Download HP.HP0-Y47.PracticeTest.2018-08-16.28q.tqb
| Vendor: | HP |
| Exam Code: | HP0-Y47 |
| Exam Name: | Deploying HP FlexNetwork Core Technologies |
| Date: | Aug 16, 2018 |
| File Size: | 7 MB |
Demo Questions
Question 1
How does virtual output queuing (VoQ) help switches avoid head-of-line blocking and enhance throughput?
- It divides each port ingress queue into different queues based on the priority and egress port of each packet
- It establishes a matrix of connections to multiple cross-bar switches within the switch backplane
- It considers traffic congestion, queues traffic, and informs the ingress port when it can use the crossbar
- It allows the ingress port to fragment packets and send the fragments in multiple queues over different crossbars
Correct answer: A
Explanation:
A Virtual Output Queue (VOQ) is the technique used in input-queued switches where rather than keeping all traffic in a single queue, separate queues are maintained for each possible output location. It addresses a common problem known as head-of-line blocking. In VOQ each input port maintains a separate queue for each output port. It has been shown that VOQ can achieve 100% throughput performance with an effective scheduling algorithm. This scheduling algorithm should be able to provide a high speed mapping of packets from inputs to outputs on a cycle-to-cycle basis Reference: https://en.wikipedia.org/wiki/Virtual_Output_Queues A Virtual Output Queue (VOQ) is the technique used in input-queued switches where rather than keeping all traffic in a single queue, separate queues are maintained for each possible output location. It addresses a common problem known as head-of-line blocking.
In VOQ each input port maintains a separate queue for each output port. It has been shown that VOQ can achieve 100% throughput performance with an effective scheduling algorithm. This scheduling algorithm should be able to provide a high speed mapping of packets from inputs to outputs on a cycle-to-cycle basis
Reference: https://en.wikipedia.org/wiki/Virtual_Output_Queues
Question 2
A company uses 802.1X authentication to force users to authenticate to connect to the network. The company uses HP IMC User Access manager (UAM) as the RADIUS server. The company wants to assign users to VLANs based on their identity. For example, contractor should be assigned in VLAN 20. Assume that VLANs are extended correctly across the network infrastructure.
Where does a network administrator configure the VLAN policy?
- In the access device configuration UAM
- In local-user accounts for contractors, which are configured on access layer switches
- In an authorized VLAN list, which is applied to access layer switches edge ports
- In an access rule on UAM, which will be selected in the contractor service policy
Correct answer: D
Explanation:
The HP IMC User Access Management (UAM) Module supports user identity authentication based on access policies associated with infrastructure resources. Reference: Intelligent Management Center User Access Management Softwarehttp://h17007.www1.hp.com/us/en/networking/products/network-management/IMC_UAM_Software/index.aspx#.VYeq3vmqpBc The HP IMC User Access Management (UAM) Module supports user identity authentication based on access policies associated with infrastructure resources.
Reference: Intelligent Management Center User Access Management Software
http://h17007.www1.hp.com/us/en/networking/products/network-management/IMC_UAM_Software/index.aspx#.VYeq3vmqpBc
Question 3
Refer to the exhibit.
An HP Comware Switch connects to Voice over (VoIP) phones. The phones connect to user’s computes, so each switch port connects a computer and a phone.
These are the specifications:
- The VLAN for data traffic is VLAN3
- The VLAN for traffic VoIP is VLAN11
- The phones support Link Layer Discovery Protocol (LLDP) Media Endpoint Detection (MED).
The network administrator wants to use LLDP-MED to advertise the voice VLAN ID and priority settings to the phones. The phones will then send tagged traffic in that VLAN. The switch should not check the incoming traffic’s MAC address against its voice OID list. The exhibit shows the applicable switch port configuration.
Which additional step must the administrator complete to accomplish this?
- Enable voice VLAN 11 (voice vlan 11 enable)
- Change the port to trunk mode (port link-type trunk)
- Enable LLDP compatibility with Cisco Discovery Protocol (CDP) (lldp compliance admin-status cdp txrx)
- Enable the port to advertise voice VLAN 11 with LLDP (lldp voice-vlan 11)
Correct answer: D
Explanation:
LLDP must be enabled on this Ethernet ports and are configured to advertise the voice VLAN ID and QoS information using the Network Policy LLDP TLV. Reference: Application Notesfor using Link Layer Discovery Protocol (LLDP) with HP ProCurve Switches and Avaya IP Telephones - Issue 1.0http://h17007.www1.hp.com/docs/interoperability/Avaya/ProCurve-lldp.pdf LLDP must be enabled on this Ethernet ports and are configured to advertise the voice VLAN ID and QoS information using the Network Policy LLDP TLV.
Reference: Application Notesfor using Link Layer Discovery Protocol (LLDP) with HP ProCurve Switches and Avaya IP Telephones - Issue 1.0
http://h17007.www1.hp.com/docs/interoperability/Avaya/ProCurve-lldp.pdf
