The openstack server show command provides detailed information about a specific virtual machine

(VM) instance in OpenStack. The output includes details such as the instance name, network

attachments, power state, and more. Let’s analyze the question and options:

Key Information from the Exhibit:

The addresses field in the output shows

public1=10.0.2.176

This indicates that the VM-A instance is attached to the virtual network named public1 , with an

assigned IP address of 10.0.2.176 .

Option Analysis:

A . m1.tiny

Incorrect: m1.tiny refers to the flavor of the VM, which specifies the resource allocation (e.g., CPU,

memory, disk). It is unrelated to the virtual network.

B . public1

Correct: The addresses field explicitly states that the VM-A instance is attached to the public1 virtual

network.

C . Nova

Incorrect: Nova is the OpenStack compute service that manages VM instances. It is not a virtual

network.

D . kollaopenstack

Incorrect: kollaopenstack appears in the output as the hostname or project name but does not

represent a virtual network.

Why public1?

Network Attachment: The addresses field in the output directly identifies the virtual network

(public1) to which the VM-A instance is attached.

IP Address Assignment: The IP address (10.0.2.176) confirms that the VM is connected to the public1

network.

JNCIA Cloud Reference:

The JNCIA-Cloud certification emphasizes understanding OpenStack commands and outputs,

including the openstack server show command. Recognizing how virtual networks are represented in

OpenStack is essential for managing VM connectivity.

For example, Juniper Contrail integrates with OpenStack Neutron to provide advanced networking

features for virtual networks like public1.

Reference:

OpenStack CLI Documentation: openstack server show Command

Juniper JNCIA-Cloud Study Guide: OpenStack Networking