HP2-Z31 Online Practice Questions and Answers

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

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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

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)

Correct Answer: A

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

Correct Answer: D

Node Manager

Operation:

Learns and maintains end-host locations in the network. Uses information received from network devices

to maintain the ARP table and end host data.

Uses the Topology Service to determine if a port receiving a packet is an edge port or not.

Learns and maintains end nodes in the controller domain, and associates end nodes with edge ports.

Builds an ARP cache with MAC-IP translations of end hosts.

Maintains ARPs on a per-VID basis.

Provides the edge port details for end hosts.

Reference: HP VAN SDN Controller Administrator Guide

Correct Answer: B

Path Diagnostics Determines and verifies the path taken by a specific packet from a source host to destination host. Evaluates flows configured across the switches in the control domain for diagnosis Creates `Observation posts' on every switch in the path that the packet would take Tallys packet_ins from the observation posts to figure out where a path is broken Lists neighbors for any given device

Reference: HP VAN SDN Controller Administrator Guide

Correct Answer: AE

Correct Answer: B

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

Reference: HP Network Protector SDN Application Administrator Guide

Correct Answer: BE

OpenFlow flow entry timers include the idle timeout, the hard timeout, and the purge flow timer.

Reference: Understanding OpenFlow Flow Entry Timers on Devices Running Junos OS http:// www.juniper.net/techpubs/en_US/junos13.3/topics/concept/junos-sdn-openflow-flow- entry-timersoverview.html

Correct Answer: A

Flow Management:

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Delivers History Flow Entry records flow entry used before to help administrators audit flow policy change

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Displays the list of all current Flow entry in OF network, including Match Field, Instruction and other statistics.

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Shows detailed flow service information and flow traffic and trend in flow entry detail page

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Provides shortcut to locate flow to topology show device and link status

Reference: HP IMC Virtual Application Networks Software-defined Networking Manager Software