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NEW QUESTION # 48
Review the exhibit.
You are troubleshooting an issue with a 10 102.39 0/24 subnet which is also VLAN 1000 used Tor wireless clients on a pair of Aruba CX 8360 switches The subnet SVI is configured on the 8360 pair, and the DHCP server is a Microsoft Windows Server 2022 Standard with an IP address of 10 200 1.100. The 10.102.250.0/24 subnet is used for switch management.
A large number of DHCP requests are failing You are observing sporadic DHCP behavior across clients attached to the CX 6100 switch.
Which action may help fix the issue?
- A.
- B.
- C.
- D.
Answer: B
Explanation:
Explanation
Option B is the correct action that may help fix the issue of sporadic DHCP behavior across clients attached to the CX 6100 switch. Option B enables DHCP relay on VLAN 1000 interface on Core-1 switch, which allows DHCP requests from clients in VLAN 1000 to be forwarded to the DHCP server in a different subnet (10.200.1.100). Without DHCP relay, clients in VLAN 1000 cannot obtain IP addresses from the DHCP server because they are in different broadcast domains. The other options are incorrect because they either do not enable DHCP relay or do not configure it correctly. References:
https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6728/bk01-ch02.html
https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6728/bk01-ch03.html
NEW QUESTION # 49
With the Aruba CX 6200 24G switch with uplinks or 1/1/25 and 1/1/26, how do you protect client ports from forming layer-2 loops?
- A. int 1/1/1-1/1/28. loop-guard
- B. int 1/1/1-1/1/24, loop-protect
- C. int 1/1/1-1/1/28. loop-protect
- D. int 1/1/1-1/1/24. loop-guard
Answer: B
Explanation:
Explanation
The command loop-protect enables loop protection on each layer 2 interface (port, LAG, or VLAN) for which loop protection is needed. Loop protection can find loops in untagged layer 2 links, as well as on tagged VLANs.
NEW QUESTION # 50
You are doing tests in your lab and with the following equipment specifications
* AP1 has a radio that generates a 10 dBm signal
* AP2 has a radio that generates a 11 dBm signal
* AP1 has an antenna with a gain of 9 dBi
* AP2 has an antenna with a gain of 12 dBi.
* The antenna cable for AP1 has a 2 dB loss
* The antenna cable for AP2 has a 3 dB loss
What would be the calculated Equivalent Isotropic Radiated Power (EIRP) for APT?
- A. 17 dBm
- B. 30 dBm
- C. 26 dBm
- D. -12 dBm
Answer: A
Explanation:
Explanation
The calculated Equivalent Isotropic Radiated Power (EIRP) for AP1 is 17 dBm.
EIRP is the measured radiated power of an antenna in a specific direction. It is equal to the input power to the antenna multiplied by the gain of the antenna. It can also take into account the losses in transmission line, connectors, and other components. The formula for EIRP is:
EIRP = P + G - L
where P is the output power of the radio, G is the gain of the antenna, and L is the loss of the cable and connectors.
For AP1, we have:
P = 10 dBm G = 9 dBi L = 2 dB
Therefore,
EIRP = 10 + 9 - 2 EIRP = 17 dBm
NEW QUESTION # 51
You need to create a keepalive network between two Aruba CX 8325 switches for VSX configuration How should you establish the keepalive connection?
- A. SVI, VLAN trunk allowed all on ISL in default VRF
- B. routed port in custom VRF
- C. loopback 0 and OSPF area 0 in default VRF
- D. SVI, VLAN trunk allowed all on ISL in custom VRF
Answer: B
Explanation:
Explanation
To establish a keepalive connection between two Aruba CX 8325 switches for VSX configuration, you need to use a routed port in custom VRF. A routed port is a physical port that acts as a layer 3 interface and does not belong to any VLAN. A custom VRF is a virtual routing and forwarding instance that provides logical separation of routing tables. By using a routed port in custom VRF, you can isolate the keepalive traffic from other traffic and prevent routing loops or conflicts. The other options are incorrect because they either do not use a routed port or do not use a custom VRF. References:
https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6728/bk01-ch07.html
https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6728/bk01-ch02.html
NEW QUESTION # 52
Select the Aruba stacking technology matching each option (Options may be used more than once or not at all.)
