Free HP2-Z31 Exam Dumps PDF Preview

Question 1

Single choice

Which mechanism provides authentication of API calls via the REST API within the HP VAN SDN Controller?

A
Openstack Keystone
B
Java
C
RabbitMQ
D
Openstack

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Correct answerA

Explanation

The SDN controller uses Openstack Keystone as an identity management for managing users, generating tokens, as well as token validation.

References:
HP VAN SDN Controller Administrator Guide

Question 2

Single choice

Refer to the exhibit.

The topology shown in the exhibit has the following characteristics:
* The Open Flow enabled switches are running in virtualization mode with member VLAN 10
* All the switches in the topology share the same VLANs.
* All the VLANs are tagged on all the links.
* Each OpenFlow domain is controlled by its own controller and is making independent decisions
* Every switch within the topology has PVST enabled only on VLAN 10

The networking team implementing OpenFlow reports that there are communication problems between the OpenFlow domains.

What could be the cause of this communication problem?

A
This is an unsupported topology.
B
OpenFlow requires a dedicated out-of-band management network
C
OpenFlow networks that communicate must use different VLANs.
D
A loop has been formed.

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Correct answerA

Explanation

Virtualization mode
With Virtualization Mode, some VLANs can be designated as members of OpenFlow instances. Each OpenFlow instance is independent and has its own OpenFlow configuratio

Note: OpenFlow can be configured for Virtualization Mode or Aggregation Mode.
* Virtualization Mode
Each OpenFlow instance is independent and has its own OpenFlow configuration and OpenFlow controller connection. Some VLANs are designated as members of OpenFlow instances while other VLANs are not.
The VLANs that are not members of OpenFlow instances could be thought of as VLANs carrying production traffic.
* Aggregation Mode
Provides a single OpenFlow instance that includes all of the VLANs configured on the switch except the VLAN(s) that connect to the controller(s) and the Management VLAN on the switch.
Production traffic is not allowed

References:
HP OpenFlow Switches Administrator's Guide

Question 3

Single choice

Why would an architect require an application to be written as an internal application rather than as an external application?

A
lower cost of development
B
faster event-driven responses
C
greater flexibility of platform choices
D
increased program language options

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Correct answerB

Explanation

HP SDN Controller Internal Applications and Modules There are two main ways applications interact with the controller:

Within the controller using native applications or modules (Java based or byte compatible applications such as Scala).

Outside the controller using web based applications (using RESTful APIs).
Application Types:
Native Applications / Modules - This is the ideal model for applications that need to exert relatively finegrained, frequent and low-latency control interactions with the environment, e.g. handling packet-in events, etc.
Web Based applications - Suitable for applications that need to exert "business" level, i.e. relatively coarsegrained, infrequent and high-latency control interactions with the environment, e.g. path provisioning, flow inspections, etc.

References:
HP SDN Controller Architecture, Technical Solution Guide

Question 4

Single choice

An SDN developer wants to develop a new OpenFlow proactive application using the HP VAN SDN Controller. The controller is configured with IP address 192.168.56.7 and is using release 2.0. The developer is unsure of the REST APIs available on the controller.

To which URL should you recommend the developer navigate?

A
https://192.168.56.7:8443/api
B
https://192.168.56.7:8443/sdn/ui
C
http://192.168.56.7:8443/api
D
http://192.168.56.7:8443/sdn/ui

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Correct answerA

Explanation

{base uri}/{api}
This is an unauthenticated API
Use https not http.
Example:
https://15.255.121.2:8443/api

Response codes
- Normal: OK (200)
- Error: Not Found (404), Service Unavailable (503) Reference: HP VAN SDN Controller 2.2 REST AP

Question 5

Single choice

Which statement best describes software-defined networking (SDN)?

A
SDN allows software to leverage the network infrastructure, enabling a centralized and policy-based approach to network provisioning and traffic forwarding.
B
SDN allows administrators to share software, policies, templates, and applications between multiple virtual machines that are running on the same network.
C
SDN is another name for OpenFlow, a protocol that lets switches handle traffic with OpenFlow tables rather than MAC forwarding tables and routing tables.
D
SDN lets IT developers manage physical infrastructure devices directly without pre-defined templates or intermediary devices.

