D
- DAC
See Discretionary Access Control (DAC).
- data integrity
A quality that provides a level of confidence that data won't be jeopardized and will be kept secret.
- Data Link layer
The second layer of the Open Systems Interconnection (OSI) model. It describes the physical topology of a network.
- data packet
A unit of data sent over a network. A packet includes a header, addressing information, and the data itself.
- data repository
A centralized storage location for data, such as a database.
- data source
Where data originates.
- datagram
A Layer 3, User Datagram Protocol (UDP) packet descriptor.
- DDoS attack
See distributed denial of service (DDoS) attack.
- decryption
The process of converting encrypted data back into its original form. ...
Get CompTIA Security+™: Study Guide, Fourth Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.