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Why IPv6?
Pros
More suitable for higher density (futuristically 2 orders of magnitude larger than traditional networks)
Statelessness mandated
No NAT necessary (adds extra cost to the cost prohibitive WSN)
Possibility of adding innovative techniques such as location aware addressing
Cons
Larger address width (Having efficient address compression schemes may alleviate this con)
Complying to IPv6 node requirements (IPSec is mandated)

PPT Version