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Correct answerA

Explanation

The HP VAN SDN Controller is a Java-based OpenFlow controller enabling SDN solutions such as network controllers for the data center, public cloud, private cloud, and campus edge networks. This includes providing an open platform for developing experimental and special-purpose network control protocols using a built-in OpenFlow controller. The HP VAN SDN Controller is a platform for developing SDN applications and deploying SDN applications. The controller can be characterized as providing a Base Control Platform, a Distributed Platform for High-Availability and Scalability, and an Extensible Platform.

References:
HP VAN SDN Controller Administrator Guide

Question 6

Single choice

A company has an IRF-based, 2-tier FlexFabric architecture in its data center. The company is now increasing the amount of server virtualization and also adding more redundant connections across the network infrastructure backbone.

Which benefit does software-defined networking (SDN) provide for this FlexFabric solution?

A
SDN applications can extend the virtual switches inside hosts into the control plane of multiple physical infrastructure devices.
B
SDN can help core routing switches handle more routing table entries without sacrificing performance.
C
SDN extends the SNMP MIBs to include MIBs for virtual switches.
D
SDN applications can help to provision network connectivity for virtual machines and to forward traffic across complex meshes of links

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Correct answerA

Explanation

Q: What is HP's SDN strategy?
A: Virtual Application Networks represent HP's software-defined network vision. By leveraging SDN-enabled infrastructure, control plane, applications and integrated management systems HP is creating an open ecosystem to drive new innovation in networking.

Q: What is the HP Virtual Application Networks SDN Controller?
A: The HP Virtual Application Networks SDN controller is an integral part of HP's Virtual Application Networks offering. The controller acts as the central building block for an abstracted control plane in the
SDN architecture.

References:
Virtual Application Networks Overview (http://h20195.www2.hp.com/V2/GetPDF.aspx/4AA4-4714ENW.pdf?jumpid=em_r1165_ww/en/large/eg/RelatedLink/Virtual_Application_Networks_Overview_FAQs/resourcefinder/Jan_2013)

Question 7

Single choice

Refer to the exhibit.

Mininet is being used by a developer to test an OpenFlow RESTful API application developed in Python.
The developer is able to view the switches in the OpenFlow topology diagram shown in the exhibit, but no hosts are displayed in the topology diagram. The same behavior is seen when making a RESTful API call for nodes via the RESTful API. Switch information is provided via API calls from the HP VAN SDN Controller, but no nodes are shown.

What is a possible issue?

A
Traffic needs to be sent by the Mininet nodes before they will be discovered by the HP VAN SDN Controller.
B
The developer is using the incorrect API calls and needs to ensure that tokens are sent when requesting information from the HP VAN SDN Controller
C
OpenFlow communication between Mininet and the HP VAN SDN Controller is not functioning correctly. Wireshark can be used to aid with troubleshooting the OpenFlow communication.
D
The Topology Service has been stopped on the HP VAN SDN Controller and needs to be started.

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Correct answerD

Explanation

The Topology service is used to create a network graph and compute the shortest path between two hosts.

Note: Mininet is a network emulator that can create and emulate an entire OpenFlow network locally on your PC.

Incorrect:
Not C: No need to analyze packages.
Wireshark is a free and open-source packet analyzer. It is used for network troubleshooting, analysis, software and communications protocol development, and education.

References:
HP VAN SDN Controller Administrator Guide

Question 8

Single choice

An HP Provision switch loses its OpenFlow connection to the HP VAN SDN Controller.

How is traffic processed by default if no controller teaming is configured?

A
Packets and messages destined to the controller are dropped. Flows continue to expire according to their time-outs. This is because the default setting on HP Provision switches is fail-standalone.
B
Packets and messages of new flows behave as a legacy switch or router would. Existing flows of this OpenFlow instance are removed. This is because the default setting on HP Provision switches is fail-standalone.
C
Packets and messages of new flows behave as a legacy switch or router would. Existing flows of this OpenFlow instance are removed. This is because the default setting on HP Provision switches is fail-secure.
D
Packets and messages destined to the controller are dropped. Flows continue to expire according to their time-outs. This is because the default setting on HP Provision switches is fail-secure.

