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. -9 dBm
B. 20 dBm
C. 40 dBm
D. 15 dBm
Correct Answer: B
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=PTLc+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=164+8=20 dBm
Therefore, the answer B is correct.
References: 1: Aruba Campus Access documents and learning resources 2: EIRP Calculator - Effective Isotropic Radiated Power
Question 32:
What is used to retrieve data stored in a Management Information Base (MIS)?
A. SNMPv3
B. DSCP
C. TLV
D. CDP
Correct Answer: A
Explanation: The correct answer is A. SNMPv3.
SNMPv3 is a protocol that is used to retrieve data stored in a Management Information Base (MIB), which is a database of managed objects in a network. SNMPv3 provides security and access control features that are not available in earlier
versions of SNMP. SNMPv3 can also use encryption to protect the data from unauthorized access or modification.
According to the Aruba Certified Professional ?Campus Access document1, one of the skills that this certification validates is:
Implement and Analyze the output from common network monitoring tools The document also mentions that the candidate should have a distinguished understanding of different protocols across vendors, which implies that they should be
familiar with SNMPv3 and how it can be used to access MIB data.
Question 33:
You need to ensure that voice traffic sent through an ArubaOS-CX switch arrives with minimal latency.
What is the best scheduling technology to use for this task?
A. Strict queuing
B. Rate limiting
C. QoS shaping
D. DWRR queuing
Correct Answer: A
Explanation: Strict queuing is the best scheduling technology to use for voice traffic on an AOS-CX switch. Scheduling is a mechanism that determines how packets are transmitted from different queues on an egress port. Strict queuing is a scheduling method that gives the highest priority queue absolute preference over all other queues, regardless of their size or utilization. Voice traffic should be assigned to the highest priority queue and scheduled with strict queuing to ensure minimal latency and jitter. The other options are incorrect because they are either not scheduling methods or not optimal for voice traffic. References: https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200- 6728/bk01ch02.html https://www.arubanetworks.com/techdocs/AOS- CX/10.04/HTML/5200-6728/bk01-ch03.html
Question 34:
You are helping an onsite network technician bring up an Aruba 9004 gateway with ZTP for a branch office The technician was to plug in any port for the ZTP process to start Thirty minutes after the gateway was plugged in new users started to complain they were no longer able to get to the internet. One user who reported the issue stated their IP address is 172.16 0.81 However, the branch office network is supposed to be on 10.231 81.0/24.
What should the technician do to alleviate the issue and get the ZTP process started correctly?
A. Turn off the DHCP scope on the gateway, and set DNS correctly on the gateway to reach Aruba Activate
B. Move the cable on the gateway from port G0/0V1 tc port G0 0.0
C. Move the cable on the gateway to G0/0/1. and add the device's MAC and Serial number in Central
D. Factory default and reboot the gateway to restart the process.
Correct Answer: B
Explanation: Aruba 9004 gateway supports ZTP on port G0/0/0 by default1. If the gateway is connected to a different port, such as G0/0/V1, it will not be able to communicate with Aruba Activate and Aruba Central, which are required for ZTP2. Moreover, port G0/0/V1 is configured as a DHCP server by default, which can cause IP address conflicts with the existing network3. Therefore, the technician should move the cable on the gateway to port G0/0/0, which will allow the gateway to obtain an IP address from the network DHCP server and start the ZTP process. The other options are not correct because they will not solve the issue or enable ZTP. For example, option D will not work because factory defaulting and rebooting the gateway will not change the port configuration or behavior3.
Question 35:
A customer is using stacked Aruba CX 6200 and CX 6300 switches for access and a VSX pair of Aruba CX 8325 as a collapsed core 802 1X is implemented for authentication. Due to the lack of cabling, some unmanaged switches are still in use Sometimes devices behind these switches cause network outages The switch should send a warning to the helpdesk when the problem occurs You have been asked to implement an effective solution to the problem.
What is the solution for this?
A. Configure spanning tree on the Aruba CX 8325 switches Set the trap-option
B. Configure loop protection on all edge ports of the Aruba CX 6200 and CX 6300 switches No trap option is needed
C. Configure loop protection on all edge ports of the Aruba CX 6200 and CX 6300 switches Set up the trap-option
D. Configure spanning tree on the Aruba CX 6200 and CX 6300 switches No trap option is needed
Correct Answer: C
Explanation: This is the correct solution to the problem of devices behind unmanaged switches causing network outages due to loops. Loop protection is a feature that allows an Aruba CX switch to detect and prevent loops by sending loop protection packets on each port, LAG, or VLAN on which loop protection is enabled. If a loop protection packet is received by the same switch that sent it, it indicates a loop exists and an action is taken based on the configuration. Loop protection should be configured on all edge ports of the Aruba CX 6200 and CX 6300 switches, which are the ports that connect to end devices or unmanaged switches. The trap-option should be set up to send a warning to the helpdesk when a loop is detected. The other options are incorrect because they either do not configure loop protection or do not set up the trap-option. References: https://www.arubanetworks.com/techdocs/AOS-CX/10.05/HTML/5200-7540/GUID- 99A8B276-0DA3-4458-AFD8-42BFEC29D4F5.html https://www.arubanetworks.com/techdocs/AOS-CX/10.05/HTML/5200-7540/GUID- D8613BDE-CD21-4B83-8561-17DB0311ED8F.html
Question 36:
With the Aruba CX switch configuration, what is the first-hop protocol feature that is used for VSX L3 gateway as per Aruba recommendation?
