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nadams 2017-04-24 13:53:39 -07:00
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@ -17,7 +17,7 @@ Bitcoin's P2P network architecture is much more than a topology choice. Bitcoin
.A bitcoin network node with all four functions: wallet, miner, full blockchain database, and network routing .A bitcoin network node with all four functions: wallet, miner, full blockchain database, and network routing
image::images/mbc2_0801.png["FullNodeReferenceClient_Small"] image::images/mbc2_0801.png["FullNodeReferenceClient_Small"]
All nodes include the routing function to participate in the network and might include other functionality. All nodes validate and propagate transactions and blocks, and discover and maintain connections to peers. In the full-node example in <<full_node_reference>>, the routing function is indicated by an orange circle named "Network Routing Node", or with the letter "N". All nodes include the routing function to participate in the network and might include other functionality. All nodes validate and propagate transactions and blocks, and discover and maintain connections to peers. In the full-node example in <<full_node_reference>>, the routing function is indicated by an orange circle named "Network Routing Node" or with the letter "N".
Some nodes, called full nodes, also maintain a complete and up-to-date copy of the blockchain. Full nodes can autonomously and authoritatively verify any transaction without external reference. Some nodes maintain only a subset of the blockchain and verify transactions using a method called((("simplified payment verification (SPV) nodes","defined"))) _simplified payment verification_, or SPV. These nodes are known as SPV or lightweight nodes. In the full-node example in the figure, the full-node blockchain database function is indicated by a blue circle named "Full Blockchain" or the letter "B". In <<bitcoin_network>>, SPV nodes are drawn without the blue circle, showing that they do not have a full copy of the blockchain. Some nodes, called full nodes, also maintain a complete and up-to-date copy of the blockchain. Full nodes can autonomously and authoritatively verify any transaction without external reference. Some nodes maintain only a subset of the blockchain and verify transactions using a method called((("simplified payment verification (SPV) nodes","defined"))) _simplified payment verification_, or SPV. These nodes are known as SPV or lightweight nodes. In the full-node example in the figure, the full-node blockchain database function is indicated by a blue circle named "Full Blockchain" or the letter "B". In <<bitcoin_network>>, SPV nodes are drawn without the blue circle, showing that they do not have a full copy of the blockchain.