Computing revision

Computing revision

1. Virus types

   • Virus
   • Zombie
     • DDOS and email spam
   • Trojan horse
     • Pretends to be a positive program but is a malicious software.
   • Worm

2. Anti malware protocals

   • Qurantine
   • Deleting the malware
   • Firewalls to stop unauthorised data packets
   • Encryption and Decryption
     • A key is required to decryption a encrypted piece of data

3. CPU

   • central processing unit
   • Processes instructions
   • Fetch-decode-execute cycle
     • fetches data from the RAM and processes it before executing the action

4. LAN