Rinkeby is another Ethereum-based test network that uses PoA as its consensus mechanism. PoW and PoA are different mechanisms for building consensus among miners. PoW is robust enough to maintain immutability and decentralization of data; however, it has drawbacks in not having enough control over miners. PoA, on the other hand, has all the benefits of PoW along with having more control over the miners.
Rinkeby
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