An air gap relates to the fact that if data can not be accessed, it can not be defiled or damaged. This is generally done in the IT sector as an indistinguishable replica of product data on a secondary storehouse system that's offline and not linked to any product or public networks. In practice, still, as long as the gap is maintained, this primary data replication is safe against assaults as well as corruption. An air gap is security prevention in which computers, computer systems, or networks aren't connected to any other networks in any way. This is employed when tight security is needed without the possibility of compromise or tragedy. It guarantees that a given system is fully insulated — electromagnetically, electrically, and, utmost crucially, physically — from other networks, particularly insecure networks. In other words, data may only be transmitted when a physical device, similar to a flash drive, external hard slice, or DVD, is connected to it.
Numerous manufacturers use this fashion to encourage consumers to make double payments, one for product and one for the air gap. The high cost of typically tackling the air gap has hindered their use.
There are three types of air gaps- grounded air gaps, backup- grounded air gaps, and object- grounded air gaps.
The expression" air gap" is just a metaphor for the internal distance created by the physical separation of computers. Air Gap shields computers from viruses, keyloggers, ransomware, and other unauthorized access.