1. 瘦客户端：
瘦客户端是在基于服务器的计算环境中运行的计算机系统。它们通过连接到基于远程服务器的环境来工作，大多数应用程序和数据都存储在该环境中。服务器执行大部分任务，如计算和计算。在安全威胁方面，它们比胖客户端系统更安全。在瘦客户端中，由于有集中式服务器，系统管理要容易得多。在中心化的帮助下，有硬件的优化，软件的维护也比较容易。
2. 胖客户端：
胖客户端是一种即使没有网络也可以连接到服务器的系统。胖客户端也称为重客户端或胖客户端。胖客户端不依赖于服务器的应用程序。他们有自己的操作系统和软件应用程序。它们具有高灵活性和高服务器容量。胖客户端具有更多的安全威胁，但安全性低于瘦客户端。
瘦客户端和胖客户端的区别：
| S.NO. | Factors | Thin clients: | Thick clients: | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Installation | Thin clients have browser based installation. | Thick clients are installed locally. | ||||||||||||
| 2. | Type of devices | Thin clients are used by handheld devices. | Customization systems use thick clients. | ||||||||||||
| 3. | Processing Type | In thin clients there is complete processing on server side. | Thick clients make use of computer resources more than server. | ||||||||||||
| 4. | Deployability | Thin clients are easily deployable as compared to thick clients. | Thick clients are more expensive to deploy. | ||||||||||||
| 5. | Data validation | The data verification is required from the server side. | The data verification is done by client side. | 6. | Communication | In thin clients continuous communication is required from server side. | In thick clients communication is done at particular intervals with the server. | 7. | Interfacing | It cannot be interfaced with other equipment. | It is robust as compared to thin client and it can be interfaced with other equipment. | 8. | Security | It has less security threats. | It has more security threats as compared to thin clients. |