A man-trap in modern physical security protocols refers to a small space having two sets of interlocking doors such that the first set of doors must close before the second set opens.
Man-trap
Fences, locks, chains, doors, walls, moats, etc. are all types of physical security.
This is homework... First step for cyber security is a good firewall. For physical security you need access control (locked doors and card entry, ect).
Doors can vary in material, size, design, and functionality. They provide privacy, security, and control of access to a space. Doors may have different types of locks and hinges for added security and ease of use.
doors, locks, windows, bombs
Locked doors, secure cabinets,etc.
Physical security measures refers to such things as locked doors or padlocks, which require a physical object in the form of a key to open them, rather than a password, which consists only of information, rather than a physical object.
Physical security measures are things that are done to reduce data theft through physical means. This does not mean, for example, installing a physical firewall (this is logical security, the prevention of data theft over the wire). Physical security means to physically secure the hardware. This may include cages, locked doors and security badges, and even padlocks on workstations to limit the ability to open the cases or remove the case from its physical location.
A security access door is a great ammenety to have in an apartment building. Crime Doctor has some great advice on security access doors as well as other great tips on making your building as safe as possible for your tenants. You can read their article at http://www.crimedoctor.com/apartment1.htm
Residential security doors are better secured than other types of doors. Residential security doors require more than a simple key to open, the doors require permission from a guard that works inside.
Physical security is having locks on your doors, security cameras in your building and security guards if needed. This can also include protection from fire, natural disasters, burglary, theft, vandalism and terrorism.
One would buy security doors to protect their home from invadors. They would also buy security doors to add an additional layer of security to their home.