An administrator needs to selectively compress HTTP traffic based on geographical location. Which FS Feature should the administrator use?

OneConnect is a BIG-IP connection-pooling feature that reuses server-side TCP connections - it provides no conditional logic or geolocation awareness for compression decisions.

iRules is F5's Tcl-based scripting language that executes in response to traffic events. An administrator can use the built-in IP geolocation lookup within an iRule to determine a client's region and then selectively enable or skip HTTP compression using the COMPRESS::enable or COMPRESS::disable commands, providing precise geographic control that static profiles cannot offer.

The SPDY profile enables the SPDY multiplexing protocol for client connections and has no mechanism for making compression decisions based on geographic location.

iSessions is an F5 APM feature for secure remote access tunneling and is unrelated to HTTP compression or geolocation-based traffic policies.