Forticlient licenses are "perpetual" to fortiOS version that you are
on... For example, if you are on 5.0, forticlient license will be
perpetual while you are in 5.0... If you move to 5.2 you will lose the
license. So, you don't need renew the licens...
Sure. Are the same contend as UDP. The difference are that it need
create a session between Fortigate and ArcSight... The traffic inside
the TCP session are clear text.