Doubt in networklayer

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Special Forums IP Networking Doubt in networklayer
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Old 03-26-2014
Originally Posted by baker
great , now i am getting to it ..

but my understanding was , from transport to network layer , the only data that passing is TCPheader+data , and in this IP address is not available though.
The layers are inside each other, like a Matryoshka. The data link layer doesn't understand the Transport Layer data, but it's there nonetheless.

You might consider a packet to be a wad of data which looks like this:
Data Link Layer(usually Ethernet)
Network Layer
Transport Layer
It usually gets passed around whole. OSI might speak of peeling layers but that's a metaphor; if it's a signal going over a wire, it's going to be transmitted whole.

Last edited by Corona688; 03-26-2014 at 01:49 PM..
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