Test net environment is a slightly modified version of the live blockchain network which retains all the essential characteristics. It is a valuable tool which will empower developers, allowing them to easily test their code. Each blockchain technology has a network supported by a number of nodes, machines which effectively run a program, but at the same time they also make a copy of the database, which is known as the blockchain data (transactions ledger).
The network is composed of minimum 2–3 nodes, but it can be much larger, 100000 nodes, and the network can encompass more than 1 million computers. All the computers present in the network are called nodes, and every node which supports the network or is part of the network is composed of a program and a copy of the blockchain that acts as a database. The program has many functions, for example, it can synchronize with the other nodes in such a way to create a database that is always updated.
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