| Abbreviation | Definition |
|---|---|
| EAP | Enterprise Architecture Planning |
| EAP-FAST | Extensible Authentication Protocol-Flexible Authentication via Secure Tunneling |
| EAPM | External Application Protocol Module |
| EAPOL | Extensible Authentication Protocol Over LAN |
| EAPS | Ethernet Automatic Protection Switching |
| EARL | Enhanced Address Recognition Logic |
| EAT | Event Action Table |
| EB | Enhanced Bandwidth |
| EB | Extra Bandwidth |
| EC2 | Elastic Computing Cloud |
| ECC | Elliptic Curve Cryptography |
| ECD | Early Congestion Detection |
| ECDSA | Elliptic Curve Digital Signature Algorithm |
| ECG | Electrionic Communication Gateway |
| ECMP | Equal-Cost Multi-Path |
| ECN | Electronic Communication Network |
| ECN | ETAC Collaboration Network |
| ECN | Explicit Congestion Notification |
| ECO | Embedded Communication Object |
| ECO | Exchange Client Object |