This is a custom HTTP profile which optimizes HTTP traffic for a Wide Area Network environment with KeepAlives and Compression (no Caching).
It enables compression buffer with settings to enable fast compression of all data, and inclusion of some data that typically would not be compressed.
With OneConnect transformations enabled, LTM transforms "Connection: Close" headers in client-side requests to "X-Cnection: Close" headers on the server side, allowing the BIG-IP LTM to make eligible for connection reuse any client requests containing the "Connection: Close" header (i.e. HTTP/1.0 requests).
(This profile is included as a standard profile in LTM 9.4.)