HP HP Certifications HPE7-A01 Questions & Answers

• Question 101:

  Which statements are true about VSX LAG? (Select two.)

  A. The total number of configured links may not exceed 8 for the pair or 4 per switch

  B. Outgoing traffic is switched to a port based on a hashing algorithm which may be either switch in the pair

  C. LAG traffic is passed over VSX ISL links only while upgrading firmware on the switch pair

  D. Outgoing traffic is preferentially switched to local members of the LAG.

  E. Up to 255 VSX lags can be configured on all 83xx and 84xx model switches.

  Correct Answer: AD

  Explanation: The correct answers are A and D. According to the web search results, VSX LAG is a feature that allows multiple PSKs to be used on a single SSID, providing device-specific or group-specific passphrases for enhanced security and deployment flexibility for headless IoT devices1. VSX LAGs span both aggregation switches and appear as one device to partner downstream or upstream devices or both when forming a LAG with the VSX pair2. One of the statements that is true about VSX LAG is that the total number of configured links may not exceed 8 for the pair or 4 per switch1. This means that a VSX LAG across a downstream switch can have at most a total of eight member links, and a switch can have a maximum of four member links. When creating a VSX LAG, it is recommended to select an equal number of member links in each segment for load balancing1. Another statement that is true about VSX LAG is that outgoing traffic is preferentially switched to local members of the LAG2. This means that when active forwarding and active gateway are enabled, north-south and south-north traffic bypasses the ISL link and uses the local ports on the switch. This optimizes the traffic path and reduces the load on the ISL link2. The other statements are false or not relevant for VSX LAG. Outgoing traffic is not switched to a port based on a hashing algorithm, which may be either switch in the pair. This is a characteristic of MLAG (Multi-Chassis Link Aggregation), which is a different feature from VSX LAG. LAG traffic is not passed over VSX ISL links only while upgrading firmware on the switch pair. This is a scenario that may occur when performing hitless upgrades, which is a feature that allows software updates without impacting network availability. The number of VSX lags that can be configured on all 83xx and 84xx model switches is not 255, but depends on the switch model and firmware version. For example, the AOS-CX 10.04 supports up to 64 VSX lags for 8320 switches and up to 128 VSX lags for 8325 and 8400 switches.

• Question 102:

  What is an OSPF transit network?

  A. a network that uses tunnels to connect two areas

  B. a special network that connects two different areas

  C. a network on which a router discovers at least one neighbor

  D. a network that connects to a different routing protocol

  Correct Answer: A

  Explanation: An OSPF transit network is a network that has at least two routers that are connected by a multi-access link and can forward traffic for other networks1. A transit network is different from a stub network, which has only one router connected to it and does not forward traffic for other networks2. A transit network is also different from a virtual link, which is a logical connection between two areas that are not physically adjacent2. A transit network is not necessarily connected to a different routing protocol, although it can be if the router performs redistribution2. Therefore, the correct answer is C. A network on which a router discovers at least one neighbor.

• Question 103:

  What does the 802.3bz standard describe?

  A. 2.5Gb and 5Gb Ethernet ports

  B. 60 W and 90W PoE

  C. AP directed roaming between APs

  D. 60 GHz P2P Wi-Fi

  Correct Answer: A

  Explanation: 802.3bz is a standard for Ethernet over twisted pair at speeds of 2.5 and 5 Gbit/s. These use the same cabling as the ubiquitous Gigabit Ethernet, yet offer higher speeds. The resulting standards are named 2.5GBASE-T and

  5GBASE-T.

  Option A: 2.5Gb and 5Gb Ethernet ports

  This is because option A shows how to identify the speed of an Ethernet port based on its name and the standard it supports. A port that supports 2.5GBASE-T or 5GBASE-T is a multi-gigabit port that can operate at speeds of up to 2.5 Gbit/s

  or 5 Gbit/s over twisted pair cables23.

  Therefore, option A is correct.

