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HP HP2-Z31 Exam Practice Questions (P. 3)

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Question #11
Which technology can be used in OpenFlow 1.3 that allows rate limiting of packets that are sent to the SDN Controller?
  1. A
    Slicing
  2. B
    sFlow support
  3. C
    Meter on IP ToS/DSCP bits
  4. D
    Meter table

Correct Answer:
D
Per-flow meters -
OpenFlow 1.3 brings support for per-flow meters. These can be attached to flow entries and can measure and control the rate of packets. One of the main applications of perflow meters is to rate limit packets sent to the controller.
Reference: Production-ready SDN with OpenFlow 1.3

http://h17007.www1.hp.com/docs/interop/2013/37958_HPN_SDN_Openflow_Brief_042913_lo.pdf
(page 2)

Question #12
What is used by the HP VAN SDN Controllers for internal communication between controllers?
  1. A
    REST API Token
  2. B
    Admin ToKen
  3. C
    Auth ToKen
  4. D
    Service Token

Correct Answer:
D
The Service token is used for internal communication between controllers and is not exposed to the user.
Reference: HP VAN SDN Controller Administrator Guide, Service and Admin Tokens

Question #13
What is a key feature of cloud computing?
  1. A
    server virtualization
  2. B
    network management virtualization
  3. C
    user self-provisioning
  4. D
    software-defined networking

Correct Answer:
A
Virtualization is a foundational element of cloud computing and helps deliver on the value of cloud computing. Cloud computing is the delivery of shared computing resources, software or data as a service and on-demand through the Internet
Reference: Virtualization vs. Cloud Computing: What's the Difference? http://www.businessnewsdaily.com/5791-virtualization-vs-cloud-computing.html

Question #14
An administrator wants to navigate to the HP VAN SDN Controller graphical user interface to view options such as the OpenFlow Topology, Alerts, and installed applications. Which URL is correct for release 2.0 of the HP VAN SDN Controller configured with IP address 192.168.56.7?
  1. A
    https://192.168.56.7:8443/api
  2. B
    https://192.168.56.7:8080/sdn/ui
  3. C
    https://192.168.56.7:8443/sdn/ui
  4. D
    http://192.168.56.7:8443/sdn/ui C

Correct Answer:
Explanation
Start the SDN Graphical User Interface
1. Use the Google Chrome browser to access the controller's GUI at the controller IP address: https://<controller_ip_addr>:8443/sdn/ui
For example:
https://127.0.0.1:8443/sdn/ui
2. Enter user name and password credentials, then click Login.
✑ The default user name is "sdn".
✑ The default password is "skyline".
The main controller GUI screen then appears:

Reference: HP VAN SDN Controller Administrator Guide

Question #15
Which OpenFlow message ensures that all previous flow mod messages have been processed by the OpenFlow switch agent and that there are no flow mod messages queued for processing from an earlier time?
  1. A
    Flush
  2. B
    Push
  3. C
    Barrier
  4. D
    Force

Correct Answer:
A
flush()
Pushes buffered data out the Stream; this is NOT guranteed to flush all data, multiple flush() calls may be required, until needFlush() returns false.
Reference: org.openflow.io, Interface OFMessageOutStream

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