| Abbreviation | Definition |
|---|---|
| IAM | Identity and Access Management |
| IAM | Initiating Address Message |
| IAN | Independent Administration Network |
| IANA | Internet Authority Number Assignment |
| IAP | International Access Point |
| IAS | Internet Authentication Server |
| IASE | Internet Authentication Service Extensions |
| IASP | Internet Access Service Provider |
| IBASE | Internet Business Applications Solutions Enabler |
| IBB | Itty Bitty Block |
| IBM | Internet Bandwidth Muliplexed |
| IBN | Informal Business Networking |
| IBN | Integrated Business Network |
| IBN | Intent Based Networking |
| IBNS | Identity Based Networking Services |
| IBP | Interrupted Bernoulli Process |
| IBTM | Ingress Buffer and Traffic Manager |
| IC | Internet Connection |
| ICAP | Internet Content Adaptation Protocol |
| ICC | Inter Client Communications |