What does a slow amber-flashing Stack-LED indicate?
Correct Answer:
C
A slow amber-flashing Stack-LED indicates that stacking mode is selected on the switch. This means that the switch is ready to join a stack or form a new stack if no other switches are present. References:https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/ar ubaos-solutions/1-overview/stacking-leds.htm
Which statement is correct when comparing 5 GHz and 6 GHz channels with identical channel widths?
Correct Answer:
B
The correct statement when comparing 5 GHz and 6 GHz channels with identical channel widths is that 5 GHz channels travel different distances and provide different throughputs to clients compared to 6 GHz channels. This statement reflects the fact that higher frequency signals tend to have 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 . Higher attenuation means that higher frequency signals have shorter range and lower throughput than lower frequency signals. Some facts about this statement are:
✑ 5 GHz channels have lower frequency than 6 GHz channels, which means they
have lower attenuation than 6 GHz channels.
✑ Lower attenuation means that 5 GHz channels can travel longer distances and provide higher throughputs to clients than 6 GHz channels with identical channel widths.
✑ However, the difference in distance and throughput between 5 GHz and 6 GHz channels may not be significant in indoor environments where there are many obstacles and reflections that affect signal propagation.
✑ The advantage of using 6 GHz channels over 5 GHz channels is that they offer more spectrum availability, less interference, and more non-overlapping channels than 5 GHz channels.
The other options are not correct because:
✑ 5 GHz channels travel the same distances and provide different throughputs to clients compared to 6 GHz channels: This option is false because 5 GHz channels
do not travel the same distances as 6 GHz channels due to higher attenuation of higher frequency signals.
✑ 5 GHz channels travel the same distances and provide the same throughputs to
clients compared to 6 GHz channels: This option is false because 5 GHz channels do not travel the same distances or provide the same throughputs as 6 GHz channels due to higher attenuation of higher frequency signals.
✑ 5 GHz channels travel different distances and provide the same throughputs to
clients compared to 6 GHz channels: This option is false because 5 GHz channels do not provide the same throughputs as
6 GHz channels due to higher attenuation of higher frequency signals.
References: https://www.wi-fi.org/discover-wi-fi/wi-fi-certified-6e https://www.wi-fi.org/file/wi- fi-alliance-spectrum-needs-study https://www.cisco.com/c/en/us/support/docs/wireless- mobility/wireless-lan-wlan/82068-power-levels.html https://www.cisco.com/c/en/us/products/collateral/wireless/spectrum-expert-wi- fi/prod_white_paper0900aecd807395a9.html
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
Correct 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. References:https://www.arubanetworks.com/techdocs/AOS-CX_10_04/CLI/GUID- 8F0E7E8B-0F4B-4A3C-AE7F-0F1B5A7F9C5D.html
What does the status of "ALFOE" mean when checking LACP with "show lacp interfaces'"?
Correct Answer:
D
The status of ??ALFOE?? means that LACP Link Aggregation Control Protocol (LACP) is a network protocol that provides dynamic negotiation of link aggregation between two devices. LACP allows multiple physical links to be combined into a single logical link for increased bandwidth, redundancy, and load balancing. LACP is defined in IEEE 802.3ad standard. is working fine with no problems when checking LACP with ??show lacp interfaces??. The status of ??ALFOE?? is an acronym that stands for:
✑ A: Active - The interface is actively sending LACP packets to negotiate link
aggregation with the peer device.
✑ L: Link Up - The interface has physical connectivity with the peer device.
✑ F: Aggregatable - The interface can be aggregated with other interfaces into a single logical link.
✑ O: Synchronized - The interface has successfully negotiated link aggregation parameters with the peer device and can transmit or receive traffic on the logical link.
✑ E: Collecting/Distributing - The interface is collecting incoming traffic from the peer
device and distributing outgoing traffic to the peer device on the logical link. The other options are not correct because:
✑ The interface on the local switch is configured as static-LAG: This option is false
because static-LAG does not use LACP to negotiate link aggregation. Static-LAG requires manual configuration of link aggregation parameters on both devices and does not have any status indicators.
