol) allows emails to be sent over a network 19 of 25 TCP/IP (Transmission control protocol/internet protocol) allows any networked computers to communicate with each other 20 of 25 IMAP (Instant message access protocol) allows emails to be transferred between computer systems (via the Internet) 21 of 25 DHCP (Dynamic host communication protocol) assigns unique addresses to devices on a network 22 of 25 UDP (Unique datagram protocol) sends datagrams across a network with very few error recovery services 23 of 25 Handshaking handshaking is the process that establishes if a device is ready to communicate 24 of 25 Internet is a (world-wide) networked information and communication system freely available via any connected computer/device 25 of 25
Comments
No comments have yet been made