AAA:Authentication Authorization Accounting,认证、授权、计费
ADS:Aggregate Directory Services,聚合目录服务
AH:Authentication Header,分组头认证
AI:Artificial Intelligence,人工智能
AIT:Artificial Intelligence Terminal,人工智能终端
APNIC:Asia-Pacific Network Information Center,亚太网络信息中心
ARP:Address Resolution Protocol,地址解析协议。关联词:RARP
ARPANET:Advanced Research Project Agency NETwork,ARPA网
ARQ:Automatic Retransmission Request,自动请求重传
AS:Autonomous System,自治系统
ASP:Application Service Provider,应用业务供应商
AUI:Attachment Unit Interface,接入单元接口