HP2-Z31 Online Practice Questions and Answers

Correct Answer: D

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: 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: C

Once a team is configured, the configuration and monitoring of team members and their associated OpenFlow switches is performed by the team manager. If the team manager goes down, the controller with the next highest priority in the team configuration becomes the team manager.

Note: Team Management Each controller belonging to a team is a team member. To centralize team management and control, one controller is designated as the team manager. Teaming is configured on one controller and is automatically propagated to the other controllers in the team, regardless of which controller becomes the team manager.

Reference: HP VAN SDN Controller Administrator Guide

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

(page 21) http://h20628.www2.hp.com/km-ext/kmcsdirect/emr_na-c03512348-4.pdf

Correct Answer: CD

Download a Backup From the Controller to Another Location Both the .zip file and the .MD5 (checksum) file (zip.MD5) should be downloaded to the same, secure location. Choose the correct name now; you cannot rename the files later Details (check the file extensions):

1.

Download the Backup .zip File: curl --noproxy --header "X-Auth-Token:" --fail -ksSfL --request GET --url "https://:8443/sdn/v2.0/systems//backup?csum=false" > .zip

2.

Download the backup .MD5 (Checksum) File curl --noproxy --header "X-Auth-Token:" --fail -ksSfL --request GET --url "https://:8443/sdn/v2.0/systems//backup?csum=true" > .zip.MD5

Reference: HP VAN SDN Controller Administrator Guide

Correct Answer: A

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: C

* Northbound API Relative to figure 1 below, the Northbound API is the API that enables communications between the control layer and the application layer (external business applications.

Southbound API

Relative to Figure 1 below, the Southbound API is the API that enables communications between the control layer and the infrastructure layer (OpenFlow).

Figure 1. ONF's SDN architecture

* Putting the region configurations in place in a controller team ensures seamless failover and failback among the configured controllers for the specified network devices in a region. That is, when a master controller experiences a fault, the Role Orchestration Service ensures that a slave controller immediately assumes the master role over the group of network devices to which the failed controller was in the master role.

Reference: Technical white paper, Mock RFI for Enterprise SDN Solutions Reference: HP VAN SDN Controller Administrator Guide

Correct Answer: D

OSGi was thus selected to allow elasticity of applications. The applications can be dynamically introduced and dynamically removed from a running environment without having to shut down the whole controller and then restart it. Using a network analogy again, the applications are "hot- swappable".

Reference: HP Virtual Application Networks SDN Controller Technical Solution Guide http://www8.hp.com/ h20195/v2/GetPDF.aspx%2Fc04219919.pdf (page 11 and 12)

Correct Answer: B

OpenFlow version 1.3 is the latest version of OpenFlow that has support from switch vendors. It is significantly different from OpenFlow version 1.0 (which was the previous version several vendors supported). Among others, the main features added since then are:

1.1: Support for MPLS, Q-in-Q, VLANs, multipath, multiple tables, logical ports 1.2: Support for extensible headers (in match, packet_in, set_field), IPv6 1.3: Support for tunneling, per-flow traffic meters, Provider Backbone Bridging

Reference: OpenFlow version 1.3 tutorial

Correct Answer: D

The LLDP messages allow the link service to discover that there is physical link between two switches. If the LLDP message on one side of the link (Packet_Out) is received on the other side of the link (Packet_In) by a switch, LS knows that the two switches are connected to each other. The service is also responsible for identifying multi-hop links. These are links where non- OpenFlow devices are connected between two OpenFlow switches and thus separate the OpenFlow switches. The Link Service does this by sending BDDP (Broadcast version of LLDP) messages in addition to LLDP messages. LLDP is a one hop protocol and may be consumed by a non-OpenFlow switch because LLDP uses a multicast address which the intermediate switch may have subscribed to the LLDP multicast. However, a broadcast frame (BDDP) will be forwarded typically by the intermediate switch. BDDP has the same TLV information as LLDP.

Reference: HP SDN Network Services Modules