Unit 4 network and

Unit 4 network and

1. Network threats

   • Malware
     • viruses infect computers. They replicate their code in other programs. They infect other computers. They harm the computer by deleting, corrupting or modifying files
     • worms: replicates itself in order to spread to other computers. They might cause no damage to the attacked computers. They slow down networks and computers
     • Trojan horses: They have a program, game or cracked file which is something the user wants. They have negative program code which causes damage, takes control, or provides access to the computer
     • ransomware: Holds a computer hostage by locking or encrypting access to it
   • Exploiting vulnerabilities: unpatched software-if software updates and security updates are not installed then the software will be vulnerable Out-of-date anti-malware-isn’t regularly updated then it won’t be able to detect the latest viruses
     • Shoulder surfing
       • social engineering
         • phishing
   • Denial of service (DoS)