domain id

Data overhead of each packet & domain ID size

Hi

I have two questions;

1- What is the data overhead of DDS Connext v 5.2.0? I read a document about it (https://www.rti.com/hubfs/docs/DDS_Over_Low_Bandwidth.pdf) which said it is 56 byte. But I'm wondering where the dynamic data and dynamic type of every packet are stored. I think they definitely need more space.

2- Is it possible to increase domain ID size? It's 8 bits (0 to 232 plus reserved IDs) (For example increase it to a 16 bits word)

Thanks in advance for your answer :)

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