HP HPE6-A85 Exam Practice Test Instant Access

Question 1

What is used by network devices to send error and operational information related to IP communications?

AFrame Check Sequence (FCS)

BUser Datagram Protocol (UDP)

CCyclic Redundancy Check (CRC)

DInternet Control Message Protocol (ICMP)

Answer : D

ICMP (Internet Control Message Protocol) is used by network devices to send error and operational information related to IP communications. It is used to send messages like 'destination unreachable' or 'time exceeded' when there are issues in IP communication

Question 2

The customer requires two Aruba CX 6200F 48G switches to be connected to each other with a distance of 80m/252ft between wiring closets. Switches need to have reservation for VSF expansion with ring

topology in each cabinet.

What is a valid configuration for a redundant link-aggregation port configuration?

APorts 1/1/49 and 1/1/50 with SFP28 for LAG

BPorts 1/1/47 and 1/1/48 for LAG

CPorts 1/1/1 and 1/1/2 for LAG

DPorts 1/1/51 and 1/1/52 with SFP+ for LAG

Answer : D

For an 80m distance between wiring closets, using SFP+ transceivers is appropriate as they can support longer distances than standard copper interfaces. Ports 1/1/51 and 1/1/52 are typically reserved for uplinks on Aruba CX 6200F 48G switches and can support SFP+ transceivers, making them suitable for a redundant link-aggregation port configuration.

Question 3

SWhat are two characteristics of ClientMatch? (Select two.)

AIt optimizes channels of an AP.

BAn algorithm to adjust RF patterns.

CIt is used to locate a client.

DIt is an Aruba patented technology.

EIt helps to move sticky clients to another AP.

Answer : D, E

ClientMatch is an Aruba patented technology that helps to move sticky clients---clients that stay connected to an AP even when there are better APs available---to a more appropriate AP. This technology ensures that clients are always connected to the best available AP, optimizing both the client's performance and the overall performance of the wireless network.

Question 4

What does a wireless client do first when its countdown timer reaches zero and it receives a Transmit Opportunity (TXOP)?

AIt immediately sends its Data Frames and receives an ACK from the AP.

BIt sends a CTS-to-self announcement to the ESP gateway.

CIt sends a CTS-to-self announcement to the AP and all other clients.

DIt sends a reassociation request frame to the AP and sends its Data Frames.

Answer : A

When a wireless client's countdown timer (also known as a backoff timer) reaches zero during contention-based access periods, and it receives a Transmit Opportunity (TXOP), it has the right to transmit its data frames on the medium. After sending the data frames, it expects an acknowledgment (ACK) from the Access Point (AP) to ensure the frames were received successfully.

Question 5

Describe the functionality of ARP.

AClients do not have an ARP cache and always ask for the default gateway.

BARP maps MAC addresses to switch ports.

CARP maps layer-3 IP addresses to layer-2 MAC addresses.

DARP uses multicast to build the ARP table.

Answer : C

The Address Resolution Protocol (ARP) is used to map layer-3 IP addresses to layer-2 MAC addresses. When a device on a network wants to communicate with another device, it uses ARP to find the MAC address that corresponds to the IP address it wishes to communicate with, allowing it to construct a frame for the local network.

Question 6

Which statement is true for a device with a MAC address of B8-31-B5-80-41-4F?

AThe device OUI is B8-31-B5 and the device NIC serial number is 80-41-4F

BThe device OUI is B8-31 and the device NIC serial number is B5-80-41-4F

CThe device OUI is 80-41-4F and the device NIC serial number is B8-31-B5

DThe device OUI is B8-31-B5 and the device serial number is MD5 hash is 80-41-4F

Answer : A

A MAC address is divided into two parts: the Organizationally Unique Identifier (OUI) and the Network Interface Controller (NIC) serial number. The OUI is the first three octets of the MAC address and is unique to the manufacturer. The NIC serial number is the last three octets and is unique to the device itself. Therefore, for the MAC address B8-31-B5-80-41-4F, the OUI is B8-31-B5, and the NIC serial number is 80-41-4F.

Question 7

After having configured the edge switch uplink as requested your colleague says that they have failed to ping the core You ask your colleague to verify the connection is plugged in and the switch is powered on They confirm that both are correct You attempt to ping the core switch and confirm that the ping is failing.

Knowing the nature of this deployment, what commands might you use to troubleshoot this issued

APing 10.11 1 - ping the core to attempt to verify connectivity Show trunk - to verify if the LAG interface was correctly added to the switch Show spanning tree - to check for spanning-tree blocked states Show port-access clients interface all - to view any port-access blocking states or failed authentication attempts on all interfaces Show run interface vlan20 - to double check the layer 3 svi configuration is correct for l_3 connectivity Show lldp neighors - to verify whether you are able to see the Core as an L2 neighbor to verify if the correct links are plugged in to the correct ports

Bdiagnostic diag cable-diag 1/1/51 diag cable-diag 1/1/52 - to view diagnostic information for the physical link to get a status on any interruptions to Layer 1 connectivity, show ip route - to verify that the default gateway is present in the routing table show ip ospf - to check whether there is a layer 3 routing protocol enabled show ip dns - to view whether there is a valid dns source

CPing 10.1.1.1 - ping the core to attempt to verify connectivity show lacp agg - to verify which link aggregations are currently configured using which physical ports show lacp int - to verify the LACP status and whether any links are blocking in your topology show lldp neighors - to verify whether you are able to see the Core as an L2 neighbor to verify if the correct links are plugged in to the correct ports show run interface 1/1/51.1/1/52-to ensure the physical interfaces are no-shut and members of the lag show run interface lag 1 - to ensure the correct vlan trunking configuration is applied to the logical interface show run int vlan 20 - to ensure you have the L3 SVI no shut and configured in the correct subnet

DShow run - to view the running configuration of the switch Show run | begin 20 'vlan 20' - to ensure VLAN 20 was correctly added to the database show run | begin 20 'interface vlan 20' - to view the L3 SVI configuration Show run interface 1/1/51.1/1/52 - to ensure the physical interfaces are no shut and were added as members of LAG 1 Show run int lag 1 - to verify LACP mode active was configured to eliminate LACP blocking states

Answer : C

These commands might help troubleshoot this issue as they check various aspects of the connectivity between the edge switch and the core switch, such as Layer 3 reachability, Layer 2 adjacency, LACP configuration and status, VLAN trunking configuration, and interface status. Reference: https://www.arubanetworks.com/techdocs/AOS-CX_10_04/CLI/GUID-8F0E7E8B-0F4B-4A3C-AE7F-0F1B5A7F9C5D.html

HPE6-A85 Aruba Certified Campus Access Associate Exam Practice Test