Wavelength is a measure of the distance that a signal's energy can travel in the time it takes for one cycle of the signal to occur. It is calculated by dividing the speed of light by the frequency of the signal. Wavelength is generally expressed in meters (m).
Question 2
What is a Data Center?
Options:
A.
A building or portion of a building whose primary function is to research new data.
B.
A room in a building dedicated to monitoring data and information.
C.
A building or a portion of a building whose primary function is to house a computer room and its related support areas
D.
A building or a portion of a building where debugging takes place
Answer:
C
Explanation:
Explanation:
A building or a portion of a building whose primary function is to house a computer room and its related support areas. A Data Center is a secure, temperature-controlled environment that houses computer systems, equipment, and associated components. It is typically used to store, process, and distribute large amounts of data and information. Data Centers typically include server racks, storage arrays, network switches, firewalls, and other components necessary for the operation of computer systems.
Question 3
Which one of the following is a Physical Security Device?
Options:
A.
Access Key
B.
Contactless smart card
C.
Token card
D.
Fiber optic cable
Answer:
B
Explanation:
Explanation:
A contactless smart card is a physical security device that uses radio frequency identification (RFID) technology to identify and authenticate an individual. This type of card is used in a variety of applications, such as access control systems and digital payment systems. It is also used in physical access control systems, where the card is used to unlock doors or grant access to restricted areas. Contactless smart cards are also used in building access systems, where the card is used to grant access to certain areas of the building.