Physical, software and hardware security
Physical
hardware
Software
Physical security is basically what protects the premises and the facility of the site / data centre
Some examples of physical security are:
Security guard
Security cameras
Fence / gate
Biometric scanner, which scans things like your eyes before you can access the site
Software security is basically what protects the software inside of a computer
Some examples of software security are :
Anti-virus
Anti - malware
Firewall
NIPS (Network intrusion prevention system)
Hardware security is basically things which protect the hardware from being stolen or damaged
Some examples of this are :
Safe
Cable locks
Air conditioning, prevents the hardware / components from overheating and breaking
Hard drive shredders