HP0-Y51 Online Practice Questions and Answers

An administrator sets up an OpenFlow instance on an HP Provision switch in passive mode. What does this mean?

A. The switch first attempts to switch or route traffic using its own MAC forwarding and routing tables. If it does not know how to treat the traffic, it uses the OpenFlow table.

B. The switch does not associate this OpenFlow instance with a specific VLAN Instead VLANs that are not assigned to another OpenFlow instance are associated with this instance.

C. The switch matches all traffic in the instance against an OpenFlow table, but, if it finds no match, it forwards the traffic normally

D. The switch does not forward any traffic in the instance locally. Instead, it encapsulates all traffic in OpenFlow Packeket_Out messages to the controller.

Table of Acronyms

Refer to the exhibit

An administrator wants to connect four data centers using HP EVI. What is the correct setup for the EVI tunnel interfaces?

A. Three EVI tunnel interfaces on each EVI edge device-one EVI tunnel interface is required for each GRE tunnel in the mesh

B. One EVI tunnel interface on Switch 1, which will be configured as the ENDP server, and no interfaces on the other switches

C. Three EVI tunnel interfaces on Switch 1, which will act as the hub. and one EVI tunnel interface each on the other switches

D. One EVI tunnel interface on each EVI edge device--the devices automatically establish GRE tunnels between these interfaces

An administrator plans to deploy a wireless network, which might need to support a mix of 802.11g and 802.11n clients in the 2.4 GHz frequency. The administrator wants to prioritize transmissions for 802.11 n clients. Which 2.4 GHz radio setting helps to prevent slow clients from taking more than their share of transmission time?

A. Set up the channel reuse option.

B. Set up the fair scheduling option.

C. Set the mandatory data rate for 802.11g as low as possible.

D. Set the multicast data rate for 802.11n as low as possible.

Refer to the exhibit.

The HP Comware switch places VLAN 2, which is associated with 10 1.2.0/24, in OpenFlow instance 1. The switch supports IP routing and is configure with the default gateway IP address in VLAN 2. An SDN application has created the flow entry shown in the exhibit to route traffic from 10.1.2.0/24 to 10.1.3.0/24. The exhibit does not show the output interface for the flow. Which output interface supports the needs of this scenario?

A. Any port that is a member of VLAN 2

B. Any port in the controller VLAN

C. Normal

D. Controller

A company has an external SDN application that works with an HP VAN SDN Controller. The application programmer has tried testing several RESTful API calls but receives authentication errors. What does the administrator need to explain to the programmer?

A. Every RESTful API call must include an X-Auth token. The token can be obtained by sending a calf with valid credentials https.Controller_IP.8443/sdn/v2.0/ auth

B. Every RESTful API call must include a valid username and password. The only exception is when the AuthRequired parameter is set to false in restful conf file.

C. Every RESTful API call must include an X-Auth token. The token must be created by a valid certification authority (CA) and installed on both the controller and external application in advance.

D. The application must be installed with a certificate that is signed by the same certification authority (CA) that signed the VAN SDN Controller certificate.

A company has three HP VAN SDN Controllers, which will be deployed in a team. The administrator is deciding whether to create one region or three regions. What is a benefit of creating three regions rather than one region?

A. The team can load balance the team leader role, increasing the total number of RESTful API and Java API calls that the solution can handle.

B. The team can provide high availability for SDN application functions rather than only for the OpenFlow controller functions rather than only for the OpenFlow controller functions.

C. The team can load balance the Master OpenFlow controller role, increasing the total number of packetin messages per second that the solution can handle.

D. The team can provide high availability for all the OpenFlow controller functions rather than only for the SDN application functions.

Refer to the exhibit.

A company has two HP Unified Wired-Wireless controllers. The MSM APs in Area 1 in the exhibit are controlled by Controller1. The MSM APs in Area 2 in the exhibit are controlled by Controlled. The company purchases a Controlled to provide backup for both Controller1 and Controller2 (N+1 redundancy).

How does the administrator set up the APs in Area 1 so that they contact Controlled if Controller1 fails?

A. Create a roam group that includes Controller1, Controlled, and Controlled. Make sure that Controlled has the highest IP address

B. Create AP templates for the area 1 APs on Controlled and set its connection priority for these APs to 7.

C. Create a backup AC configuration group between Controller1 and Controlled. Enable Fast Backup on the group.

D. On Controller1, configure the new controller's IP address as the backup controller for the APs

A company is considering TRILL and SPBM as options for the data center architecture. The company is interested in how the solution handles load-balancing unicast traffic. What correctly describes the TRILL and SPBM options?

A. TRILL can use Equal Cost Multi-Path (ECMP). SPBM selects one best path to each SPBM switch in each B-VLAN, but can select different paths for different B-VLANs

B. SPBM can use Equal Cost Multi-Path (ECMP). TRILL does not support ECMP for unicasts, but can load-balance multicast, depending on the tree configuration.

C. Neither SPBM nor TRILL can use Equal Cost Multi-Path (ECMP). Both technologies can send traffic for different VLAN VLANs or I-SIDs on different links.

D. Both SPBM and TRILL can use Equal Cost Multi-Path (ECMP) to load-balance unicasts. provided that ECMP is enable at hardware level.

An administrator has set up an HP BYOD solution for an HP MSM760 controller and its APs.

These are the specifications:

Guests should only have to register and log in once After that, the guest device should be automatically logged in.

User Access Manager (UAM) provides the portal in which guests register their own accounts.

The MSM760 is connected to a Comware switch, which redirects unregistered guests to the UAM portal.

Currently guests can reach the portal, register for their accounts, and log in. However, guests report that they cannot reach the Internet after they log in. When the administrator asks the guests to disconnect from the wireless network and then connect again, they succeed in reaching the Internet.

What could fix this problem?

A. In the Comware switch settings, add the guest router to the free rule list

B. In the DHCP scope for the onboardmg VLAN, lower the lease time to about 10 seconds.

C. Configure SOAP settings for the MSM controller on UAM.

D. Configure the Comware switch to accept dynamic authorization updates from UAM.

Table of Acronyms

Refer to the exhibit.

An administrator is setting up MPLS Layer 2 VPN connections between several customer sites:

Connection 1 = Customer site 1 to customer site 2

Connection 2 = Customer site 1 to customer site 3

On PE-1, interface GigabitEthernet1/0/1 connects to CE-1 at site 1. Which setup establishes the desired connections?

A. CE-1 connects to CE-2 in one VLAN, which it assigns to VPN instance 1. It connects to CE-3 in a different VLAN, which it assigns to VPN instance 2. PE-1 instant places G1/0/1 in both VPN instances 1 and 2 and associates each VPN instance with a PW for one of the connections.

B. CE-1 connects to CE-2 in one VLAN and to CE-3 in a different VLAN. PE-1 has two services instances on G1/D/1. One instance encapsulates one VLAN ID and has PW to PE-2, and the other instance encapsulates the other VLAN and has a PW to PE-3

C. PE-1 has two policy-based routing (PBR) policies, each of which selects traffic destined to Site 2 or Site 3. The appropriate policy is applied to the PW for each connection

D. CE-1 implements MPLS. It establishes two PWs with PE-1, one for its connection to CE-2 and one for its connection to CE-3. PE-1 maps the out label for the first PW to the in label for a PW to PE-2. It maps the labels similarly for a PW to PE-3.