  1: https://en.wikipedia.org/wiki/2.5GBASE-T_and_5GBASE-T 2: https://kb.netgear.com/000049004/What-is-Multi-Gigabit-Ethernet-and-how-can-I-benefit- from-using-NETGEAR-Multi-Gigabit-Ethernet-Switches-in-my-network 3: https:// arstechnica.com/gadgets/2016/09/5gbps-ethernet-standard-details-8023bz/

• Question 104:

  Your Director of Security asks you to assign AOS-CX switch management roles to new employees based on their specific job requirements After the configuration was complete, it was noted that a user assigned with the administrators role did not have the appropriate level of access on the switch.

  The user was not limited to viewing nonsensitive configuration information and a level of 1 was not assigned to their role.

  Which default management role should have been assigned for the user?

  A. sysadmin

  B. operators

  C. helpdesk

  D. config

  Correct Answer: B

  Explanation: The default management role that should have been assigned for the user is B. operators.

  The operators user role is a predefined role that allows users to view nonsensitive configuration information on the switch, such as interfaces, VLANs, routing protocols, statistics, and more. The operators user role has a privilege level of 1,

  which is the lowest level of access on the switch1.

  The administrators user role is a predefined role that has full access to all switch configuration information and all REST API methods. This role is more than what the Director of Security requires1.

• Question 105:

  A customer just upgraded aggregation layer switches and noticed traffic dropping for 120 seconds after the aggregation layer came online again. What is the best way to avoid having this traffic dropped given the topology below?

  

  A. Configure the linkup delay timer to 240 seconds to double the amount of lime for the initial phase to sync

  B. Configure the linkup delay timer to exclude LAGS 101 and 102, which will allow time for routing adjacencies to form and to learn upstream routes

  C. Configure the linkup delay timer to include LAGs 101 and 102, which will allow time for routing adjacencies lo form and to learn upstream routes

  D. Configure the linkup delay timer to 120 seconds, which will allow the right amount of time for the initial phase to sync

  Correct Answer: C

  Explanation: The reason is that the linkup delay timer is a feature that delays bringing downstream VSX links up, following a VSX device reboot or an ISL flap. The linkup delay timer has two phases: initial synchronization phase and link-up delay phase. The initial synchronization phase is the download phase where the rebooted node learns all the LACP+MAC+ARP+STP database entries from its VSX peer through ISLP. The initial synchronization timer, which is not configurable, is the required time to download the database information from the peer. The link-up delay phase is the duration for installing the downloaded entries to the ASIC, establishing router adjacencies with core nodes and learning upstream routes. The link-up delay timer default value is 180 seconds. Depending on the network size, ARP/routing tables size, you might be required to set the timer to a higher value (maximum 600 seconds). When both VSX devices reboot, the link-up delay timer is not used. Therefore, by configuring the linkup delay timer to include LAGs 101 and 102, which are part of the same VSX device as LAG 201, you can ensure that both devices have enough time to synchronize their databases and form routing adjacencies before bringing down their downstream links.

• Question 106:

  Which statements are true regarding a VXLAN implementation on Aruba Switches? (Select two.)

  A. MTU size must be increased beyond the default

  B. VNIs encapsulate and decapsulate VXLAN traffic

  C. VTEPs encapsulate and decapsulate VXLAN traffic

  D. They are only available for datacenter switches (CX 8k, 9k,10k)

  E. All Aruba CX switches support VXLAN.

  Correct Answer: AB

  Explanation: Option A: MTU size must be increased beyond the default This is because option A shows how to configure the MTU size for VXLAN tunnels on Aruba switches using the interface command and the vxlan command. The MTU size must be increased beyond the default value of 1500 bytes to accommodate the VXLAN header and payload2. Therefore, option A is true regarding a VXLAN implementation on Aruba switches. Option B: VNIs encapsulate and decapsulate VXLAN traffic This is also true regarding a VXLAN implementation on Aruba switches. VNIs are used to encapsulate and decapsulate VXLAN traffic between two devices, such as a switch and a server. VNIs are also used to map VXLAN tunnels to overlay networks3. Therefore, option B is also true regarding a VXLAN implementation on Aruba switches. VXLAN is a Layer 2 encapsulation technology that substitutes the usage of VLAN numbers to label Ethernet broadcast domains with VXLAN numbers. VXLAN supports 224 Ethernet broadcast domains or VXLAN numbers. A VXLAN number ID is referred to as VNI. There is a one-to-one relationship between an Ethernet broadcast domain and a VNI. A single Ethernet broadcast domain can't have more than one VNI.

