How does Datapower provides Acceleration and Flexibility? (105/285 technotes for 2015)

Acceleration - 

Datapower consumes messages in the network speed, and can remove the WS-Security overhead and pass the clear message to back-end server and vice versa.

Felxibility - 

1. Datapower supports more of WS-Security than of any Application Server - maybe Websphere will catchup the near future, but as of now they have a complete coverage.
2. Datapower fundamentally includes XSL processing engine - which helps in easy Transformation of messages.
3. By offloading the WS-Security processing to Datapower, we eliminate the need to configure and re-configure the back end server.

Example of Datapower usecase:

1. Client who want to use WS-Security but find that their Application Server, does not fully support this, should evaluate Datapower.
2. Clients expecting to frequently change WS-Security settings, 
3. Clients with problematic messages.