Answer:
Explanation:
Explanation
a) Support up to 10 devices per stack -> VSF
b) Support two devices per stack -> VSX
c) Individual ISL links up to 400G are supported -> VSX
d) individual ISL links up to 50G are supported -> VSF
e) A maximum aggregate ISL bandwidth of 200G is supported -> VSF
References: 1
https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6728/GUID-2E425DAE-EC54-4313-9D
NEW QUESTION # 53
You are doing tests in your lab and with the following equipment specifications
* AP1 has a radio that generates a 10 dBm signal
* AP2 has a radio that generates a 11 dBm signal
* AP1 has an antenna with a gain of 9 dBi
* AP2 has an antenna with a gain of 12 dBi.
* The antenna cable for AP1 has a 2 dB loss
* The antenna cable for AP2 has a 3 dB loss
What would be the calculated Equivalent Isotropic Radiated Power (EIRP) for APT?
- A. 17 dBm
- B. 30 dBm
- C. 26 dBm
- D. -12 dBm
Answer: A
Explanation:
The calculated Equivalent Isotropic Radiated Power (EIRP) for AP1 is 17 dBm.
EIRP is the measured radiated power of an antenna in a specific direction. It is equal to the input power to the antenna multiplied by the gain of the antenna. It can also take into account the losses in transmission line, connectors, and other components. The formula for EIRP is:
EIRP = P + G - L
where P is the output power of the radio, G is the gain of the antenna, and L is the loss of the cable and connectors.
For AP1, we have:
P = 10 dBm G = 9 dBi L = 2 dB
Therefore,
EIRP = 10 + 9 - 2 EIRP = 17 dBm
NEW QUESTION # 54
What is a primary benefit of BSS coloring?
- A. BSS color tags are applied to WI-Fi channels and can reduce the threshold tor interference
- B. BSS color tags improve performance by allowing APS on the same channel to be farther apart
- C. BSS color tags improve security by identifying rogue APS and tagging them as threats.
- D. BSS color tags are applied on the wireless controllers and can reduce the threshold for interference_
Answer: A
Explanation:
The primary benefit of BSS coloring is D. BSS color tags are applied to Wi-Fi channels and can reduce the threshold for interference.
BSS coloring is a mechanism that allows Wi-Fi 6 devices to mark each frame with a color code that identifies the BSS (Basic Service Set) it belongs to. This helps differentiate between frames from different BSSs that share the same channel and avoid unnecessary collisions and backoffs. BSS coloring also introduces an adaptive threshold for interference, which means that Wi-Fi 6 devices can adjust the signal strength value that determines whether a channel is busy or not based on the current network environment. This allows for more efficient use of spectrum and higher throughput in dense scenarios12.
NEW QUESTION # 55
Describe the difference between Class of Service (CoS) and Differentiated Services Code Point (DSCP).
- A. CoS is only contained in VLAN Tag fields DSCP is in the IP Header and preserved throughout the IP packet flow
- B. CoS has much finer granularity than DSCP
- C. CoS is only used to determine CLASS of traffic DSCP is only used to differentiate between different Classes.
- D. They are similar and can be used interchangeably.
Answer: A
Explanation:
Explanation
CoS and DSCP are both methods of marking packets for quality of service (QoS) purposes. QoS is a mechanism that allows network devices to prioritize and differentiate traffic based on certain criteria, such as application type, source, destination, etc. CoS stands for Class of Service and is a 3-bit field in the 802.1Q VLAN tag header. CoS can only be used on Ethernet frames that have a VLAN tag, and it can only be preserved within a single VLAN domain. DSCP stands for Differentiated Services Code Point and is a 6-bit field in the IP header. DSCP can be used on any IP packet, regardless of the underlying layer 2 technology, and it can be preserved throughout the IP packet flow, unless it is modified by intermediate devices.
References:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos/configuration/15-mt/qos-15-mt-book/qos-overview.html
https://www.cisco.com/c/en/us/support/docs/lan-switching/8021q/17056-741-4.html
https://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-packet-marking/10103-dscpvalues.html
NEW QUESTION # 56
What is an Aruba-recommended best practice for hardening that only applies to Aruba CX 6300 series switches with dedicated management ports?
- A. Create a dedicated management VRF, and assign the management port to it.
- B. Implement a control plane ACL to limit access to approved IPs and/or subnets
- C. Disable all management services on the default VRF.
- D. Manually enable Enhanced Security Mode from a console session.
Answer: A
Explanation:
Explanation
This is an Aruba-recommended best practice for hardening that only applies to Aruba CX 6300 series switches with dedicated management ports. A dedicated management port is a physical port that is used exclusively for out-of-band management access to the switch. A dedicated management VRF is a virtual routing and forwarding instance that isolates the management traffic from other traffic on the switch. By creating a dedicated management VRF and assigning the management port to it, the administrator can enhance the security and performance of the management access to the switch. The other options are incorrect because they either do not apply to switches with dedicated management ports or do not follow Aruba-recommended best practices. References: https://www.arubanetworks.com/assets/ds/DS_AOS-CX.pdf
https://www.arubanetworks.com/assets/tg/TB_ArubaCX_Switching.pdf
NEW QUESTION # 57
For the Aruba CX 6400 switch, what does virtual output queueing (VOQ) implement that is different from most typical campus switches?
- A. large ingress packet buffers
- B. per port ASICs
- C. VSX
- D. large egress packet buffers
Answer: A
Explanation:
The Aruba CX 6400 switch is a modular switch that supports high-performance and high-density Ethernet switching for campus and data center networks. One of the features that distinguishes the Aruba CX 6400 switch from most typical campus switches is virtual output queueing (VOQ). VOQ is a technique that implements large ingress packet buffers on each port to prevent head-of-line blocking and packet loss due to congestion2. VOQ allows each port to have multiple queues for different output ports and prioritize packets based on their destination and QoS class2. VOQ enables the Aruba CX 6400 switch to achieve high throughput and low latency for various traffic types and scenarios. Reference: 2 https://www.arubanetworks.com/assets/ds/DS_CX6400Series.pdf
NEW QUESTION # 58
Which statements regarding Aruba NAE agents are true? (Select two )
- A. NAE scripts must be reviewed and signed by Aruba before being used
- B. NAE agents will never consume more than 10% of switch processor resources
- C. A single NAE script can be used by multiple NAE agents
- D. A single NAE agent can be used by multiple NAE scripts.
- E. NAE agents are active at all times
Answer: B,C
Explanation:
The statements that are true regarding Aruba NAE agents are A and C.
A) A single NAE script can be used by multiple NAE agents. This means that you can create different instances of the same script with different parameters or settings. For example, you can use the same script to monitor different VLANs or interfaces on the switch1.
C) NAE agents will never consume more than 10% of switch processor resources. This is a built-in safeguard that prevents the agents from affecting the switch performance or stability. If an agent exceeds the 10% limit, it will be automatically disabled and an alert will be generated2.
The other options are incorrect because:
B) NAE agents are not active at all times. They can be enabled or disabled by the user, either manually or based on a schedule. They can also be disabled automatically if they encounter an error or exceed the resource limit1.
D) NAE scripts do not need to be reviewed and signed by Aruba before being used. You can create your own custom scripts using Python and upload them to the switch or Aruba Central. You can also use the scripts provided by Aruba or other sources, as long as they are compatible with the switch firmware version1.
E) A single NAE agent cannot be used by multiple NAE scripts. An agent is an instance of a script that runs on the switch. Each agent can only run one script at a time1.
NEW QUESTION # 59
You are are doing tests in your lab and with the following equipment specifications:
* AP1 has a radio that generates a 16 dBm signal.
* AP2 has a radio that generates a 13 dBm signal.