• Question 107:

  Which Aruba AP mode is sending captured RF data to Aruba Central for waterfall plot?

  A. Hybrid Mode

  B. Air Monitor

  C. Spectrum Monitor

  D. Dual Mode

  Correct Answer: C

  Explanation: Spectrum Monitor is an Aruba AP mode that is sending captured RF data to Aruba Central for waterfall plot. Spectrum Monitor is a mode that allows an AP to scan all channels in both 2.4 GHz and 5 GHz bands and collect information about the RF environment, such as interference sources, noise floor, channel utilization, etc. The AP then sends this data to Aruba Central, which is a cloud-based network management platform that can display the data in various formats, including waterfall plot. Waterfall plot is a graphical representation of the RF spectrum over time, showing the frequency, amplitude, and duration of RF signals. The other options are incorrect because they are either not AP modes or not sending RF data to Aruba Central. References: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos- solutions/1-overview/spectrum_monitor.htm https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos- solutions/1-overview/waterfall_plot.htm https://www.arubanetworks.com/products/network- management-operations/aruba-central/

• Question 108:

  A customer has a large number of food-producing machines

  All machines are connected via Aruba CX6200 switches in VLANs 100.110. and 120 Several external technicians are maintaining this special equipment

  What are the correct commands to ensure that no rogue DHCP server will impact the network?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: B

  Explanation: configures DHCP snooping on the switch and enables it for VLANs 100, 110, and 120. It also specifies the IP address of the authorized DHCP server and sets the ports connected to the server as trusted. This prevents any unauthorized DHCP server from providing invalid configuration data to the clients on those VLANs. Option B also enables DHCP option-82, which adds information about the switch port and VLAN to the DHCP packets, allowing for more granular control and logging of DHCP transactions.

• Question 109:

  You are configuring an SVI on an Aruba CX switch that needs to have the following characteristics:

  VLANID = 25 IPv4 address 10 105 43 1 with mask 255 255 255.0 IPv6 address fd00:5708::f02d:4df6 with a 64 bit prefix length member of VRF eng VRF eng and VLAN 25 have not yet been created

  Which command lists will satisfy the requirements with the least number of commands?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: C

  Explanation: The other options either use more commands or do not create the VRF or the VLAN.

  Option C uses the following commands:

  vrf eng: This command creates a VRF named eng and enters the VRF configuration mode1.

  vlan 25: This command creates a VLAN with ID 25 and enters the VLAN configuration mode2.

  interface vlan 25: This command creates an SVI on VLAN 25 and enters the interface configuration mode3.

  ip address 10.105.43.1/24 ipv6 address fd00:5780::102d:4df6/64 vrf attach eng:

  This command assigns an IPv4 address of 10.105.43.1 with a subnet mask of 255.255.255.0 and an IPv6 address of fd00:5780::102d:4df6 with a prefix length of 64 to the SVI, and attaches it to the VRF eng.

• Question 110:

  Match the solution components of NetConductor (Options may be used more than once or not at all.)

  Select and Place:

  

  Correct Answer:

  

  Client Insights matches with Built in , AI powered client visibility and fingerprinting capability that leverages infrastructure telemetry and ML based classification models to eliminate network bling spots

  Client Insights is a solution component of NetConductor that provides built-in, AI-powered client visibility and fingerprinting capability that leverages infrastructure telemetry and MLbased classification models to eliminate network blind spots.

  Client Insights uses machine learning to automatically detect, identify, and classify devices on the network, such as IoT devices, BYOD devices, or rogue devices. Client Insights also provides behavioral analytics and anomaly detection to

  monitor device performance and security posture. Client Insights helps network administrators gain visibility into the device landscape, enforce granular access policies, and troubleshoot issues faster.

  References:

  https://www.arubanetworks.com/products/network-managementoperations/central/netconductor/

  https://www.arubanetworks.com/assets/wp/WP_NetConductor.pdf