# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z




  • Parallel port: An I/O port that transmits data simultaneously through a parallel interface.
  • Password: A string that an individual uses together with their user ID for authentication.
  • Payroll system: A system for calculating each employee's total wages by taking into account factors such as their working hours, T&A(Time and Attendance), and taxes, and paying them the correct amount.
  • Piggybacking: One of the fraudulent authentication-based access methods where a person without permission to access a restricted zone intentionally enters said zone together with a person who has access permissions. Also called 'piggybacking' or 'piggyback,' this is one of the most typical methods of gaining unauthorized access along with a tailgating. Generally, piggybacking refers to the act of gaining unauthorized access with intent, while tailgating refers to the act of gaining unauthorized access without intent.
  • PoE(Power over Ethernet): A system that powers the device through an Ethernet cable. Because this system only requires a single cable to transfer data and supply power to the device, it is easy to install and scale, and can also reduce wiring costs.
  • Port number: The port number used for intercommunication in TCP/UDP. Its range is from 0 to 65535.
  • Private authentication: An authentication method where user authentication is performed according to the combination of credentials specified by the administrator. This method takes precedence over other authentication methods.
  • Punch: An event that indicates the start time or the end time of work.
  • Punch in: The act of recording the time of arrival at the workplace.
  • Punch out: The act of recording the time of departure from the workplace.