RE: Packet delivery on a Ethernet Wire

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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Received on Wed Jul 27 2011 - 15:09:25 ART