A). Create a new subnet with a larger CIDR block: This increases the pool of private IP addresses available within the subnet, but it doesn,t reserve specific public IPs for future use.B. Enable public IP auto-assignment for your VNICs: This automatically assigns dynamic public IPs to your instances, which is the opposite of reserving them.C. Configure a NAT Gateway with additional public IP addresses: This allows multiple instances to share a single public IP for outbound traffic, but it doesn,t reserve specific IPs for future use.Reserving public IP addresses from a Public IP Pool is the most common way to ensure specific IP addresses are available for future use. Most cloud providers offer this functionality, and the specific steps may vary slightly depending on the provider. However, the general process typically involves:
Accessing the Public IP Pool management interface: This is usually found within the networking section of your cloud provider,s console or API.
Selecting the desired number of IP addresses: Specify the number of public IPs you want to reserve.
Choosing a specific IP range (optional): In some cases, you may be able to choose a specific range of IP addresses from within the available pool.
Setting the IP addresses to "Reserved": This marks the selected IPs as unavailable for automatic assignment and ensures they are kept for your future use.