The signal to noise ratio (SNR) is a measure that compares the level of a desired signal to the level of

background noise. SNR is defined as the ratio of signal power to the noise power, often expressed in

decibels (dB). A high SNR means that the signal is clear and easy to detect or interpret, while a low

SNR means that the signal is corrupted or obscured by noise and may be difficult to distinguish or

recover3. To calculate the SNR in dB, we can use the following formula:

SNR (dB) = Signal power (dBm) - Noise power (dBm)

In this question, we are given that the noise floor measures -90 dBm (0.000000001 milliwatts) and

the receiver’s signal strength is -65 dBm (0.000316 milliwatts). Therefore, we can plug these values

into the formula and get:

SNR (dB) = -65 dBm - (-90 dBm) SNR (dB) = -65 dBm + 90 dBm SNR (dB) = 25 dBm

Therefore, the correct answer is that the SNR is 25 dBm.

Reference: 3 https://en.wikipedia.org/wiki/Signal-to-noise_ratio

In a Virtual Switching Extension (VSX) stack, the Virtual IP (VIP) provides a single default gateway IP

address for clients connected to the access switch. This VIP is a floating IP that is active on the

primary VSX switch. In the event of a failure of the primary switch, the VIP will failover to the

secondary switch, ensuring that client traffic can continue to be routed without disruption.

The main characteristic of the 6 GHz band that is true among the given options is that in North

America, the 6 GHz band offers more 80 MHz channels than there are 40 MHz channels in the 5 GHz

band. This characteristic provides more spectrum availability, less interference, and higher

throughput for wireless devices that support Wi-Fi 6E Wi-Fi Enhanced (Wi-Fi 6E) is an extension of

Wi-Fi 6 (802.11ax) standard that operates in the newly available unlicensed frequency spectrum

around 6 GHz in addition to existing bands below it. Some facts about this characteristic are:

In North America, there are up to seven non-overlapping channels available in each of three channel

widths (20 MHz, 40 MHz, and 80 MHz) in the entire unlicensed portion of the new spectrum (5925–

7125 MHz). This means there are up to 21 non-overlapping channels available for Wi-Fi devices in

total.

In comparison, in North America, there are only nine non-overlapping channels available in each of

two channel widths (20 MHz and 40 MHz) in the entire unlicensed portion of the existing spectrum

below it (2400–2483 MHz and 5150–5825 MHz). This means there are only up to nine non-

overlapping channels available for Wi-Fi devices in total.

Therefore, in North America, there are more than twice as many non-overlapping channels available

in each channel width in the new spectrum than in the existing spectrum below it.

Specifically, there are more than twice as many non-overlapping channels available at 80 MHz width

(seven) than at 40 MHz width (three) in the existing spectrum below it.

The other options are not true because:

Less RF signal is absorbed by objects in a 6 GHz WLAN: This option is false because higher frequency

signals tend to be more absorbed by objects than lower frequency signals due to higher attenuation

Attenuation is a general term that refers to any reduction in signal strength during transmission over

distance or through an object or medium . Therefore, RF signals in a 6 GHz WLAN would be more

absorbed by objects than RF signals in a lower frequency WLAN.

The 6 GHz band is fully backward compatible with existing bands: This option is false because Wi-Fi

devices need to support Wi-Fi 6E standard to operate in the new spectrum around 6 GHz . Existing

Wi-Fi devices that do not support Wi-Fi 6E standard cannot use this spectrum and can only operate in

existing bands below it.

Low Power Devices are allowed for indoor and outdoor usage: This option is false because Low

Power Indoor Devices (LPI) are only allowed for indoor usage under certain power limits and

registration requirements . Outdoor usage of LPI devices is prohibited by regulatory authorities such

as FCC Federal Communications Commission (FCC) is an independent agency of United States

government that regulates communications by radio, television, wire, satellite, and cable across

United States . However, outdoor usage of Very Low Power Devices (VLP) may be allowed under

certain power limits and without registration requirements.

Reference: https://www.wi-fi.org/discover-wi-fi/wi-fi-certified-6e https://www.wi-fi.org/file/wi-fialliance-spectrum-needs-study

https://www.cisco.com/c/en/us/products/collateral/wireless/spectrum-expert-wifi/prod_white_paper0900aecd807395a9.html

https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/82068-powerlevels.html https://www.wi-fi.org/file/wi-fi-alliance-unlicensed-spectrum-in-the-us

The correct command to add a static route to a class-c-network 10.2.10.0 via a gateway of 172.16.1.1

is ip-route 10.2.10.0/24 172.16.1.1 . This command specifies the destination network address

(10.2.10.0) and prefix length (/24) and the next-hop address (172.16.1 .1) for reaching that network

from the switch. The other commands are either incorrect syntax or incorrect parameters for adding

a static route. Reference: https://www.arubanetworks.com/techdocs/AOSCX_10_04/NOSCG/Content/cx-noscg/ip-routing/static-routes.htm

To add a static route in network devices, including Aruba switches, the correct command format

generally includes the destination network, subnet mask (or CIDR notation for the mask), and the

next-hop IP address. The command "ip route 10.2.10.0/24 172.16.1.1" correctly specifies the

destination network "10.2.10.0" with a class C subnet mask indicated by "/24", and "172.16.1.1" as

the next-hop IP address. This command is succinct and follows the standard syntax for adding a static

route in many network operating systems, including ArubaOS-CX. The other options either have

incorrect syntax or include additional unnecessary parameters that are not typically part of the

standard command to add a static route.