✑ LACP is not configured on the peer side: This option is false because if LACP is
not configured on the peer side, the status of the interface would be ??ALF–?? instead of ??ALFOE??. This means that the interface would not be synchronized or collecting/distributing with the peer device.
✑ LACP is in a synchronizing process: This option is false because if LACP is in a
synchronizing process, the status of the interface would be ??ALF-O?? instead of ??ALFOE??. This means that the interface would not be collecting/distributing with the peer device.
References: https://www.arubanetworks.com/techdocs/AOS- CX_10_08/NOSCG/Content/cx-noscg/lag/lag-overview.htm https://www.arubanetworks.com/techdocs/AOS-CX_10_08/NOSCG/Content/cx- noscg/lag/lag-lacp.htm https://www.arubanetworks.com/techdocs/AOS- CX_10_08/NOSCG/Content/cx-noscg/lag/lag-lacp-status.htm
DRAG DROP
Match the appropriate QoS concept with its definition.
Solution:
QoS Quality of Service (QoS) is a set of techniques that manage network resources and provide different levels of service to different types of traffic based on their requirements. QoS can improve network performance, reduce latency, increase throughput, and prevent congestion. concept and its definition. Here is my Answer:
QoS Concept:
✑ Best Effort Service
✑ Class of Service
✑ Differentiated Services
✑ WMM ====================== Definition:
d) A method where traffic is treated equally in a first-come, first-served manner a) A method for classifying network traffic at Layer 2 by marking 802.1Q VLAN Ethernet frames with one of eight service classes b) A method for classifying network traffic at Layer 3 by
marking packets with one of 64 different service classes c) A method for classifying network traffic using access categories based on the IEEE 802.11e QoS standard
Short But Comprehensive Explanation of Correct Answer Only: The correct match between QoS concept and its definition is as follows:
✑ Best Effort Service: This is a method where traffic is treated equally in a first-come,
first-served manner without any prioritization or differentiation. This is the default service level for most networks and applications that do not have specific QoS requirements or guarantees. Best Effort Service does not provide any assurance of bandwidth, delay, jitter, or packet loss.
✑ Class of Service: This is a method for classifying network traffic at Layer 2 by
marking 802.1Q VLAN Ethernet frames with one of eight service classes (0 to 7). These service classes are also known as IEEE 802.1p priority values or PCP Priority Code Point (PCP) is a 3-bit field in the 802.1Q VLAN tag that indicates the priority level of an Ethernet frame . Class of Service allows network devices to identify and handle different types of traffic based on their priority levels. Class of Service is typically used in LAN Local Area Network (LAN) is a network that connects devices within a limited geographic area, such as a home, office, or building environments where Layer 2 switching is predominant.
✑ Differentiated Services: This is a method for classifying network traffic at Layer 3
by marking packets with one of 64 different service classes (0 to 63). These service classes are also known as DiffServ Code Points (DSCP) DiffServ Code Point (DSCP) is a 6-bit field in the IP header that indicates the service class of a packet . Differentiated Services allows network devices to identify and handle different types of traffic based on their service classes. Differentiated Services is typically used in WAN Wide Area Network (WAN) is a network that connects devices across a large geographic area, such as a country or continent environments where Layer 3 routing is predominant.
✑ WMM: This is a method for classifying network traffic using access categories
based on the IEEE 802.11e QoS standard. WMM stands for Wi-Fi Multimedia and it is a certification program developed by the Wi-Fi Alliance to enhance QoS for wireless networks. WMM defines four access categories (AC): Voice, Video, Best Effort, and Background. These access categories correspond to different priority levels and contention parameters for wireless traffic. WMM allows wireless devices to identify and handle different types of traffic based on their access categories.
References: https://en.wikipedia.org/wiki/Quality_of_service https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_dfsrv/configuration/xe-16/qos-dfsrv- xe-16-book/qos-dfsrv-overview.htmlhttps://www.cisco.com/c/en/us/support/docs/quality-of- service-qos/qos-packet-marking/10103-dscpvalues.html https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/81831-qos- wlan.html https://www.wi-fi.org/discover-wi-fi/wi-fi-certified-wmm
Does this meet the goal?
Correct Answer:
A
