Chapter 19 - Data Security

Chapter 19 - Data Security

1. Describe two main threats to data security on the internet

   • 1.Attacks from viruses or spyware attached to emails 2. unauthorised external access from programmers/hackers.

2. Describe suitable backup and recovery for realtime application(6)

   • An RAID is used, an exact copy called a mirror image of all the data/ transactions that happen recorded simultaneously When failure data is instant switch over to backup system

3. 4 activities in an audit trail

   • 1. The identity of logged on users 2. the times theyre logged on 3. the terminal theyre logged on to 4. the unseccessful attempts to log onto an account

4. Describe back and recovery for batch processing (6)

   • A complete bvackup were all data files are backed up, incremental backup is suitable. A master data should be copied before batch takes place. Master data should be copied back from backup copy and all batch transactions done again

5. Why need disastor recovery plan (4)

   • To ensure they can keep working after natural disastor, ensure critical data has been identifed, ensure key funtions/personnel are identified and have alternative location to work from

6. Why does company not allow use of USB pens

   • So the owners cannot install software/load files so network security cannot be bypassed Reduces the risk of network being infected eith accidently or on purpose