One-sentence answer
A node runs Bitcoin rules on its own device, independently checks transactions and blocks, and exchanges valid data with peers.AT A GLANCE · EXPAND A STEP
01Receive data
Peers send transactions and blocks.
02Verify locally
Receiving is not trusting; check local rules.
03Store and relay
Process data that passes checks.
This diagram explains relationships, not the complete protocol implementation.
A node performs three basic jobs
It receives data from peers, checks that data against local rules, and relays valid information. A full node also keeps enough data to independently derive the current state from history.
Running a node is not logging into a company account. It is operating software whose rules you choose.
A node is not a mining machine
Mining hardware performs vast numbers of hashes to compete for blocks; check whether blocks are valid. A person can run a node without mining or operate miners connected to a node.
Verification is much cheaper than producing , allowing ordinary hardware to supervise the rules.
Going offline does not erase balances
An offline node temporarily stops receiving updates. When it returns, it requests missing blocks from peers and verifies them itself. The network does not depend on one central server remaining online.
Real availability depends on connectivity, bandwidth, software compatibility, and a valid chain—not merely a count of online .
TRY IT YOURSELF
Where can a message still travel?
Reachable: 8 / 8 · An offline origin cannot send. Click numbered nodes to toggle them.
Propagation depends on paths, not a majority of online nodes. Nodes verify rules independently; receiving a message is not a confirmation.
Teaching limits: message propagation along paths, not confirmations, consensus, or real peer discovery.
Open standalone experimentCHECK YOUR UNDERSTANDING
Should a node blindly trust a block received from a peer?
A correct answer saves local progress. No account needed.View my learning pathThree things to remember
- ✓Nodes receive, verify, and relay data.
- ✓Miners produce work; nodes verify the result.
- ✓Node count alone does not describe network health.
A common follow-up
Is a phone wallet a full node?
Many phone wallets save storage and bandwidth by using lightweight verification or third-party services. Whether one is a full node depends on its implementation.
Primary sources
Primary sources
These links lead to protocol material, developer documentation, or open-source code—not trading services.