BlockChain Network With all Fake Nodes How can I know if the blockchain network is with all fake nodes.What if i create my block network with all my fake nodes to validate transactions?
-- dropping this in the answer secton, cause too many characters for comment section ---

certainly you can create your own blockchain, and create all your own fake nodes. But why would someone join your network? What is the value?

Bitcoin blockchain is currently managing ~19 billion US$, and must assure, not too many fake nodes "come in". In this case, the network is protected by +5000 other nodes, and many mining nodes to ensure proper functionality of the network. I recommend reading "https://bitcoin.org/en/how-it-works" or it's translations, especially the link to the mining section, and "Going down the rabbit hole". As this here is more a development oriented area, it might be better to discuss such question in a forum like "https://bitcointalk.org/index.php". 
Hope this helps :-)