A. Active Gateway
B. Active-Active VRRP
C. SVI with vsx-sync
D. VRRP
Correct Answer: A
Explanation: Active Gateway is the first-hop protocol feature that is used for VSX L3 gateway as per Aruba recommendation. Active Gateway is a feature that allows both VSX peers to act as active gateways for different subnets, eliminating
the need for VRRP or other first-hop redundancy protocols. Active Gateway also provides fast failover and load balancing for L3 traffic across the VSX peers. The other options are incorrect because they are either not recommended or not
How do you allow a new VLAN 100 between VSX pair inter-switch-link 256 for port 1/45 and 2/45?
A. vlan trunk allowed 100 for ports 1/45 and 1/46
B. vlan trunk add 100 in LAG256
C. vlan trunk allowed 100 in LAG256
D. vlan trunk add 100 in MLAG256
Correct Answer: C
Explanation: To allow a new VLAN 100 between VSX pair inter-switch-link 256 for port 1/45 and 2/45, you need to use the command vlan trunk allowed 100 in LAG256. This will add VLAN 100 to the list of allowed VLANs on the trunk port LAG256, which is part of the inter-switch-link between VSX peers. The other options are incorrect because they either do not use the correct command or do not specify the correct port or VLAN. 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
Question 38:
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 auditors role did not have the appropriate level of access on the switch.
The user was not allowed to perform firmware upgrades and a privilege level of 15 was not assigned to their role. Which default management role should have been assigned for the user?
A. sysadmin
B. sysops
C. administrators
D. config
Correct Answer: B
Explanation: The correct answer is B. sysops.
The sysops user role is a predefined role that allows users to perform system operations on the switch, such as backup, restore, upgrade, or reboot. The sysops user role also has access to the PUT and POST methods for REST API, which
can be used to modify the switch configuration. The sysops user role has a privilege level of 15, which is the highest level of access on the switch1.
The other options are incorrect because:
A. sysadmin: The sysadmin user role is a predefined role that allows users to view and modify the switch configuration using the CLI or the Web UI. The sysadmin user role does not have access to the REST API methods, and cannot perform firmware upgrades1.
C. administrators: 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. D. config: The config user role is a predefined role that allows users to view and modify the switch configuration using the CLI or the Web UI. The config user role does not have access to the REST API methods, and cannot perform firmware upgrades1.
Question 39:
What is one advantage of using OCSP vs CRLs for certificate validation?
A. reduces latency between the time a certificate is revoked and validation reflects this status
B. less complex to implement
C. higher availability for certificate validation
D. supports longer certificate validity periods
Correct Answer: A
Explanation: OCSP is a protocol that allows clients to query the CA or a trusted responder for the status of a specific certificate. OCSP requests and responses are smaller and faster than CRLs, and they can provide real-time information about the revocation status of a certificate12. CRLs are lists of all revoked certificates that are downloaded from the CA. CRLs can present issues, as they can become outdated and have to be downloaded frequently13. Therefore, OCSP reduces latency between the time a certificate is revoked and validation reflects this status. References: 1 https://sectigostore.com/blog/ocsp-vs-crl- whats-the-difference/ 2 https://www.keyfactor.com/blog/what-is-a-certificate-revocation-listcrl-vs-ocsp/ 3 https://www.fortinet.com/resources/cyberglossary/ocsp
Question 40:
Your customer is having connectivity issues with a newly-deployed Microbranch group The access points in this group are online in Aruba Central, but no VPN tunnels are forming.
What is the most likely cause of this issue?
A. There is a time difference between the AP and the gateways The gateways should have NTP added
B. The SSL certificate on the gateway used to encrypt the connection has not been added to the APs trust list
C. There may be a firewall blocking GRE tunneling between the AP and the gateway
D. The gateway group is running in automatic cluster mode and should be in manual cluster mode
Correct Answer: C
Explanation: This is the most likely cause of the issue where the access points in a Microbranch group are online in Aruba Central, but no VPN tunnels are forming. A Microbranch group is a group that contains both APs and Gateways and allows them to form VPN tunnels for secure communication. The VPN tunnels use GRE (Generic Routing Encapsulation) as the encapsulation protocol and IPSec as the encryption protocol. If there is a firewall blocking GRE traffic between the AP and the gateway, the VPN tunnels cannot be established. The other options are incorrect because they either do not affect the VPN tunnel formation or do not apply to a Microbranch group. References: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos- solutions/gateways/microbranch.htm https://www.arubanetworks.com/assets/tg/TB_ArubaGateway.pdf
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