It depends what the person does ! They could do something as smple as printing out a few pages of information for use by a competitor - to planting a virus that destroys everything stored on the hard-drive.
It may install code that compromises the security of the computer and the activity and information of those authorized to use it.
Physical access restrictions
security management
Computers permit easy access to large volumes of data?
It means that if you are not authorized, you cannot go to a certain spot if it says so.
That's called a firewall.
A clever or expert programmer who can gain unauthorized access to other computers
Security officer
Unauthorized access is the use of a computer or network without permission. Unauthorized use is the use of a computer or its data for unapproved or possibly illegal activities.
People that attempt to gain unauthorized access to a computer or called crackers. There is a difference between a cracker and a hacker and the terms are often mistaken or used interchangeably. A cracker is one who is trying to cause harm or gain unauthorized information. A hacker is some one that attempts to break into computers and software for the purpose of fixing or discovering security holes to prevent crackers from getting in.
Computer Fraud & Abuse Act
breach
A firewall is a device made to either allow or deny transmissions from other computers (particularly from the Internet) to protect the computer from unauthorized access. A firewall is necessary because, as was said, it blocks unauthorized access by hackers and disallows any files that may contain harmful data like viruses and malware.
firewall
breach
Breach
I believe you mean "unauthorized user'. An authenticated user will be able to access data and information on other networked computers on the network if the permissions allow them to. An non-authenticated user has no access, and no permissions to do so. I understand what you mean, and the answer to that is FALSE.
Physical access restrictions