unit 1 Flashcards
(51 cards)
what are the components of a processor
cpu, alu, registers, control unit, input output devices, control, data and address bus
what does the alu do
responsible for calculations and logic operations
what does the control unit do
sends control signals to the rest of the computer
what are the registers
program counter
MAR
CIR
ACC
MDR
what does the program counter do
stores the address of the next instructions to be executed
What do the MAR and MDR do
the MAR contains the address of the instruction or data to be fetched
the MDR stores said address
what does the CIR do
instruction is copied here for executing
what does the ACC do
the result of calculations is stored in the ACC
what does cache do
acts as the middle man between the memory and processor
what are the levels of cache and what do they do
level 1 - cache is fast but small
level 2 - higher capacity than 1but slower
level 3 - improves the performance of level 1 and level 2
what is parallel processing
multiple core processing within a computer
what is the fde cycle
instruction from the MAR to the MDR
copied to the ALU
sent to control unit for executing
what is a magnetic storage devices
fast transfer rate + access time
HDD have read write heads
what is an optical drive
use lasers to store data in pits and troughs
what is a client server model
one control computer
multiple connected
what is the five layer model
application layer
transport layer
network layer
datalink layer
physical layer
what are the protocols in the application layer
HTTP, HTTPS, FTP
what are the protocols in the transport layer
TCP and UDP
what are the protocols in the network layer
IP
what does the HTTP do
allows resources to be transmitted over a network
what does the FTP do
used when copying a file from one location to another via the internet
what does SMTP do
internet standard for email transmission
uses TCP
mail servers use SMTP to send and receive mail messages
what does IMAP do
transferring emails between computer systems via the internet
what does DHCP
dynamic host configuration protocol
assigning dynamic IP addresses to devices on a network
