If you do not enable connection pooling,

Managed File Transfer

creates a connection for each file transfer.

When you enable connection pooling,

Managed File Transfer

checks for existing connections and uses them for the transfer of files. Based on the connection pooling configuration, if the number of active connections exceeds the maximum active connections allowed in a connection pool,

Managed File Transfer

creates a connection for the file transfer. If the number of idle connections, exceeds the maximum limit of idle connections, then

Managed File Transfer

removes the unused connections.