Computer Science · Oct / Nov 2016 · Paper 12 · Question 9

Any two from:

– a large number of requests are sent to the network/server all at once – designed to flood a network/server with useless traffic/requests – the network/server will come to a halt/stop trying to deal with all the traffic/requests – prevents users from gaining access to a website/server [2]

1 mark for each security threat and 1 mark for matching description Security threat Description Viruses – software that replicates – causes loss/corruption of data // computer may “crash”/run slow Hacking/cracking – illegal/ unauthorised access to a system/data Phishing – a link/attachment sends user to fake website (where personal data may be obtained) Pharming – malicious code installed on user’s hard drive / computer – user is redirected to a fake website (where personal data may be obtained) Spyware/key logger – send/relay key strokes to a third party [4]