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Amazon virtual private cloud (VPC) allows the users to use AWS resources in a customized virtual network. The users can customize their virtual netwroking environment

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Components

• VPC CIDR Block
• Subnet
• Gatewats
  • Internet Gateway: Internet is allowed (one/two way)
  • NA Gateway: Request sent should be recieved by machine not anything else (from http/https)
• Routing
• Network Access Control Lists
• Security Groups
  • Firewalls (what IP to allowed and what not)
    • Ex: Disable SSH keys

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Except VPC Bearing and NAT Gateway, everthing related to VPC is free

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Featrues

• Store data in S3 and set permissions such that the cata can only be accessed from within Amazon VPC
• Attach one or more elastic IP addresses to any instance VPC so it can be reached directly from the internet.
  • 1$ if used
  • 10$ if not used / month
• Privately connect to other AWS services
• Bridge VPC and onsite IT infrastructure

VPC and Subnet Sizing

• 10.0.0.0 Network Address
• 10.0.0.1 VPC Router (Gateway)