Definition ∞ Linear sequence blocks refer to the traditional structure of a blockchain, where new blocks are added one after another in a single, unbroken chain. Each block contains a hash reference to the preceding block, establishing a chronological and immutable order of transactions. This sequential arrangement provides a clear history of all network activities. It is a fundamental characteristic of many established distributed ledgers.
Context ∞ While linear sequence blocks offer strong ordering guarantees and simplicity, they often present scalability limitations due to their sequential processing nature. Discussions frequently contrast this model with alternative data structures like Directed Acyclic Graphs (DAGs) that permit parallel transaction processing. Efforts to enhance throughput within linear block structures often involve layer-two solutions or increased block size parameters.
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