HPE Network Switching Associate HPE6-A86 Exam Questions

Answer : C

The correct answer is C. In-band management uses the production switching network rather than the dedicated out-of-band management port. For an HPE Aruba Networking CX 4100i switch, HPE Aruba Networking AOS-CX documentation states that configuring the in-band management interface begins by entering interface vlan 1. The guide then shows that the in-band management interface can be configured with DHCP or with a static IP address. Therefore, assigning ip address 10.10.10.10/24 under interface vlan 1 is the correct in-band management configuration from the choices. Option A is incorrect because interface mgmt is the out-of-band management interface, not in-band management. Option D is also out-of-band for the same reason. Option B is not the best answer because routing is not required under the VLAN interface for this in-band management IP configuration. The essential configuration is the VLAN interface with the static IP address

Answer : D

The correct answer is D. Create VSF on the CX 6200 switches and a LAG between the CX 6200 and 2530 switches. HPE Aruba Networking documentation explains that VSF allows multiple individual switches to operate as a single logical device using standard Ethernet links. The CX 6200 supports VSF stacking, so two CX 6200 aggregation switches can be combined into a single logical aggregation switch. HPE Aruba Networking Layer 2 documentation also describes link aggregation as grouping individual physical interfaces into a single logical link, increasing bandwidth and providing resiliency when links fail. In this design, the 2530 access switch can use two uplink ports in a trunk/LAG toward the aggregation layer, while the CX 6200 side operates as one logical switch because of VSF. Option A is incorrect because a CX 6200 and a 2530 cannot be placed into one common VSF stack. Option B is incorrect for the same reason: the 2530 is not stacked with the CX 6200. Option C is incomplete because a LAG from one access switch to two separate aggregation switches requires the aggregation side to act as one logical switch, which is provided by VSF in option D.

Answer : B

The correct answer is B. Transport Layer. Data segmentation is a Transport Layer function. At Layer 4, protocols such as TCP divide application data into smaller pieces called segments so that data can be transported between endpoints. The Transport Layer also uses TCP and UDP port numbers to identify application conversations between hosts. HPE Aruba Networking AOS-CX ACL documentation references TCP/UDP ports as Layer 4 ports, which aligns transport-layer port usage with the Transport Layer. The Application Layer provides user-facing application services, but it does not perform transport segmentation. The Network Layer handles logical IP addressing and routing. The Data Link Layer handles Ethernet framing, MAC addressing, and local delivery on a network segment. Therefore, when the question asks where data segmentation occurs in the OSI model, the correct answer is the Transport Layer. (arubanetworking.hpe.com)

Answer : A

The correct answer is A. Change the hash algorithm. In a LAG, traffic is not normally split packet-by-packet across every member link. Instead, the switch uses a hashing method to choose which physical interface in the aggregate should transmit each flow. The output shows that the current hash is l3-src-dst, which means the load-balancing calculation uses Layer 3 source and destination IP information. If many flows share the same source and destination IP pair, traffic can be unevenly distributed, causing one link to become congested while another link is lightly used. HPE Aruba Networking AOS-CX documentation states that the lacp hash command controls the selection of an interface in an aggregate group and supports Layer 2, Layer 3, and Layer 4 source/destination hash options. Changing the hash algorithm, for example to include Layer 4 source and destination TCP/UDP ports, can improve distribution when Layer 3 values alone are not diverse enough. Changing LACP mode, configuring static LAG, or changing LACP heartbeat rate would not directly fix uneven traffic distribution.

Answer : A

The correct answer is A. Configure an SVI for each VLAN. Hosts in different VLANs are in different Layer 2 broadcast domains, so they cannot communicate directly through normal switching alone. To enable communication between VLANs, the switch must provide Layer 3 gateway interfaces for those VLANs. On HPE Aruba Networking CX switches, this is done with switched virtual interfaces, or SVIs, using interface vlan <VLAN-ID> and assigning an IP address to each VLAN interface. HPE Aruba Networking documentation shows Layer 3 VLAN interfaces using interface vlan with an IP address, and also refers to an SVI as the Layer 2 VLAN interface IP address used by the switch. Option B is not the best answer because simply enabling IP forwarding does not create gateway interfaces for the VLANs. Option C is incorrect because trunking VLANs to another Layer 2 switch only extends VLANs; it does not route between them. Option D is incorrect because VLANs separate Layer 2 domains, and inter-VLAN communication requires routing, not bridging.

Answer : B

The correct answer is B. Configure an IP helper for the DHCP server. The IoT device is connected to VLAN 100, whose Layer 3 SVI is 10.100.1.1/24. The DHCP server is 10.200.1.51, which is in a different subnet. DHCP clients initially use broadcast messages to discover a DHCP server, and those broadcasts do not cross Layer 3 boundaries by default. HPE Aruba Networking AOS-CX documentation explains that DHCP relay forwards DHCP client requests to configured DHCP servers, and that the ip helper-address command defines the address of a remote DHCP server or relay agent. The documentation also states that IP helper addresses can be configured on Layer 3 interfaces, Layer 3 VLAN interfaces, and LAG interfaces. Therefore, the correct fix is to configure ip helper-address 10.200.1.51 under interface vlan100. Disabling STP is not appropriate and could create Layer 2 loop risk. A static route may be needed for reachability in some designs, but it does not relay DHCP broadcasts. Broadcast-to-unicast conversion is not the required AOS-CX DHCP relay configuration.

Answer : A

The correct answer is A. 10G-DAC. The limiting device in this connection is the CX 6200. HPE Aruba Networking CX 6200 models use built-in high-speed uplinks, and the CX 6200 product listings identify models with 4SFP+ uplinks. SFP+ uplinks support 10G, not 25G, 50G, or 100G single-port connectivity. HPE Aruba Networking transceiver guidance also notes that CX 6200 switches support split-side SFP connections only in available 10G-capable SFP ports, and that 50G transceivers can only be used in ports capable of 50G speeds, such as SFP56-capable ports. Therefore, even though the CX 8100 supports higher-speed connectivity options, the shared validated single-port option between the two switch families is 10G over DAC for a short 3-meter connection. Option B is incorrect because the CX 6200 does not have 100G ports. Option C is incorrect because 25G-LR is not the best validated 3-meter option and exceeds the CX 6200 SFP+ port capability. Option D is incorrect because 50G-DAC requires 50G-capable ports.