Once you submit a transaction, which, in our example, includes a new vehicle asset, then the transaction and underlying data is broadcast to all active nodes on the network. The broadcast is provided by the network layer, and uses the peer-to-peer protocol to broadcast the data to the connected nodes. A peer can also relay transactions to other sidechains, so each part of the world can have its own local blockchain network.
However, the entire network would still be connected through these relay peers, as shown in the following map:
World map showing three separate blockchain networks connected to each using ...
