Why does Blockchain comes under Distributed Ledger Technology instead of being merely a replicated database

Question

I believe in distributed ledger , data shared between multiple hosts and each host store some part of data while in blockchain each host replicate and store exact updated copy of records. If this is true then why in blokchain , distributed database terminology excessively used?

Answer 1

1. Data in a database is generally subject to CRUD operations. Blockchains are Immutable (unalterable). Modifying records in a Blockchain defeats its purpose. Modifying records in a replicated database is required.

2. Blockchain is called a distributed ledger because a ledger cannot be altered. An accountant in a business cannot just alter records in the company ledger, as its illegal. Blockchain is the same way, except records cannot be altered because of reliance on the consensus algorithm, that is, SHA-256.