Hi,

   Thanks a lot for your explanation.

   I have further questions regarding  Block Chain.

   As per explanation about Block Chain,

A block chain is a transaction database shared by all nodes participating in a system based on the Bitcoin protocol. A full copy of a currency's block chain contains every transaction ever executed in the currency. With this information, one can find out how much value belonged to each address at any point in history.



  1) Since block Chain is a transaction database, will it be stored in all the nodes of the network i.e. all the computors of the Minors ?
 
  2) Is there any limit on transactions duration i.e since which date the transcations will be stored in a computor. If it is going to store  all the transaction for a longer period, what about the disk space of that transaction.

  3) If anybody's ( Minor's ) PC is switched off for some time, how the transactions will be synched once it is on?

  Another basic question is, since the bitcoin Network is functioning by only Minors and since the existence of all Minors in the network is optional, how the Bitcoin Network was started initially?

 Could someone can spare some time to explain this.


Thanks & Regards