Practice Test 4 | Google Cloud Certified Professional Cloud Network Engineer | Dumps | Mock Test
A company needs a network design for their VPC-native cluster. You have been provided with the specifications below.
1. Maximum pods per node is 50 and total pods in the cluster 500.
2. User-managed secondary IP ranges with the minimum CIDR blocks to achieve this.
3. Services could grow to 1000.
Which of the designs meets the requirements for node, pod and service IP range with little wastage of IP addresses?
A. A /25 for the subnet size, pod IP block of /20 and a services IP block of /19.
B. A /26 for the subnet size, pod IP block of /21 and a services IP block of /20
C. A /28 for the subnet size, pod IP block of /21 and a services IP block of /22.
D. A /27 for the subnet size, pod IP block of /23 and a services IP block of /22.
Answer: C
The maximum pod per is 50. Therefore for 50 * 10 nodes = 500 pods. A /25 (128 addresses) subnet mask will be used per node (pod subnet mask = 31 – log2[50]) therefore 1280 IP Addresses (/21) will be needed for the pod IP CIDR. A /28 has 16 addresses is the minimum needed for a cluster of 10 nodes, also a /22 CIDR has 1024 addresses is the minimum needed for the Services IP CIDR.
Option A is incorrect because subnet size is too large with 128 addresses, and services IP cidr with 8192 addresses.
Option B is incorrect because subnet size is too large with 64 addresses, and services IP cidr with 4096 addresses
Option C is correct
Option D is incorrect because subnet size is large with 32 addresses, and pod IP is too small with 512 addresses
Reference
Comments are closed, but trackbacks and pingbacks are open.