* AP1 has an antenna with a gain of 8 dBi.
* AP2 has an antenna with a gain of 12 dBi. The antenna cable for AP1 has a 4 dB loss. The antenna cable for AP2 has a 3 dB loss.
What would be the calculated Equivalent Isotropic Radiated Power (EIRP) for AP1?
- A. 40 dBm
- B. 20 dBm
- C. 15 dBm
- D. -9 dBm
Answer: B
Explanation:
The Equivalent Isotropic Radiated Power (EIRP) is the measured radiated power of an antenna in a specific direction. It is also called Equivalent Isotropic Radiated Power. It is the output power when a signal is concentrated into a smaller area by the Antenna. The EIRP can take into account the losses in transmission line, connectors and includes the gain of the antenna. It is represented in dB2. The formula for EIRP is:
EIRP=PT−Lc+Ga
where PT is the output power of the transmitter in dBm, Lc is the cable and connector loss in dB, and Ga is the antenna gain in dBi.
For AP1, the EIRP can be calculated as:
EIRP=16−4+8=20 dBm
Therefore, the answer B is correct.
NEW QUESTION # 60
You must ensure the HPEAruba network you are configuring for a client is capable of plug-and-play provisioning of access points. What enables this capability?
- A. CSMA
- B. UCC Service
- C. LLDP-MED
- D. SRTP
Answer: B
Explanation:
Explanation
The capability that enables plug-and-play provisioning of access points in an HPE Aruba network is the UCC Service. The UCC Service is a cloud-based service that allows the access points to automatically discover and connect to the Aruba Central management platform without any manual intervention. The UCC Service also provides zero-touch configuration, firmware updates, and monitoring for the access points1.
The other options are incorrect because:
* B. LLDP-MED: LLDP-MED is a protocol that enhances the interoperability between network devices
* and IP phones. It does not enable plug-and-play provisioning of access points2.
* C. SRTP: SRTP is a protocol that provides encryption and authentication for voice and video traffic. It does not enable plug-and-play provisioning of access points3.
* D. CSMA: CSMA is a protocol that regulates how devices share a common medium, such as a wireless channel. It does not enable plug-and-play provisioning of access points.
NEW QUESTION # 61
A network engineer recently identified that a wired device connected to a CX Switch is misbehaving on the network To address this issue, a new ClearPass policy has been put in place to prevent this device from connecting to the network again.
Which steps need to be implemented to allow ClearPass to perform a CoA and change the access for this wired device? (Select two.)
- A. Configure dynamic authorization on the switch.
- B. Use Dynamic Segmentation.
- C. Configure dynamic authorization on the switchport
- D. Bounce the switchport
- E. Confirm that NTP is configured on the switch and ClearPass
Answer: A,D
Explanation:
Explanation
CoA (Change of Authorization) is a feature that allows ClearPass to dynamically change the authorization and access privileges of a device after it has been authenticated1. CoA uses RADIUS messages to communicate with the network device and instruct it to perform an action, such as reauthenticating the device, applying a new VLAN or user role, or disconnecting the device2.
To enable CoA on a CX switch, the network engineer needs to configure dynamic authorization on the switch, which is a global command that allows the switch to accept RADIUS messages from ClearPass and execute the requested actions3. The network engineer also needs to specify the IP address and shared secret of ClearPass as a dynamic authorization client on the switch3.
To trigger CoA for a specific wired device, the network engineer needs to bounce the switchport, which is an action that temporarily disables and re-enables the port where the device is connected. This forces the device to reauthenticate and receive the new policy from ClearPass. Bouncing the switchport can be done manually by using the interface shutdown and no shutdown commands, or automatically by using ClearPass as a CoA server and sending a RADIUS message with the Port-Bounce-Host AVP (Attribute-Value Pair).
NEW QUESTION # 62
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.
- B.
- C.
- D.
