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HP HP0-Y43 Exam -

Free HP0-Y43 Sample Questions:

Q: 1
A customer requires an HP FlexCampus solution with a core that scales to 40/100G. Which HP switch fabric meets this need?
A. the 7500's CLOS switch fabric
B. the 10500's CLOS switch fabric
C. the 7500's crossbar switch fabric
D. the 10500's crossbar switch fabric
Answer: B
Explanation: HP 10500 Switch Series
Key features
* Leading CLOS architecture
* Greater than 11 terabit-per-second capacity
* Full Layer 3 features and IPv6/MPLS functionality
* HP IRF for simpler, flatter, more agile networks
* Ultra-high 10GbE/Gigabit density; 40/100GbE ready
Reference: QuickSpecs, HP 10500 Switch Series

Q: 2
A network uses PIM-DM to route multicast traffic. The network administrator has noticed bursts of congestion related to periodic floods of multicast traffic. How can the administrator eliminate these periodic bursts?
A. Leave PIM-DM enabled on the interfaces that face receivers, but enable PIM-SM throughout the core.
B. Decrease the PIM hello timer on VLAN interfaces on which PIM-DM is enabled.
C. Decrease the IGMP robustness variable on VLAN interfaces that connect to receivers.
D. Enable the state refresh feature on the VLAN interfaces on which PIM-DM is enabled.
Answer: A
Explanation: The PIM-DM and PIM-SM protocols on the switches enable and control multicast traffic routing.
IGMP provides the multicast traffic link between a host and a multicast router running PIM-DM or PIM-SM. IGMP and either PIM-DM or PIM-SM must be enabled on VLANs whose member ports have directly connected hosts with a valid need to join multicast groups.
PIM-DM is used in networks where, at any given time, multicast group members exist in relatively large numbers and are present in most subnets.
PIMSM (described in Chapter 4 of this guide) is used in networks where multicast sources and group members are sparsely distributed over a wide area and can result in unnecessary multicast traffic on routers outside the distribution paths needed for traffic between a given multicast source and the hosts belonging to the multicast group. In such networks, PIM-SM can be used to reduce the effect of multicast traffic flows in network areas where they are not needed. And because PIM-SM does not automatically flood traffic, it is a logical choice in lower bandwidth situations such as WAN environments.

Q: 3
Which switch is best suited to act at the edge of a medium to large HP FlexFabric solution?
A. 10500
B. 5500
C. 9500
D. 5830
Answer: D
Explanation: D: The HP 5830AF Switch Series is a family of high-density 1 GbE top-of-rack data center and campus switches that are a part of the HP FlexFabric solution module of the HP FlexNetwork architecture. The two models, the 5830AF-48G and 5830AF-96G switches, are
ideally suited for deployments at the server access layer in medium-sized and large enterprise data centers and campus networks.
Note: 5830 switches are typically in the edge, not the core.
Note 2: Flatten the network with Intelligent Resilient Framework Intelligent Resilient Framework (IRF) overcomes the limitations of legacy spanning tree designs by providing rapid failover for delay-sensitive, mission-critical applications and dramatically improving network utilization and performance in the network core.
By deploying IRF in conjunction with highly-scalable 12500 switches in the core and 5830 GbE and 5820 10 GbE series switches in the access layer - IT can completely eliminate the requirement for a dedicated aggr egation layer as they scale-out data centers, and enjoy the
benefits of large Layer 2 domains with increased network uptime and simplified management.
IRF is an innovative HP switch platform virtualization technology that allows customers to dramatically simplify the design and operations of their data center and campus Ethernet networks.

Q: 4
Two HP 7500 switches, switch A and switch B, are implementing VRRP in VLAN 2 (VRID 2) and in VLAN 3 (VRID 3). Switch A is currently the master in both VRIDs. The network administrator enables load balancing on both VRIDs on both switches.
Which statement describes an effect of these commands?
A. Switch A becomes master in one VRID, and switch B becomes master in the other VRID.
B. Switch B requests and receives its own virtual MAC address in both VRIDs from switch A.
C. Switch A and switch B respond to ARP requests in both VLANs.
D. Switch A and switch B send out standard VRRP advertisements in both VLANs.
Answer: B

