| A | B |
|---|
| AAA | Authentication Authorization and Accounting |
| ACL | Access Control List |
| ADF | Automatic Document Feeder |
| ADSL | Asymmetric Digital Subscriber Line |
| AH | Authentication Header |
| AM | Amplitude Modulation |
| AMI | Alternate Mark Inversion |
| APIPA | Automatic Private Internet Protocol Addressing |
| ARP | Address Resolution Protocol |
| ATM | Asynchronous Transfer Mode |
| BDF | Building Distribution Frame |
| BERT | Bit-Error Rate Test |
| BGP | Border Gateway Protocol |
| BNC | British Naval Connector/Bayonet Niell-Concelman |
| BootP | Boot Protocol/Bootstrap Protocol |
| BRI | Basic Rate Interface |
| CHAP | Challenge Handshake Authentication Protocol |
| CIDR | Classless Inter-Domain Routing |
| CNAME | Canonical Name |
| CRAM-MD5 | Challenge-Response Authentication Mechanism - Message Digest 5 |
