DCD meaning in Computer and Networking ?

Answer:

What is Data Carrier Detect mean?

Data Carrier Detect, abbreviated as DCD, or alternately Carrier Detect abbreviated as CD, is a control signal present inside an RS-232 serial communications cable that goes between a computer and another device, such as a modem. This signal is a simple "high/low" status bit that is sent "from DCE to DTE", or in a typical scenario, from the peripheral to the computer. It is present on virtually all PC serial ports - pin 1 of a nine-pin (DE9) serial port, or pin 8 over a 25-pin (DB25) port. Its purpose varies depending on the device connected, but the most typical meaning is to indicate when a modem is connected to another remote modem via telephone lines.

The word "carrier" is a reference to the analog carrier signal generated by a modem, which is modulated to carry the data. On a data modem, loss of the carrier equates to termination of the connection.

Much like the Ring Indicator signal, on a PC's serial port, changes to the DCD signal state can generate a hardware interrupt that can be captured by the processor any time the DCD signal changes state, preventing the PC from needing to constantly poll the pin.

reference

Full Form	Category
Dcd Media	Business
First Asset Diversified Convertible Debenture Fund	Business
Double Competence Development	Community
Department of City Development	Community
Department of Community Development	Community
Department of Conservation and Development	Community
Data Carrier Detect	Computer and Networking
Data Compiler And Decompiler	Computing
Data Center Dynamics	Computing
Data Carrier Detected	Computing
Drivers Cd	Computing
Direct Cd	Computing
Dual Core Design	Computing
Digital Currency Daily	Cryptocurrency
Database Connection Details	Database Management
Duty Cycle Distortion	Electronics
Direct Current Demagnetization (as Opposed To Alternating Current)	Electronics
Dual Coil Drive	General
Deception Cruelty Deviousness	General
Dutch Corpse Diplomatique	General
Dispersion Concentration Destination	General
Device Charger Detection	General
The D Completion Daemon	General
Diversified Cabinet Distributors	General
Digital Communications Division	General
Delta Charlie Delta	General
Dance Create Discover	General
Dual Cartridge Dispensers	General
Different Connected Dia	General
Data Content Description	General
Doctor Of Communications Design	General
Deputy Construction Director	General
Document Content Description	General
Design Cost Data	General
Digital Core Design	General
D Completion Daemon	General
Dead Can Dance	General
Device Control Device	General
Dedham Country Day	General
Design Control Document	General
Dual Clutch Drive	General
Dynamic Cylinder Deactivation	General
Delco Chassis Division	General
Design Create Deliver	General
Dual Cab Device	General
Double Crossover Diamond	General
Daf Club Deutschland	General
Displacement Conscious Damping	General
Delorean Club Deutschland	General
Dongfeng Chaoyang Diesel	General
Dragracing Club Denmark	General
District Court D C	Governmental
Developmental Coordination Disorder	Medical
Donation After Cardiac Death	Medical
Dark Cell Degeneration	Medical
Developmental Cognitive Disorder	Medical
Diploma in Chest Disease	Medical
Disorders of Cortical Development	Medical
Developmental Cognitive Disability	Medical
Donor after Cardiac Death	Medical
Disability Compensation Division	Medical
Developmental Cognitive Disabilities	Medical
Director (or Ate) of Combat Developments	Military and Defence
Data Collection Device	Military and Defence
Design Class Diagram	Softwares