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Correct answerD

Explanation

OpenFlow instance connection interruption mode
You can set the type of behavior when the switch loses connection with the controller.

OpenFlow instance connection interruption mode
fail-secure
If the switch loses connection with all of the controllers, packets and messages destined to the current controller are dropped. Flows continue to expire according to their time-outs.
Default: fail-secure

References:
HP OpenFlow Switches (page 21) (http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c03512348-4.pdf)

Question 9

Single choice

A customer wants to deploy an HP ProVision-based network with laptops daisy chained to physical IP phones. The customer also wants the laptop traffic to be managed by OpenFlow, while the phones use traditional QoS.

Which OpenFlow switch instance configuration option should the customer use?

A
QoS passthrough
B
Aggregate
C
Virtualization
D
Passive

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Correct answerC

Question 10

Multiple choice

An administrator wants to install the HP VAN SDN Controller in a production environment using virtualization technologies.

Which hypervisors are supported? (Select two.)

A
VirtualBox 4.2.20 and greater
B
KVM Version 2.4.5-1 and greater
C
Parallels 8 0 and greater
D
VMware ESXi Versions 5.0.0. 5.0.1. and greater
E
VMware workstation 9.0 and greater

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Correct answersB, D

Explanation

Software you must install before you begin the controller installation process
* Operating system: Ubuntu 12.04 LTS 64-bit Server (Linux 3.2 kernel)
* Supported hypervisors (if operating system is run on a virtual machine):
KVM Version 2.4.5-1 and greater ESXi Versions 5.0.0 and greater

References:
HP VAN SDN Controller and Applications Support Matrix

Question 11

Single choice

Which northbound API for external applications do developers use to communicate with the HP VAN SDN Controller?

A
JSON
B
NETCONF
C
HTTPS
D
REST

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Correct answerD

Explanation

PLUMgrid's proprietary controller is designed to maintain control of its network virtualization solution and is not targeted at controlling external elements today. Like other network virtualization-focused controllers, it provides RESTful APIs in the form of proprietary northbound interfaces.

References:
SDN Controller Wars 2.0 ON.LAB & Juniper Re-Ignite the Open-Source Battleground. Part 1 of 2 (http://www.sdncentral.com/market/controller-onlab-juniper-open-source-sdn-battleground-part1/2013/12/)

Question 12

Single choice

What is a key advantage of implementing malware protection by using the HP Network Protector SDN application?

A
To provide central management of antivirus software
B
To provide rule-based access control
C
To provide VLAN assignment without supplicant
D
To provide clientless operation

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Correct answerB

Explanation

About VLAN group policies
Policies are a collection of filters or rules that provide a method for setting up security configuration options for VLAN groups. You can create customized policies for each VLAN group based on the requirements and the threat type for each group.

You can customize the policies for the groups by setting the reputation scores. You can set up policies for each group to protect your network from the following threat types: Botnet, Malware, etc

References:
HP Network Protector SDN Application Administrator Guide

Question 13

Single choice

Which protocol is used for link discovery when OpenFlow switches are separated by a non-OpenFlow switch?

A
BDDP
B
RSTP
C
LLDP
D
LACP

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Correct answerA

Explanation

LLDP is used to discover direct links between switches and BDDP is used to discover the switches in the same broadcast domain.

Note: Using a link-discovery module, the controller generates both LLDP and broadcast packets (referred to as BDDPs) and sends them to all neighboring switches on a regular basis.

References:
OpenFlow Controller

Question 14

Single choice

Which protocol does HP IMC use to communicate with the HP VAN SDN Controllers?

A
SNMP
B
TCL
C
Open Flow
D
REST

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Correct answerD

Explanation

IMC uses a REST interface to manage the HP VAN SDN Controller Reference: Technical white paper, Mock RFI for Enterprise SDN Solutions
http://h20195.www2.hp.com/V2/getpdf.aspx/4AA5-1162ENW.pdf
(page 5)

Free HP2-Z31 Exam Dumps Preview

Creating HP Software-defined Networks

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