Ethernet Frame Structure vs IP Packet Structure

From: Abu Hamzah (hamzah.abu@gmail.com)
Date: Thu Dec 14 2006 - 07:40:21 ART

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Hi there

Just to clarify about source and destination addresses in frames and
packets.

What I've seen is that Ethernet Frame Structure has the the format:

DESTINATION MAC ADDRESS : SOURCE MAC ADDRESS -payload

i.e. the source address comes before destination address.

However, in IP Packet Structure I see the opposite - i.e. the destiantion IP
address comes AFTER source:

 SOURCE IP ADDRESS :DESTINATION IP ADDRESS -payload

Is this correct?

I'd expected to see the destination address to be first in both cases.

Is there any special reason why in IP packet the source address is first?

thanks

Abu Hamzah

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