[Crypto Q&R] What transaction parameter protects Ethereum from denial of service attacks?

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In the Ethereum blockchain, the blocks all have a gas limit. One of the benefits of a block gas limit is it prevents attackers from creating an infinite transaction loop, but if the gas usage of a transaction exceeds this limit, the transaction will fail. This can lead to a DoS attack in a couple different ways.

Ethereum Smart Contract Security Best Practices. ... If you use mutexes to protect against reentrancy, you will need to carefully ensure that

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Nice

where i can know?