Virtual Cloud Networks (VCNs) and IP Ranges for Oracle Cloud Infrastructure (OCI) | Exam 1Z0-1067-21

Valid IP Ranges for Oracle Cloud Infrastructure (OCI) VCNs

Question

You have been asked to review a network design for Oracle Cloud Infrastructure (OCI) by a major client.

The client's IT team needs to provision two Virtual Cloud Networks (VCNs) for a major application.

The application uses a large number of virtual machine instances.

Additionally, in the future, a VCN peering will be required to allow connectivity between the VCNs.

Which of the following are valid IP ranges to consider? (Choose the best answer.)

Answers

Explanations

Click on the arrows to vote for the correct answer

A. B. C. D.

D.

https://blogs.oracle.com/developers/setting-up-a-virtual-cloud-network-vcn-in-oracle-cloud-infrastructure

In this scenario, we need to provision two VCNs for a major application that uses a large number of virtual machine instances. It is also required to have a VCN peering to allow connectivity between the VCNs in the future.

For each VCN, we need to select an IP range that does not overlap with the other VCN or any other network that will be connected to the VCNs in the future. Additionally, we need to select an IP range that is large enough to accommodate the expected number of virtual machine instances.

Let's review each option and see if they meet these requirements:

A. 10.0.0.0/30 and 192.168.0.0/30

  • 10.0.0.0/30 only provides 2 usable IP addresses, which is not sufficient for a large number of virtual machine instances.
  • 192.168.0.0/30 only provides 2 usable IP addresses, which is not sufficient for a large number of virtual machine instances.
  • Neither of these IP ranges is large enough to accommodate a large number of virtual machine instances.

B. 10.0.0.0/8 and 11.0.0.0/8

  • 10.0.0.0/8 provides a large range of IP addresses (16,777,214 usable IP addresses), which is more than sufficient for a large number of virtual machine instances.
  • 11.0.0.0/8 provides a large range of IP addresses (16,777,214 usable IP addresses), which is more than sufficient for a large number of virtual machine instances.
  • These IP ranges do not overlap with each other or any other network that will be connected to the VCNs in the future.

C. 10.0.8.0/21 and 10.0.16.0/22

  • 10.0.8.0/21 provides a range of 2,046 usable IP addresses, which may not be sufficient for a large number of virtual machine instances.
  • 10.0.16.0/22 provides a range of 1,022 usable IP addresses, which may not be sufficient for a large number of virtual machine instances.
  • These IP ranges do not overlap with each other or any other network that will be connected to the VCNs in the future.

D. 10.0.0.0/16 and 10.0.64.0/24

  • 10.0.0.0/16 provides a large range of IP addresses (65,534 usable IP addresses), which is more than sufficient for a large number of virtual machine instances.
  • 10.0.64.0/24 provides a range of 254 usable IP addresses, which may not be sufficient for a large number of virtual machine instances.
  • These IP ranges do not overlap with each other or any other network that will be connected to the VCNs in the future.

Based on the above analysis, option B is the best answer as it provides two large IP ranges that do not overlap with each other or any other network that will be connected to the VCNs in the future.