2. Subnet - AWS - Private subnet

Fill out the form and click “Create”

• VPC ID: Select the AWS VPC we just created ⇒ This will ensure the Subnet belongs to the VPC.
• Subnet name: AWS - Private subnet
• Availability Zone (AZ): us-east-1a ⇒ Each Subnet will be tied to a single AZ, ensuring high availability.
• IPv4 VPC CIDR block: Select our VPC - AWS ⇒ Subnets must have CIDR blocks within the VPC’s CIDR range.
• IPv4 Subnet CIDR block: 10.10.1.0/24 ⇒ Resources in this subnet (e.g: EC2) will have IP ranging from 10.10.1.0 to 10.10.1.255/24 (256 IPs as displayed, but only 251 usable). Breakdown:
  • Total IPs in 10.10.1.0/24: 256 IPs (from 10.10.1.0 to 10.10.1.255)
  • AWS reserved IPs: 5 IP addresses
    • 10.10.1.0: Network address
    • 10.10.1.1: Reserved for the VPC router
    • 10.10.1.2: Reserved for AWS DNS (or for future use)
    • 10.10.1.3: Reserved for future use
    • 10.10.1.255: Broadcast address (not used in AWS but still reserved)

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