HP HP ASE - FlexNetwork Architect V2, HP ASE - FlexNetwork Integrator V1 HP2-Z31 Questions & Answers

• Question 81:

  What is an advantage of using the HP Network Optimizer SDN application with UCandC applications rather than just the SDN applications?

  A. It enables the QoS trust boundary to be shifted to the switch.

  B. It enables the UCandC Client to select the UCandC application server optimally located for them.

  C. It removes the need for queuing.

  D. It enables QoS verification for BYOD.

  Correct Answer: D

  

  The first capability that's implemented is the ability of the Lync server (or any communications server, potentially) to dynamically provide to the network controller the IP addresses/ports of the paired endpoints of a real time flow. This enables the network to mark, without deep packet inspection, those flows with a CoS/QoS tag that will give them the proper treatment in the network. This becomes a positive identification of "authorized" real-time flows; any device/flow trying to use that tagging that is not "authorized" through the API can automatically be re-tagged to a best effort service class.

  This technique has a number of critical advantages over current techniques. When compared to the typical VLAN, it enables positive tagging of a variety of devices, including BYOD and potentially other systems that might have multiple traffic types (e.g., a PC running a soft client or a tablet).

  In addition, when compared to deep packet inspection at each access element, it reduces cost as well as eliminating the errors and complexity that encryption of the packet stream can introduce.

  Reference: HP and Microsoft Demo OpenFlow-Lync Applications-optimized Network

• Question 82:

  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

  Correct Answer: C

• Question 83:

  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

  Correct Answer: A

  {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 84:

  A customer has a network consisting of 90 switches running OpenFlow 1.0. High Availability is not required as a hybrid network is being used. Which license types does the customer need to purchase? (Select two.)

  A. HP VAN SDN Ctrl 100-node E-LTU

  B. HP VAN SDN Ctrl HA E-LTU

  C. HP VAN SDN Ctrl Base SWw/ 100-node E-LTU

  D. HP VAN SDN Ctrl Base SW w/ 50-node E-LTU

  E. HP VAN SDN Ctrl 50-node E-LTU

  Correct Answer: DE

  The following licenses are available for the HP VAN SDN Controller:

  * (D) Base controller license (HP VAN SDN Ctrl Base SW w/ 50node E-LTU)--Enables the HP VAN SDN Controller to communicate with up to 50 OpenFlow switches. This license is a prerequisite for the other licenses, and must be installed for you to receive technical support during your first 90 days of use. *(E) Base controller plus 50 "Add Nodes" license (HP VAN SDN Ctrl 50node E-LTU)-- Extends by 50 the number of switches the base controller can communicate with using OpenFlow. In addition, you can install the Add Nodes license multiple times. For example: If you install one Add Nodes license on an HP VAN SDN Controller with a base license present, the total number of OpenFlow switches supported is 100. If you install three Add Nodes licenses on an HP VAN SDN controller with a base license, the total number of OpenFlow switches supported is 200. Etc.

  Reference: HP VAN SDN Controller License Registration and Activation Guide

• Question 85:

  Which OpenFlow version introduces multiple flow tables?

  A. 1.0

  B. 1.1

  C. 1.2

  D. 1.3

  Correct Answer: D

  Openflow 1.3.1: Support for multiple flow tables is introduced Reference: Open Flow 1.3.1 Support: Controller View https://wiki.opendaylight.org/images/d/dc/Openflow1.3_Support_for_Opendaylight.pdf

• Question 86:

  An administrator wants to secure the connection between an HP Provision switch and HP VAN SDN Controller. What is the recommended approach to securing the OpenFlow messages?

  A. Use CA-signed certificates on an HP VAN SDN Controller and the HP Provision switches, and then use TLS to secure communication.

  B. Use OpenFlow message type 5 on the auxiliary channel to secure OpenFlow messages.

  C. Use an IPsec VPN between the HP Provision switch and the HP VAN SDN Controller to secure OpenFlow messages.

  D. Use self-signed certificates on an HP VAN SDN Controller and the HP Provision switches, and then use TLS to secure communication.

  Correct Answer: A

  The Openflow controller component relies on PKI to establish mutual trust (2-way SSL) between itself and the Openflow switches that it manages.

  Please note that both the Controller and Device certificates must be signed by the same CA, so that the TLS connection will be established.

  Reference: HP VAN SDN Controller Administrator Guide

• Question 87:

  What is one benefit of a software-defined networking (SDN) solution for a WAN?

  A. SDN applications can automatically deploy key services on branch zl or MSR modules in case of a failed WAN connection.

  B. SDN applications provide a remote connection to servers so that remote IT staff can identify and resolve issues.

  C. SDN applications provide a graphical interface for scripting CLI commands for multiple branches at once.

  D. SDN applications can adjust WAN bandwidth provisioning granularly, dynamically, and intelligently.

  Correct Answer: D

  Software-defined networking (SDN) is an architecture purporting to be dynamic, manageable, cost-

  effective, and adaptable, seeking to be suitable for the high-bandwidth, dynamic nature of today's

  applications.

  The SDN architecture is:

  Directly programmable: Network control is directly programmable because it is decoupled from forwarding

  functions.

  Agile: Abstracting control from forwarding lets administrators dynamically adjust network-wide traffic flow to

  meet changing needs.

  Reference: Wikipedia, Software-defined networking

• Question 88:

  What are challenges when selecting traffic from UCandC soft devices for marking, in order to apply the appropriate prioritization? (Select two.)

  A. UCandC traffic uses dynamic port numbers.

  B. UCandC traffic is not peer-to-peer

  C. UCandC traffic is routable.

  D. UCandC traffic uses well-known port numbers.

  E. UCandC traffic can share a port, mac, and VLAN combination with non-UCandC traffic.

  Correct Answer: CD

  C: UCandC signaling can be routed through centralized UCandC infrastructure components and that all

  interactions.

  D (not A): UCandC signaling traffic is identified using the well know transport and port numbers used by the

  UCandC signaling protocol.

  Reference: Automating QoS (page 7, bullet # 2) http://johnacook.files.wordpress.com/2014/03/2014_02_27_use_case.pdf

• Question 89:

  What are the addressing requirements for an HP VAN SDN Controller team?

  A. A team requires two IP addresses for each controller, plus one IP address assigned to the team.

  B. A team requires one IP address for each controller, plus one IP address assigned to the team.

  C. A team requires one IP address, and members communicate using their MAC addresses.

  D. A team requires one IP address for each controller; each is configured with the same multicast address.

  Correct Answer: B

  Explanation: A team requires one IP address for each controller, plus one IP address assigned to the team. If the current team manager goes down, the failover process includes keeping the team IP address active on the new team manager. Reference: HP VAN SDN Controller Administrator Guide

  http://h20566.www2.hp.com/portal/site/hpsc/template.BINARYPORTLET/public/kb/docDisplay/resourc e.process/? spf_p.tpst=kbDocDisplay_ws_BIandspf_p.rid_kbDocDisplay=docDisplayResURLandjavax.portlet.begCach eTok=com.vignette.cachetokenandspf_p.rst_kbDocDisplay=wsrp-resourceState%3DdocId%253Demr_na(page 54) c04003114-2%257CdocLocale%253Dandjavax.portlet.endCacheTok=com.vignette.cachetoken

• Question 90:

  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

  Correct Answer: A

  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.

  Reference: 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/resourc efinder/Jan_2013