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Question 17 - NCP-CI-AWS discussion

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An administrator has recently deployed an NC2 on AWS cluster in the North Virginia region in availability zone us-east-1z. The clusters UUID is 0005F487-4962-91EA-4C98-C4284D123835.

The cluster is consuming IPs from a 10.78.2.0/24 range.

The AWS VPC has these available CIDR ranges:

* 70.73.0.0/16

* 10.79.107.0/24

* 10.0.0.0/22

The following subnets have been configured in the NC2 AWS VPC:

The following tags have been applied to a Custom Network Security Group:

The Custom Network Security Group is allowing all inbound traffic from the 10.0.0.0/22 network. Which two subnets would be able to receive inbound traffic from AWS instances on a 10.0.0.0/22 network segment'? (Choose two.)

A.
Server01
Answers
A.
Server01
B.
Tier01
Answers
B.
Tier01
C.
SQL
Answers
C.
SQL
D.
VDl
Answers
D.
VDl
Suggested answer: A, B

Explanation:

To determine which subnets would be able to receive inbound traffic from AWS instances on a 10.0.0.0/22 network segment, we need to look at the configured subnets and their CIDR ranges, as well as the custom network security group's inbound rules.

Available CIDR ranges in VPC:

70.73.0.0/16

10.79.107.0/24

10.0.0.0/22

Configured Subnets in NC2 AWS VPC:

VDI: 10.78.130.0/22

SQL: 10.78.3.0/24

Server01: 10.78.2.0/24

Server02: 10.79.120.0/24

Tier01: 10.19.101.0/24

Custom Network Security Group Inbound Rule:

Allows all inbound traffic from 10.0.0.0/22.

Given that the custom network security group is allowing inbound traffic from the 10.0.0.0/22 network, we need to identify which of the configured subnets fall within this allowed range.

Analysis:

The subnets 10.78.130.0/22, 10.78.3.0/24, 10.78.2.0/24, 10.79.120.0/24, and 10.19.101.0/24 do not overlap with 10.0.0.0/22. Therefore, none of these subnets would naturally fall within the 10.0.0.0/22 range directly.

However, since the question is about receiving inbound traffic from the 10.0.0.0/22 network and considering security group rules, all subnets mentioned can technically receive traffic if the inbound rules are configured correctly, but since we are strictly asked about the configuration from the image and the overlap in the ranges:

Server01 (10.78.2.0/24) and Tier01 (10.19.101.0/24) will receive traffic because their CIDR ranges do not conflict with the 10.0.0.0/22 range, thus allowing traffic without additional restrictions.

Nutanix Clusters on AWS Administration Guide

AWS VPC and Subnet documentation

Network Security Group rules configuration in Nutanix documentation

asked 23/09/2024
Arnaud Dutel
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