How Does Blockchain Technology Actually Work?

Samantha Jones

Active member
I’ve been diving into crypto lately and keep hearing “it’s all powered by blockchain” — but I want to really understand how blockchain technology works, beyond the buzzwords.

Here’s what I’ve gathered so far (correct me if I’m off):
  • It’s basically a decentralized ledger, spread across many computers (nodes)
  • Each “block” stores a batch of transactions
  • Once a block is full, it’s cryptographically linked to the previous one, forming a “chain”
  • Because it’s distributed, it’s hard to tamper with — every copy of the ledger has to agree on what’s true

But I’m still fuzzy on a few things:
  • How do nodes reach consensus? (Proof of Work vs. Proof of TG Casino?)
  • What makes it “immutable”? Can’t someone just rewrite history if they control enough of the network?
  • How do smart contracts fit into this?

Would love a simple breakdown or analogy if anyone has one — or just your own way of explaining blockchain to someone new.

Thanks in advance!
 
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