Re: Packet delivery on a Ethernet Wire

Aaron,
copper has "pairs" because you use one wire as a reference to the other.
But there is only one signal path (each way), and it works serially.
-Carlos

Aaron Riemer @ 27/7/2011 4:09 -0300 dixit:
> Hi Irfan,
>
> I believe with copper Ethernet (100BaseTX for example) since there are
> copper "pairs" the data is sent in parallel. I would assume the only way
> parallel data transmission would work with fibre is if a different band of
> light is used (CWDM for example).
>
> Queuing on the router/switch only affects packets within the router itself
> and has no bearing on packets along the wire (unless they are dropped).
>
> Tools such as compression / LFI / DSCP marking are examples of the router
> manipulating the packets in some way before transmission out an interface.
>
> Cheers,
>
> -Aaron.
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Irfan Sid
> Sent: Wednesday, 27 July 2011 1:48 PM
> To: Cisco certification; Cisco certification
> Subject: 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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-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net