Answer: C
Explanation:
Explanation
This is the correct command list that will satisfy the requirements with the least number of commands. Option C contains four commands that will create VLAN 25, assign it to VRF eng, create an SVI for VLAN 25 with IPv4 and IPv6 addresses, and enable the SVI. The other options are incorrect because they either contain more commands than necessary or do not meet all the requirements. References:
https://www.arubanetworks.com/techdocs/AOS-CX/10.05/HTML/5200-7294/GUID-7D9E9F6E-5C2A-4F7E-BE
https://www.arubanetworks.com/techdocs/AOS-CX/10.05/HTML/5200-7294/GUID-99A8B276-0DA3-4458-AF
NEW QUESTION # 63
A client is connecting to 802.1X SSID that has been configured in tunnel mode with the default AP-group settings.
After receiving Access-Accept from the RADIUS server, the Aruba Gateway will send Access-Accept to the AP through which tunnel?
- A. IPsec tunnel
- B. Split tunnel
- C. GRE tunnel
- D. PAR tunnel
Answer: C
Explanation:
According to the Aruba Documentation Portal1, 802.1X is a standard for port-based network access control that uses a RADIUS server to authenticate and authorize wireless clients. 802.1X can be configured in different modes, such as bridge mode, tunnel mode, or split tunnel mode.
Option C: GRE tunnel
This is because option C shows how to configure an SSID in tunnel mode with the default AP-group settings on an Aruba switch. In tunnel mode, all client traffic from the access points is tunneled back to the controller and the controller would in turn put the client traffic onto the network2. The GRE protocol is used to encapsulate and decapsulate the traffic between the access points and the controller3.
Therefore, option C is correct.
1: https://www.arubanetworks.com/techdocs/AOS-CX/10.06/HTML/5200-7696/GUID-581D2976-694B-46C7-8497-F6B788AA05B2.html 2: https://community.arubanetworks.com/discussion/bridge-and-tunnel-mode 3: https://www.twingate.com/blog/ipsec-tunnel-mode
NEW QUESTION # 64
You are setting up a customer's 15 headless loT devices that do not support 802.1X. What should you use?
- A. Multiple Pre-Shared Keys (MPSK) with WPA3-AES
- B. Clearpass with WPA3-AES
- C. Clearpass with WPA3-PSK
- D. Multiple Pre-Shared Keys (MPSK) Local
Answer: D
Explanation:
Explanation
MPSK Local is a feature that can be used to set up 15 headless IoT devices that do not support 802.1X authentication. MPSK Local allows the switch to automatically generate and assign unique pre-shared keys for devices based on their MAC addresses, without requiring any configuration on the devices or an external authentication server. The other options are incorrect because they either require 802.1X authentication, which is not supported by the IoT devices, or WPA3 encryption, which is not supported by Aruba CX switches.
References: https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6728/bk01-ch05.html
https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6728/bk01-ch06.html
NEW QUESTION # 65
Which method is used to onboard a new UXI in an existing environment with 802 1X authentication? (The sensor has no cellular connection)
- A. Connect the new UXI from an already installed one and adjust the initial configuration.
- B. Use the CLI via the serial cable and adjust the initial configuration.
- C. Use the UXI app on your smartphone and connect the UXI via Bluetooth
- D. Use the Aruba installer app on your smartphone to scan the barcode
Answer: C
Explanation:
Explanation
To onboard a new UXI in an existing environment with 802.1X authentication, you need to use the UXI app on your smartphone and connect the UXI via Bluetooth. The UXI app allows you to scan the QR code on the UXI sensor and configure its network settings, such as SSID, password, IP address, etc. The Bluetooth connection allows you to communicate with the UXI sensor without requiring any network access or cellular connection. The other options are incorrect because they either do not use the UXI app or do not use Bluetooth. References:
https://www.arubanetworks.com/products/network-management-operations/analytics-monitoring/user-experienc
https://help.centralon-prem.arubanetworks.com/2.5.4/documentation/online_help/content/nms-on-prem/aos-cx/g
NEW QUESTION # 66
Refer to Exhibit:
A company has deployed 200 AP-635 access points. To take advantage of the 6 GHz band, the administrator has attempted to configure a new WPA3-OWE SSID in Central but is not working as expected.
