Is TCP/IP encapsulation MSB or LSB?

Posted by Justin on Server Fault See other posts from Server Fault or by Justin
Published on 2012-10-19T08:57:48Z Indexed on 2012/10/19 11:07 UTC
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Filed under:

ip

|

tcp

|

ethernet

Application data sent over TCP experiences multiple encapsulations:

The application data is encapsulated within one or many TCP fragments
The TCP fragment is encapsulated within one or many IP datagrams
The IP datagram is encapsulated within one or many Ethernet frames

It turns out Ethernet frames are sent most-significant byte first, and within each byte, most-significant bit first. What about the multiple encapsulations? Are they performed MSB first or LSB first?

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