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 32 and total pods in the cluster 1600.
2. Services could grow to 4000.
Which of the designs meets the requirements for node, pod and service IP range with little wastage of IP addresses?
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 /20 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: B
The maximum pod per is 32. Therefore for 32 * 50 nodes = 1600 pods. A /26 (64 addresses) subnet mask will be used per node (pod subnet mask = 31 – log2[32]) therefore 3200 IP Addresses (/20) will be needed for the pod IP CIDR. A /26 has 64 addresses is the minimum needed for a cluster of 50 nodes, also a /20 CIDR has 4096 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 correct.
Option C is incorrect because subnet size is too small with 16 addresses, pod IP is too small with 2048 addresses and services IP cidr with 1024 addresses.
Option D is incorrect because subnet size is small with 32 addresses, and pod IP is too small with 512 addresses and services IP cidr with 1024 addresses.
Reference
Comments are closed, but trackbacks and pingbacks are open.