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

Correct Answer: B

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

Correct Answer: D

This is an AuthenticationException.

Note: The SDN controller relies on token-based authentication to authenticate its REST APIs. In other words, all REST APIs except the /auth and /rsdoc APIs require an authentication token embedded in an "X-Auth-Token" header to be included with each REST request. The /auth API allows you to obtain a token, while the /rsdoc API provides live REST API documentation information about the controller's REST API.

Reference: HP VAN SDN Controller Administrator Guide

Correct Answer: A

Note:

idle_timeout - Number of idle seconds before the flow entry is removed. Defaults to no idle timeout.

priority - When using non-exact (wildcarded) matches, this specifies the priority for overlapping matches.

Higher values are higher priority. Not important for exact or non-overlapping entries.

actions - A list of actions to apply

. output: if no group action is specified, forward the packet on the port specified by the output action

Correct Answer: ACE

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

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Visualize traffic flow and performance monitoring in HP SDN Domains

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

Reference: HP IMC Virtual Application Networks Modules

Correct Answer: D

Setting policies to quarantine hosts

The application quarantines a host if the host satisfies the quarantine criteria set in the general threshold

policy. You can set policies to direct the host to a safe site and access limited resources on the network.

To set the general policies, complete the following steps.

1.

Select Policies Policy Enforcement Settings. The Policies/Policy Enforcement Settings page appears.

2.

Click the icon to edit the policy enforcement settings.

3.

Select Non-existent Domain option to display a message that the domain does not exist.

4.

Enter time in seconds in the TTL(sec) text box to cache the response.

5.

Select Redirection Server option to redirect the host to a known safe site.

6.

Enter the domain name or IP address of the known safe site in the DNS Redirection Server Address text box.

7.

Click icon to add the domain name or IP address of the resources that the host can access when it is quarantined.

8.

Click icon to save the setting.

Reference: HP Network Protector SDN Application Administrator Guide

Correct Answer: B

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

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: C

In Aggregation mode, all VLANs in the switch are part of an OpenFlow instance. When Aggregation is configured, there is only OpenFlow traffic, no production traffic.

Reference: HP OpenFlow 1.3 Administrator Guide, Wired Switches K/KA/KB/WB 15.15

Correct Answer: A

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Failover (step 1)

ROS (role orchestration service) triggers the failover operation in two cases:

/ Controller failure:

/ Device disconnect:

The ROS instance in a controller is notified of a communication failure with network device(s) through the

Controller Service notifications. It instantly communicates with all ROS instances in the team to determine

if the network device(s) in question are still connected to any of the backup (slave) controllers within the

team. If that is the case, it elects one of the slaves to assume the master role over the affected network

device(s).

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Failback (step 2)

When the configured master recovers from a failure and rejoins the team, or when the connection from the

disconnected device(s) with the original master is resumed, ROS initiates a failback operation in which the

master role is restored to the configured master as defined in the region definition.

Reference: HP VAN SDN Controller Administrator Guide