Network Security

Network Security

1. When using a standalone computer security is fairly straight forward

   • Password, keyboard lock, screensaver etc
   • When part of a network it is more complex

2. Large Number of workstations gives greater risk of abuse, particularly if network can be remotely accessed

3. Illegal access to the network could be catastrophic for the company

4. Corporate security is required at appropriate level with a disciplinary procedure to back it up

5. Viruses and illegal software spread faster over a network especially if all machines have DVD drives, USB ports, internet access and email

6. Preserving Security

   • Physical Controls
     • Limit access to equipment
     • restrict unauthorised personnel
   • Software
     • Restrict access to resources
     • Assign read only access/ read/edit or read/ write/ delete/ edit
   • Username and Password
     • Allocated so others cannot access their files
     • Avoid use of obvious options

7. Protecting Networks against Illegal Access

   • Firewall
     • Only authorised data passes in and out through it
     • Stops access of incoming viruses
   • Data Encryption
     • Scrambling or coding data
     • Only visable to people authorised to see it and have the key
     • Ensures data is useful to anyone unauthorised to see it