past paper questions Flashcards
function of utility software
converting files
2 items von neumann proposed to store in main memory
data
instructions
part fo the CPU that semds signals to other components
control unit
advantages of wireless connectcivity
easy to add new device by giving SSID and password
no cable in the way
people can move around without disconnecting
penetration testing
when networks are put under deliberate attack in oder to identify weaknesses
checks carried out during a code review
ineffiecient code
logic errors
security vulnerabilities
how a router directs data on the internet
Reads data to find the address
Has physical connections to at least 2 different networks
Holds a routing table
Stores information about IP
Forwards data
latency
the amount of time between data being sent and data being recieved
how firewall works
monitors traffic using a set of rules to decide if data is allowed or not
name of email protocol
POP3
example of low level language
assembly language
characteristic of low-level language
- each line is 1 instruction only
- CPU specific so they can manipulate hardware directly
how data is stored on optical media
laser burns disk which creates pits representing binary
how to convert binary to two’s complement
flip all the bits and add 1
ASCII
a standard for representing characters
