About the nonce value of the Ethereum account (External Account & contract account)

Brief introduction

The nonce value exists primarily because it is account-based and differs from the Utxo-based bitcoin. Nonce values are primarily used to prevent replay attacks. An external account is sent a nonce plus one per transaction. Each contract account creates a nonce plus one. The value of the nonce is the same as when the contract calls the other contract for internal invocation. the number of rules used in a nonce when the nonce is too small (less than the nonce value previously used in the transaction), the trade is rejected outright. When the nonce is too large, the trade is in the queue, which is why the problem we described above, when sending a larger nonce value, and then the nonce to start the nonce to that value, then the transaction can still be executed. When the transaction is in the queue and the Geth client is stopped, the trade in the queue is cleared. a deeper understanding