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HP HP2-Z31 Exam Practice Questions (P. 2)

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Question #6
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?
  1. A
    Use CA-signed certificates on an HP VAN SDN Controller and the HP Provision switches, and then use TLS to secure communication.
  2. B
    Use OpenFlow message type 5 on the auxiliary channel to secure OpenFlow messages.
  3. C
    Use an IPsec VPN between the HP Provision switch and the HP VAN SDN Controller to secure OpenFlow messages.
  4. 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 #7
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.)
  1. A
    HP VAN SDN Ctrl 100-node E-LTU
  2. B
    HP VAN SDN Ctrl HA E-LTU
  3. C
    HP VAN SDN Ctrl Base SWw/ 100-node E-LTU
  4. D
    HP VAN SDN Ctrl Base SW w/ 50-node E-LTU
  5. 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 50–node 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 #8
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?
  1. A
    https://192.168.56.7:8443/api
  2. B
    https://192.168.56.7:8443/sdn/ui
  3. C
    http://192.168.56.7:8443/api
  4. 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 #9
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?
  1. A
    QoS passthrough
  2. B
    Aggregate
  3. C
    Virtualization
  4. D
    Passive

Correct Answer:
C

Question #10
What is an advantage of using the HP Network Optimizer SDN application with UC&C applications rather than just the SDN applications?
  1. A
    It enables the QoS trust boundary to be shifted to the switch.
  2. B
    It enables the UC&C Client to select the UC&C application server optimally located for them.
  3. C
    It removes the need for queuing.
  4. 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

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