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...What does network layer do end to deliver packet from application sending receiving hosts hop transport by thru data link physical a wide concern involves every router host in the compare between two over directly connecting or more physically csci plane part segment on side encapsulates segments into datagrams rcving delivers protocols examines header fields all ip passing through it functions addressing globally unique address for each routable device logical unlike mac as you ll see later assigned operator need map routing building of which path use forward packets src dest forwarding delivery input port appropriate output and depend service models datagram vs virtual circuit key move s analogy process planning determine route trip source taken getting single algorithms interchange control logic local per function determines how is routed arriving among routers along forwarded destination approaches traditional...