IBM data server client and driver enhancements
Some IBM data server clients and drivers have been enhanced with new and improved features that improve application performance and reliability.
To successfully use Db2 11.5 features, you must upgrade to a 11.5 IBM® data server client or driver.
In general, you can use Db2 11.5, 11.1, and 10.5 clients and drivers for running applications, developing applications, and performing database administration tasks on Db2 11.5. Likewise, you can use 11.5 clients and drivers for running applications, developing applications, and performing administrative tasks on Db2, 11.1 and 10.5 servers. However, the functionality available can differ based on the combination of the version levels that are used on the server and client (or driver).