# 核心NATS

所谓的“核心 NATS”是 NATS 服务基础设施提供的基本功能和服务质量集，其中没有任何“nats-server”实例配置为启用 JetStream。

“核心 NATS”功能是发布/订阅，具有基于主题的寻址和队列，以及“最多一次”服务质量。


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