AirMatch is a feature that provides centralized RF planning and optimization service for Aruba

wireless networks. It uses cloud-based algorithms and machine learning to optimize the RF

performance and user experience. Reference:

https://www.arubanetworks.com/assets/ds/DS_AirMatch.pdf

In Aruba networks, the recommended Virtual Switching Framework (VSF) topologies include the

daisy chain plus Multi-Active Detection (MAD) and the ring topology. The daisy chain topology with

MAD provides a straightforward and effective way to connect multiple switches in a series while

ensuring there is a mechanism in place (MAD) to detect and handle situations where more than one

switch in the VSF might become active simultaneously. The ring topology offers redundancy by

creating a looped connection pattern among the VSF members, enhancing network resilience and

reliability.

The command that is used to set a default route to 10.4.5.1 on an Aruba CX switch when in-band

management using an SVI is being used is ip route 0.0 0 0/0 10.4.5.1 . This command specifies the

destination network address (0.0 0 0) and prefix length (/0) and the next-hop address (10.4.5.1) for

reaching any network that is not directly connected to the switch. The default route applies to the

default VRF Virtual Routing and Forwarding. VRF is a technology that allows multiple instances of a

routing table to co-exist within the same router at the same time. VRFs are typically used to segment

network traffic for security, privacy, or administrative purposes. , which is used for in-band

management traffic that goes through an SVI Switch Virtual Interface. SVI is a virtual interface on a

switch that allows the switch to route packets between different VLANs on the same switch or

different switches that are connected by a trunk link. An SVI is associated with a VLAN and has an IP

address and subnet mask assigned to it12.

Reference: 1 https://www.arubanetworks.com/techdocs/AOS-CX/10_08/HTML/ip_route_4100i6000-6100-6200/Content/Chp_StatRoute/def-

rou.htm 2 https://www.arubanetworks.com/techdocs/AOS-CX/10_08/HTML/ip_route_4100i-60006100-6200/Content/Chp_VRF/vrf-overview.htm

This configuration script will achieve the task as it follows the guidelines given by the Senior

Engineer. It creates VLAN 20 with name Mgmt, adds L3 SVI on VLAN 20 with IP address 10.1.1.10/24,

creates LAG 1 with LACP mode active for the uplink, uses VLAN 20 as the native VLAN on the LAG,

and ensures that the interfaces are all ON. Reference:

https://www.arubanetworks.com/techdocs/AOS-CX/10.04/HTML/5200-6790/GUID-8F0E7E8B-0F4B4A3C-AE7F-0F1B5A7F9C5D.html

Edge1# conf t

vlan 20

name Mgmt

interface vlan 20

ip address 10.1.1.10/24

no shut

interface lag 1

no shut

vlan trunk native 20

vlan trunk allowed all

lacp mode active

interface 1/1/51

no shut

lag 1

interface 1/1/52

no shut

lag 1

exit

This script correctly creates VLAN 20 with the name 'Mgmt', adds an L3 SVI for management using

the specified IP address, and configures LACP for link aggregation (LAG 1) using the active mode. It

also sets VLAN 20 as the native VLAN on the LAG and ensures all interfaces are enabled ('no shut' is

the command to bring up the interface if it has been administratively shut down).

The Alerts and Events dashboard displays all types of alerts and events generated for events

pertaining to device provisioning, configuration, and user management. You can use the Config icon

to configure alerts and notifications for different alert categories and severities1. You can also view

the alerts and events in the List view and Summary view2.

Reference: 1 https://www.arubanetworks.com/techdocs/central/latest/content/nms/alerts/configuri

ng-

alerts.htm 2 https://www.arubanetworks.com/techdocs/central/latest/content/nms/alerts/viewingalerts.htm

A UXI (User Experience Insight) is a device that simulates user behavior and tests network

performance from the user perspective. It can check different applications, such as HTTP, VOIP, or

Office 365, and measure metrics such as latency, jitter, packet loss, and throughput. Reference:

https://www.arubanetworks.com/products/networking/user-experience-insight/

A User Experience Insight (UXI) sensor, such as those used in Aruba networks, is designed to mimic

client behavior and test the performance of various network services and applications from the

user's perspective. It can simulate user activities and measure the quality of experience for different

applications, including HTTP, VOIP, and cloud services like Office 365, providing valuable insights into

network performance and user experience.

WPA3-Personal enhances the security of wireless networks by using Simultaneous Authentication of

Equals (SAE), which is a more secure replacement for the Pre-Shared Key (PSK) method used in

WPA2. SAE strengthens the initial key exchange, providing better protection against offline dictionary

attacks and ensuring that each session has a unique Pairwise Master Key (PMK), derived from the

interaction between the client and the access point, including session-specific information like MAC

addresses and nonces.