HP HP2-Z31 Online Practice Questions and Exam Preparation

HP HP2-Z31 Online Questions & Answers

• Question 31:

  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
  D. REST

  ---

  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. Reference: SDN Controller Wars 2.0 ON.LAB and 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 32:

  A network environment consists of multiple switches. Some of the switches are configured for OpenFlow 1.0, and some of the switches are configured for OpenFlow 1.3. These switches are configured to communicate with an HP VAN SDN Controller. What is the result of the negotiation?

  A. All OpenFlow switches successfully negotiate to use OpenFlow 1.3 with the controller, and OpenFlow 1.0 switches ignore OpenFlow 1.3 extensions.
  B. OpenFlow 1.3 switches successfully negotiate to use OpenFlow 1.3 with the controller, and the OpenFlow 1.0 switches fail to connect
  C. All switches negotiate to use OpenFlow 1.0 as the highest common version.
  D. OpenFlow 1.3 switches negotiate to use OpenFlow 1.3, and OpenFlow 1.0 switches negotiate to use OpenFlow 1.0.
  D. OpenFlow 1.3 switches negotiate to use OpenFlow 1.3, and OpenFlow 1.0 switches negotiate to use OpenFlow 1.0.

  ---

  The controller:

  

  Supports multiple OpenFlow versions at the same time.

  

  Negotiates with each OpenFlow switch for the highest common

  

  OpenFlow version between the switch and controller.

  Reference: HP VAN SDN Controller and Applications Support Matrix, Supported OpenFlow versions

• Question 33:

  Which components are used to identify a flow entry in OpenFlow 1.0?

  A. Match and Priority
  B. Action and Priority
  C. Action and Index
  D. Match and Index
  A. Match and Priority

  ---

  A flow table entry is identified by its match fields and priority: the match fields and priority taken together identify a unique flow entry in the flow table. T

  Reference: OpenFlow Switch Specification https://www.opennetworking.org/images/stories/downloads/sdn-resources/onf- (page 16) specifications/openflow/openflow-spec-v1.4.0.pdf

• Question 34:

  Refer to the exhibit.

  

  A customer has configured a VLAN to use OpenFlow. An HP Comware switch is used and configured to communicate with an HP VAN SDN Controller version 2.0. How was the flow entry in the exhibit added to the flow table of the switch?

  A. An application added the flow entry by making an API call against the southbound OpenFlow API of the HP VAN SDN Controller.
  B. The HP VAN SDN Controller topology service added this flow entry to the switch's flow table
  C. The HP VAN SDM Controller link discovery service added this flow entry to the switch's flow table
  D. An application added the flow entry by making an API call against the northbound REST API or JAVA API of the HP VAN SDN Controller.
  D. An application added the flow entry by making an API call against the northbound REST API or JAVA API of the HP VAN SDN Controller.

  ---

  Incorrect:

  Not A: Southbound API is not used by external Applications.

  Not B:

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

  Not C:

  The link discovery service is responsible for discovering and maintaining the status of links in the OpenFlow network. The link discovery would record Mac Addresses, not IP addresses.

  *

  Northbound API Relative to figure 1 below, the Northbound API is the API that enables communications between the control layer and the application layer (external business applications.

  Southbound API

  Relative to Figure 1 below, the Southbound API is the API that enables communications between the control layer and the infrastructure layer (OpenFlow).

  *

  Putting the region configurations in place in a controller team ensures seamless failover and failback among the configured controllers for the specified network devices in a region. That is, when a master controller experiences a fault, the Role Orchestration Service ensures that a slave controller immediately assumes the master role over the group of network devices to which the failed controller was in the master role. Reference: Technical white paper, Mock RFI for Enterprise SDN Solutions Reference: HP VAN SDN Controller Administrator Guide

  Note:

  *

  The exhibit shows that the IPv4 source address, 10.10.10.0 is a private network. The exhibit shows that the IPv4 destination address, 192.168.56.0 is also a private network.

  *

  display openflow instance instance-id flow-table [ table-id ] Display flow table entries for an OpenFlow instance.

  Figure 1. ONF's SDN architecture

  

• Question 35:

  Which environmental component is used to handle authentication requests to the HP VAN SDN Controller?

  A. Zookeeper
  B. Cassandra
  C. Neutron
  D. Keystone
  D. Keystone

  ---

  The SDN controller uses Openstack Keystone as an identity management for managing users, generating tokens, as well as token validation. Reference: HP VAN SDN Controller Administrator Guide

• Question 36:

  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
  B. KVM Version 2.4.5-1 and greater
  D. VMware ESXi Versions 5.0.0. 5.0.1. and greater

  ---

  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

  Reference: HP VAN SDN Controller and Applications Support Matrix

• Question 37:

  HP IMC provides comprehensive Fault Configuration, Accounting. Performance and Security functionality. Which functionality does the HP IMC SDN Manager provide? (Select three.)

  A. Accounting
  B. Reporting
  C. Performance
  D. Fault
  E. Configuration
  A. Accounting
  C. Performance
  E. Configuration

  ---

  A, B, C IMC VAN SDN Manager will feature full-fault, configuration, accounting, performance and security management for HP enabled SDN domains.. Enable deployment, monitoring and management of HP OpenFlow enabled switches

  *

  Visualize traffic flow and performance monitoring in HP SDN Domains

  *

  Backup and restore configurations and software of HP SDN Controllers ?Provide graphical OpenFlow troubleshooting with path analysis

  Reference: HP IMC Virtual Application Networks Modules

• Question 38:

  An administrator wants the switches to forward traffic in the legacy mode. If all the controllers fail, which action should the administrator take?

  A. Install a packetin rule as the lowest priority rule in the flow table.
  B. Configure the instance to fail in standalone mode.
  C. Install a packet_out rule as the lowest priority rule in the flow table.
  D. Configure the instance to fail in interruption mode.
  B. Configure the instance to fail in standalone mode.

  ---

  OpenFlow instance connection interruption mode

  You can set the type of behavior when the switch loses connection with the controller.

  fail-standalone

  If the switch loses connection with all of the controllers, packets and messages of new flows behave as a legacy switch or router would. Existing flows of this OpenFlow instance are removed.

  Reference: HP OpenFlow Switches

• Question 39:

  An administrator has created a whitelist entry for the website www.piratesmustdie.com. This has been applied to the test group, which contains VLANs 10-20. VLANs 1 - 20 are configured on switches in the network. A time range has been applied to the whitelist for the time period 9:00am to 5:00pm.

  Which users would be able to access the website?

  A. The website is blocked for all users because it has a reputation score of 80 in the RepDV database
  B. Users in VLAN 10 will be able to access the website at 10:00am.
  C. All users will be able to access the website at 4:00pm.
  D. Users in VLAN 5 will be able to access the website at 11:00pm.
  B. Users in VLAN 10 will be able to access the website at 10:00am.

• Question 40:

  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.
  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.

  ---

  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

  Reference: HP OpenFlow Switches

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