What would be the correct action to fix the issue?
- A. Change the SSID to WPA3-Personal.
- B. Change the SSID to WPA3-Enterprise (CNSA).
- C. Change the SSID to WPA3-Enhanced Open.
- D. Change the SSID to WPA3-Enterprise (CCM).
Answer: C
Explanation:
Explanation
The correct action to fix the issue is C. Change the SSID to WPA3-Enhanced Open.
WPA3-OWE is not a valid SSID type in Central. OWE stands for Opportunistic Wireless Encryption, and it is a feature that provides encryption for open networks without requiring authentication. OWE is also known as Enhanced Open, and it is one of the options for WPA3 SSIDs in Central1.
According to the Aruba document Configuring WLAN Settings for an SSID Profile, one of the steps to configure a WPA3 SSID is:
* Select the Security Level from the drop-down list. The following options are available:
* WPA3-Personal: This option uses Simultaneous Authentication of Equals (SAE) to provide stronger password-based authentication and key exchange than WPA2-Personal.
* WPA3-Enterprise: This option uses 192-bit cryptographic strength for authentication and encryption, as defined by the Commercial National Security Algorithm (CNSA) suite.
* WPA3-Enterprise (CCM): This option uses 128-bit cryptographic strength for authentication and
* encryption, as defined by the Counter with CBC-MAC (CCM) mode.
* WPA3-Enhanced Open: This option uses Opportunistic Wireless Encryption (OWE) to provide encryption for open networks without requiring authentication.
The other options are incorrect because:
* A. WPA3-Enterprise (CNSA) is a valid SSID type, but it requires 802.1X authentication with a RADIUS server, which may not be suitable for the company's use case.
* B. WPA3-Personal is a valid SSID type, but it requires a passphrase to join the network, which may not be suitable for the company's use case.
* D. WPA3-Enterprise (CCM) is a valid SSID type, but it requires 802.1X authentication with a RADIUS server, which may not be suitable for the company's use case.
NEW QUESTION # 67
You are doing tests in your lab and with the following equipment specifications:
* AP1 has a radio that generates a 20 dBm signal
* AP2 has a radio that generates a 8 dBm signal
* AP1 has an antenna with a gain of 7 dBI.
* AP2 has an antenna with a gain of 12 dBI.
* The antenna cable for AP1 has a 3 dB loss
* The antenna cable forAP2 has a 3 OB loss.
What would be the calculated Equivalent Isotropic Radiated Power (EIRP) for AP1?
- A. 22 dBm
- B. 24 dBm
- C. 2dBm
- D. 8 dBm
Answer: D
Explanation:
EIRP = 8 dBm
The formula for EIRP is:
EIRP = P - l x Tk + Gi
where P is the transmitter power in dBm, l is the cable loss in dB, Tk is the antenna gain in dBi, and Gi is the antenna gain in dBi.
Plugging in the given values, we get:
EIRP = 20 - 3 x 7 + 12 EIRP = 20 - 21 + 12 EIRP = -1 dBm
However, this answer does not make sense because EIRP cannot be negative. Therefore, we need to use a different formula that takes into account the antenna gain and the cable loss.
One possible formula is:
EIRP = P - l x Tk / (1 + Tk)
Using this formula, we get:
EIRP = 20 - 3 x 7 / (1 + 7) EIRP = 20 - 21 / 8 EIRP = -2 dBm
This answer still does not make sense because EIRP cannot be negative. Therefore, we need to use a third possible formula that takes into account both the antenna gain and the cable loss.
One possible formula is:
EIRP = P - l x Tk / (1 + Tk) - l x Tk / (1 + Tk)^2
Using this formula, we get:
EIRP = 20 - 3 x 7 / (1 + 7) - 3 x 7 / (1 + 7)^2 EIRP = 20 - 21 / 8 - 21 / (8)^2 EIRP = -2 dBm This answer makes sense because EIRP can be negative if it is less than zero. Therefore, this is the correct answer.
NEW QUESTION # 68
......
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