Conversation so far:
What is blockchain?
A blockchain, originally block chain, is a growing list of records, called blocks, that are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data.
What problem does blockchain solve?
Blockchain technology solves the Byzantine General's Problem using a proof-of-work consensus algorithm
How does blockchain work?
A Blockchain is a type of diary or spreadsheet containing information about transactions. Each transaction generates a hash

Question: What are the types of networks
Self-contained rewrite: What are the types of blockchain networks?