They define two types of drivers: optimistic and defensive.
他们把司机分为两类：乐观型和防御型。
Let's start by comparing two types of drivers that are available.
首先让我们来比较现有的两种驱动程序。
Because of the native code, their portability is limited. DB2 UDB provides two types of drivers in this category.
由于有本机代码，它们的可移植性受到了限制。
应用推荐