Theopenstack server showcommand 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:

Theaddressesfield in the output shows

public1=10.0.2.176

This indicates that the VM-A instance is attached to the virtual network namedpublic1, with an assigned IP address of10.0.2.176.

Option Analysis:

A. m1.tiny

Incorrect: m1.tinyrefers 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:Theaddressesfield explicitly states that the VM-A instance is attached to thepublic1virtual network.

C. Nova

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

D. kollaopenstack

Incorrect: kollaopenstackappears in the output as the hostname or project name but does not represent a virtual network.

Why public1?

Network Attachment:Theaddressesfield 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 thepublic1network.

JNCIA Cloud References:

The JNCIA-Cloud certification emphasizes understanding OpenStack commands and outputs, including theopenstack server showcommand. 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 likepublic1.