CP102 Lecture Notes - Lecture 12: Floppy Disk, Antivirus Software, Systems Development Life Cycle
Document Summary
Cp102 lesson 12: main categories of viruses, boot-sector viruses replicate themselves into the hard drive boot command, ensuring that the virus is loaded immediately. They can be attached to any malicious code: worms are self-replicating programs that use vulnerabilities in operating systems to travel between systems through networks to spread copies of themselves. Classifying viruses: polymorphic viruses change their own code to avoid detections they infect one certain type of file (ex. This helps to avoid detection if only the hard drive is being searched for viruses. Defences: the best defence against viruses to install antivirus software, these scan files for the signatures of viruses and thereby identifies infected files and the type of virus that is infecting them. It scans files when their opened or run. Problem/opportunity identification phase analysis phase: analysts explore the problem to be solved and develop a program specification, which is a clear statement of the goals and objectives of the project at hand.
