paper 1 mock Flashcards
why might having a dual core instead of a single core improve the performance of a computer?
- dual core is 2 processors
- which means each processor can execute a separate instruction at the same time
how does cache size affect the performance of a CPU? 2
- cache stores frequently accessed instructions
- that can be accessed faster than accessing them from ram
so more cache improves performance of ram
give three ways to make use of file management
- can open files
- can delete files
- can move files
(search for files, rename files)
how does compression software compress image files (4)
- uses an algorithm
- to remove repeated or unnecessary data
- could use lossy or lossless
- lossy means original file will not be restored
- lossless means original file will be restored
what issues could arise from unauthorised access to someone’s laptop 3
- malware can be put on computer
- files can be deleted
- data can be stolen
two ways to prevent unauthorised access to laptops
- strong password
- no access without password. use multiple cases etc
- firewall
- stop unauthorised transmissions of packets
how does encryption work to protect documents?
- uses an algorithm
- to scramble data
- so if it is accessed it can not be understood
on a star network, what must be drawn
switch
what is the role of the switch
uses mac address
receives data packets
directs data packets to computers within lan
why does introducing wireless access slow down a network?
- wireless transmission is slow than cabled
- wireless can be limited by interference such as walls that disrupt signal
what is a virtual network
non physical network
employees can access server from any location
describe the relationship between the url, ip address and server (5)
- website has ip address
- url sent to DNS
- URL has linked IP
- DNS finds IP
- IP address sent back to computer
why is releasing a game under a proprietary license more appropriate than open source? (2)
- she can sell it for a fee
- copyrights her source code
- so it can’t be modified
explain why home networks use peer to peer instead of client server 3
- no server
- it is decentralised
- computers are connected directly to eachother
how does defragmentation quicken how files are accessed 2
less physical movement saves time
- when one page is read it doesn’t have to search for second
is ethernet a protocol
yes
what is the purpose of utility systems software
performs maintenance tasks
what does the internal secondary storage store
- files
- operating system
