| Abbreviation | Definition |
|---|---|
| DE | Discard Eligible |
| DEA | Digital Exchange Access |
| DECCO | DEfense Commercial Communications Office |
| DEN | Directory Enabled Networking |
| DENIM | Directory Enabled Network Infrastructure Model |
| DES | Data Encryption Standard |
| DF | Data Frame |
| DFD | Displaced Frame Difference |
| DFN | Dedicated Frogans Network |
| DFNC | Distributed-Fountain Network Code |
| DFS | Dynamic Frequency Selection |
| DFTR | Dual Flit Transmission Rate |
| DG | Default Gateway |
| DGA | Domain Generation Algorithum |
| DGI | Dos Gateway Interface |
| DGM | Digital Group Multiplexing |
| DGNA | Dynamic Group Number Assignment |
| DHAAD | Dynamic Home Agent Address Discovery |
| DHCP | Dynamic Host Configuration Protocol |
| DHCP. | Dynamic Host Configuration Protocol |