Understanding Block And Block Header In Blockchain Training Ppt

Slide 1

This slide provides an overview of the structure of blockchain, covering the key components such as block, chain, and network.

Instructor’s Notes:

The structure of blockchain is similar to that of linked lists or binary trees in which the linking is done using pointers that point to the previous or next list element on the nodes in the linked list.

The three major parts of blockchain are:

• Block: It contains the list of transactions recorded into a ledger over a time period. For every blockchain, the size, period, and triggering event varies
• Chain: Chain is a hash that glues multiple blocks together in the blockchain and enables trust creation. In the blockchain, the SHA-256 (Secure Hash Algorithm) hashing algorithm is primarily used
• Distributed Network: The network consists of multiple nodes across the globe to achieve the decentralized structure of the blockchain. Each node will contain the complete record of all transactions which have been carried out in the blockchain

Slide 2

The purpose of this slide is to highlight the key components of a block in the blockchain, which are data, hash, and previous hash. The slide also includes details of timestamp and genesis block.

Instructor’s Notes:

The key components of a block in blockchain are as follows:

• Data: The record of all the transactions. Each block of a blockchain can contain thousands of transaction data. The type of data stored depends upon the use case of blockchain
• Hash: The hash is like a block fingerprint as it helps identify the block and its content. A hash is always unique for each block
• Previous Hash: As the name suggests, it contains the hash information of the preceding block. Its primary function is to create the chain of blocks and make blockchain secure
• Genesis Block: The first block created for any blockchain with the previous hash as “0” is the genesis block
• Timestamp: A timestamp is a date-time value that is stored in a block. It provides information about the time when the block was created. In the blockchain, this value is in the form of a Unix timestamp format

Slide 3

This slide represents the key fields of block in blockchain such as block header, block size, transaction counter and transactions. It also contains information pertaining to field size and content description.

Slide 4

This slide includes the segments of block header such as block version, previous block hash, Merkle root, timestamp, nonce, and difficulty target.