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Background
Mobile Internet access
Drive-thru Internet
Other forms of (ad-hoc) mobile & nomadic usage
Existing applications and their requirements

Simple observations
(Mobile) users are likely behind NATs
Mobile users likely have changing IP addresses
Ignoring mobile IP for a moment
Users may be behind firewalls
In many (present) applications the mobile users is the active party
Forwarding should support opportunistic “polling”
PPT Version