Verification Code

In order to confirm the identity of the person entering an account, a verification code is given to a different device. It's used for two-factor authentication.

Pair

Exchange cryptocurrencies with each other, like the trading pair BTC/ETH.
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Mainnet

A mainnet is a separate blockchain that operates on its own network using its own protocol and technologies.
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Testnet

An alternative blockchain used by developers for testing.
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