| Abbreviation | Definition |
|---|---|
| FCS | Frame Check Sum |
| FCT | Flow Completion Time |
| FDDI | Fiber Distributed Data Interface |
| FDF | File Data Format |
| FDQ | Fair Distributed Queue |
| FDS | Free Dedicated Server |
| FE | Field Engineer |
| FEAD | Fast Electronic Application Distribution |
| FEC | Fast Ethernet Controller |
| FEC | Forwarding Equivalence Class |
| FECN | Forward Explicit Congestion Notification |
| FEI | File Exchange Interface |
| FENG | Financial Executives Networking Group |
| FERF | Far End Receive Failure |
| FESN | Far East Skate Network |
| FESN | Florida Emergency Supplier Network |
| FFFB | Fabulous Furry Freak Brothers |
| FHA | Framing Header Attachment |
| FHSS | Frequency Hopping Spread Spectrum |
| FIB | Forwarding Information Base |