Q: 5
A network administrator enabled IPv6 on an HP 7500 switch and configured VLAN interface 10 with a link-local and global IPv6 address 2001:DB8:1:10::1/64. The network administrator now wants IPv6-capable endpoints connected to VLAN 10 to receive IPv6 addresses using stateless autoconfiguration.
Which step must the network administrator complete on the 7500 switch?
A. Set the managed configuration flag in RA messages.
B. Configure DHCPv6 relay on VLAN interface 10.
C. Re-enable RA messages on VLAN interface 10.
D. Configure the VLAN 10 interface to advertise prefix 2001:DB8:1:10::/64.
Answer: D
Explanation: IPv6 defines both a stateful and stateless address autoconfiguration mechanism. Stateless autoconfiguration requires no manual
configuration of hosts, minimal (if any) configuration of routers, and no additional servers. The stateless mechanism allows a host to
generate its own addresses using a combination of locally available information and information advertised by routers. Routers advertise
prefixes that identify the subnet(s) associated with a link, while hosts generate an "interface identifier" that uniquely identifies an
interface on a subnet. An address is formed by combining the two.
Note: Stateless Auto Configuration is an important feature offered by the IPv6 protocol. It allows the various devices attached to an IPv6 network to connect to the Internet using the Stateless Auto Configuration without requiring any intermediate IP support in the form of a Dynamic Host Configuration Protocol (DHCP) server.
The stateless auto configuration process comprises of the following steps undertaken by a network device:
*Link-Local Address Generation - The device is assigned a link-local address. It comprises of
'1111111010' as the first ten bits followed by 54 zeroes and a 64 bit interface identifier.
* Link-Local Address Uniqueness Test - In this step, the networked device ensures that the link-local address generated by it is not already used by any other device i.e. the address is tested for its uniqueness.
* Link-Local Address Assignment - Once the uniqueness test is cleared, the IP interface is assigned the link local address. The address becomes usable on the local network but not over the Internet.
* Router Contact - The networked device makes contact with a local router to determine its next course of action in the auto configuration process.
* Router Direction - The node receives specific directions from the router on its next course of action in the auto configuration process.
* Global Address Configuration - The host configures itself with its globally unique Internet address. The address comprises of a network prefix provided by the router together with the device identifier.
Reference: RFC 2462, IPv6 Stateless Address Auto-configuration

Q: 6
A company has a network that includes HP 5800 and 12500 switches. Usage demands on the company's FTP servers have increased, causing performance issues during peak usage times.
While analyzing link utilization, the network administrator noticed that the most heavily utilized links experience bursts of congestion, causing them to drop traffic. The links then experience brief periods of low utilization followed by another burst of congestion. This pattern continues
periodically throughout the peak utilization time.
What should the network administrator do to attempt to create a more efficient traffic pattern on these links?
A. Configure an outbound traffic policing policy on the ports in question, setting the CIR at about sixty percent of the ports' capacity and the PIR at about eighty percent.
B. Apply Weighted Fair Queuing (WFQ) or Weighted Round Robin (WRR) scheduling in preference to Strict Priority (SP) scheduling on the ports in question.
C. Configure inbound traffic policing policies on ports at the core, setting the CIR at about sixty percent of the ports' capacity and the PIR at about eighty percent. Apply outbound generic traffic
shaping (GTS) on ports facing the core ports, setting the CIR equal to the CIR on the core ports.
D. Apply a WRED table to the ports in question, optionally adjusting the table values to drop lower priority traffic first.
Answer: C
Note: The following types of queueing methods and traffic regulation mechanisms are supported
* Modified Deficit Round Robin (MDRR)
* Low-latency queueing (LLQ) with strict priority queueing (PQ)
* Traffic shaping
Traffic shaping provides measures to adjust the rate of outbound traffic actively.
* Traffic policing
A typical application of traffic policing is to supervise the specification of certain traffic entering a network and limit it within a reasonable range, or to "discipline" the extra traffic.
Traffic policing also a certain amount of bandwidth management by allowing you to set the burst size (Bc) for the committed information rate (CIR). When the peak information rate (PIR) is supported, a second token bucket is enforced and the traffic policer is then called a two-rate
Reference: HP 5800 Switch Series, Product OverView
Reference: HP 12500 Switch Series, Product OverView

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