Create a VPC Network with Multiple IP Address Ranges

B.

To create a VPC network that allows instances to have IP addresses in both the 10.1.1.0/24 network and the 172.16.45.0/24 network, the correct answer is option C: Configure an alias-IP range of 172.16.45.0/24 on the virtual instances within the VPC subnet of 10.1.1.0/24.

Here's a detailed explanation of why option C is the correct answer and why the other options are incorrect:

Option A: Configure global load balancing to point 172.16.45.0/24 to the correct instance. This option is not relevant to the question, as it suggests a solution for distributing traffic across multiple instances in different regions, rather than creating a VPC network that allows instances to have IP addresses in two different networks.

Option B: Create unique DNS records for each service that sends traffic to the desired IP address. This option also does not address the question directly. DNS records are used to map domain names to IP addresses, and while they can be used to direct traffic to specific instances, they do not create a VPC network that allows instances to have IP addresses in multiple networks.

Option D: Use VPC peering to allow traffic to route between the 10.1.0.0/24 network and the 172.16.45.0/24 network. VPC peering is a way to connect two VPC networks in the same or different regions. However, it does not allow instances within a single VPC network to have IP addresses in multiple networks. Therefore, this option is not relevant to the question.

Option C: Configure an alias-IP range of 172.16.45.0/24 on the virtual instances within the VPC subnet of 10.1.1.0/24. This option is the correct answer to the question. Alias-IP ranges allow virtual machine instances to have multiple IP addresses associated with them. In this case, an alias-IP range of 172.16.45.0/24 can be added to the instances within the VPC subnet of 10.1.1.0/24. This will allow instances in the 10.1.1.0/24 network to communicate with instances in the 172.16.45.0/24 network, and vice versa. By configuring an alias-IP range, instances will be able to communicate with each other without the need for VPC peering or DNS records.

In conclusion, to create a VPC network that allows instances to have IP addresses in both the 10.1.1.0/24 network and the 172.16.45.0/24 network, you should configure an alias-IP range of 172.16.45.0/24 on the virtual instances within the VPC subnet of 10.1.1.0/24.