Packet delivery on a Ethernet Wire

This maybe a stupid question would appreciate if someone can clearify:

Are Ethernet packets delivered serially on the physcial medium ie copper or
fibre - one after another in one single file or line if you will. Or are
they delivered in parallel ie. two or more packets can be in transmission
along each other in parallel.

Also when you enable queueing on Router/switch. Does this only effect the
behaviour of how the router treats the packet on the inbound or outbound
interface or does it also effect the behaviour of the packet when it is
actually in transit on the wire itself.

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Received on Wed Jul 27 2011 - 08:48:02 ART