In its most basic form, this architecture can be broken down into three tiers: front, mid, and database.

按照最基本的形式，这个体系结构可以分为三层：前端层、中间层和数据库层。

youdao

Consider using a database or a front end to allow users to update the whitelists and blacklists.

可以考虑使用一个数据库或者前端，以允许用户更新白名单和黑名单。

youdao

An in-memory database caching capability ACTS as a front end to a back-end database in these tiered solutions.

在这些分层解决方案中，有一个内存中的数据库缓存功能，作为后端数据库的前端。

youdao

For them a simple to deploy and manage DoS Defense system that they can put in front of their web, database, and DNS servers is ideal.

FORBES: DDoS: coming to a network near you

Front-end applications access the database to display data online.

FORBES: Oracle Cruises To $38, Database Software Still Driving The Bus

In most applications, a NoSQL database will require less up-front planning, and offer more flexibility as the application evolves.

FORBES: What You Need to Know About NoSQL Databases