What is the difference between logical security and physical security?

Logical security protects computer software by discouraging user excess by implementing user identifications, passwords, authentication, biometrics and smart cards. Physical security prevents and discourages attackers from entering a building by installing fences, alarms, cameras, security guards and dogs, electronic access control, intrusion detection and administration access controls. The difference between logical security and physical security is logical security protects access to computer systems and physical security protects the site and everything located within the site.

Logical Security is related to software and ip network security.

 

physical sycurity is related to systems like road blocker , intrusion system . CCTV etc 

The term Logical Security is colloquially used to refer to electronic measures such as permissions within the operating system or access rules at the network layers such as the firewall, routers and switches.
Physical security is traditionally used to describe controlled entry doors, video surveillance and other metaphysical measures.
The overlap between the two is ever increasing since systems which provide logical security have some physical security measures such as key lock panels on server face plates and when physical systems such as the HiD card reader for the door entry systems use a server to maintain user and card records and the ever increasing number of PC based DVR's for video surveillance cameras.