Physical security involves protecting personnel, hardware, programs, networks, and data from events that could cause serious losses or damage. Threats include interruption of services, theft, physical damage, unauthorized disclosure, and loss of system integrity. Physical security planning uses a layered defense model with layers at the perimeter moving inward toward assets, including deterrence, delaying, detection, assessment, and response. Perimeter security can be provided by access control, physical barriers, intrusion detection, assessment, response, and deterrents. Security personnel play a central role administering electronic access control, responding to alarms, monitoring video, and more.

1. Physical security

2. INTRODUCTION
Physical security is the protection of personnel, hardware,
programs, networks, and data from physical circumstances
and events that could cause serious losses or damage to an
enterprise, agency, or institution...

3. Introduction (continue)
Threats to physical security include:
- Interruption of services
- Theft
- Physical damage
- Unauthorized disclosure
- Loss of system integrity

4. Physical Security Planning
- Physical security, like general information
security, should be based on a layered defense
model.
- Layers are implemented at the perimeter and
moving toward an asset.
- Layers include: Deterrence, Delaying, Detection,
Assessment, Response

5. Perimeter Security
Protection services can be provided by:
- Access Control Mechanisms
- Physical Barriers
- Intrusion Detection
- Assessment
- Response
- Deterrents

6. Security personnel
Security personnel play a central role in all layers of
security ,Security personnel perform many functions as:
- administer electronic access control
- respond to alarms
- monitor and analyze video

7. sources
-http://en.wikipedia.org/wiki/Physical_security
-http://searchsecurity.techtarget.com/definition/phy
security-sical
--security/what-http://www.police.psu.edu/physical
security.cfm-physical-is