Packets¶
Basic Structure¶
As the header structure varies as using different version of TCP, we shall let it be some Bytes and let the protocol itself to decode.
TCP Header¶
All TCP packets obey these rules
- Source Port
- Destination Port
- Sequence Number
- Acknowledgment
- ...(page 89)
Layer 3¶
When TCP packet going down to layer 3 (IP layer), some extra information will be added before TCP header.
( http://en.wikipedia.org/wiki/IPv4 )->Header
Note
Research router packet manipulation between Layers 2 and 3
Layer 2 and Layer 1¶
We don’t need to worry about them.