Are all the below strategies for IPSec to work accross NAT same??NAT - TNAT transparencyTransparent NATTransparent TunnellIPSEC Pass throughWhat's the difference between them? Do we have any more of these?Why so many ?

What is the difference between Port forwarding, port range forwarding, PAM?Can these also be achieved by PAT?

What is the essential difference between the two(except one is from netForensics (OEM) and one's from Protego networks)?On what basis a selection amongst the two products shall be made on a real deployment?

What are these partitions, how do they differ??a) Application Partitionb) Recovery Partitionc) System Images.