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“The are many nodes around the world connecting to the Bitcoin network.”

“Run a node and help secure the bitcoin network.”

“All of the nodes reached consensus.”

Definition(s) from the Web

  1. Node is a computer that connects to Bitcoin network and uses peer-to-peer protocol that allows nodes communicating with each other within the network as well as spreading information on transactions and blocks. Information is distributed among such nodes and they are what blockchain network consists of. Source
  2. In telecommunications networks, a node is either a redistribution point or a communication endpoint. The definition of a node depends on the network and protocol layer referred to. A physical network node is an electronic device that is attached to a network, and is capable of creating, receiving, or transmitting information over a communication channel. A passive distribution point such as a distribution frame or patch panel is consequently not a node. Source
  3. If the network in question is a distributed system, the nodes are clients, servers or peers. A peer may sometimes serve as client, sometimes server. In a peer-to-peer or overlay network, nodes that actively route data for the other networked devices as well as themselves are called supernodes. Distributed systems may sometimes use virtual nodes so that the system is not oblivious to the heterogeneity of the nodes. This issue is addressed with special algorithms, like consistent hashing, as it is the case in Amazon’s Dynamo. Within a vast computer network, the individual computers on the periphery of the network, those that do not also connect other networks, and those that often connect transiently to one or more clouds are called end nodes. Typically, within the cloud computing construct, the individual user or customer computer that connects into one well-managed cloud is called an end node. Since these computers are a part of the network yet unmanaged by the cloud’s host, they present significant risks to the entire cloud. This is called the end node problem. There are several means to remedy this problem but all require instilling trust in the end node computer. Source

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