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Backups follow the three-two-one rule: keep at least three copies of the data, store them on two different types of media, and place one copy off site. Following that pattern protects against hardware failure, accidental deletion, and ransomware alike.

A blockchain is fundamentally a distributed ledger. Transactions are grouped into blocks, and each block is cryptographically linked to the one before it, which makes historical records extremely difficult to alter after the fact. Instead of a single administrator holding write access, the ledger is replicated across many independent nodes, and every transfer must be agreed upon by the network's consensus rules before it becomes final.

A content delivery network places cached copies of static assets on servers in many geographic locations, bringing them closer to visitors. For sites with heavy images, video, or stylesheets, a CDN can noticeably reduce the time it takes for the first screen to render.

Crypto wallets fall into two broad categories: custodial and non-custodial. A custodial wallet is operated by a service that holds the private keys on the user's behalf, which is convenient but requires trusting that operator. A non-custodial wallet returns control of the keys to the user, which removes counterparty risk but also means that a lost recovery phrase cannot be restored by anyone.

Privacy protection and regulatory compliance exist in constant tension. Regulators require platforms to identify customers in order to deter money laundering, while users prefer to limit how much personal data is collected and retained. Finding a workable balance between those goals remains an ongoing policy debate.