無料HP HPE6-A85日本語プレミアム試験エンジンPDFをダウンロード 更新された62問があります
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質問 # 10
ネットワーク技術者が 802 1X 経由で従業員 SSID に正常に接続しました。接続を成功させるにはどの RADIUS メッセージを探す必要がありますか?
- A. 成功
- B. 許可されています
- C. アクセス許可
- D. 認証済み
正解：C
解説：
Explanation
The RADIUS message that you should look for to ensure a successful connection via 802.1X is Access-Accept. This message indicates that the RADIUS server has authenticated and authorized the supplicant (the device that wants to access thenetwork) and has granted it access to the network resources. The Access-Accept message may also contain additional attributes such as VLAN ID, session timeout, or filter ID that specify how the authenticator (the device that controls access to the network, such as a switch) should treat the supplicant's traffic.
The other options are not RADIUS messages because:
Authorized: This is not a RADIUS message, but a state that indicates that a port on an authenticator is allowed to pass traffic from a supplicant after successful authentication and authorization.
Success: This is not a RADIUS message, but a status that indicates that an EAP Extensible Authentication Protocol (EAP) is an authentication framework that provides support for multiple authentication methods, such as passwords, certificates, tokens, or biometrics. EAP is used in wireless networks and point-to-point connections to provide secure authentication between a supplicant (a device that wants to access the network) and an authentication server (a device that verifies the credentials of the supplicant). exchange has completed successfully between a supplicant and an authentication server.
Authenticated: This is not a RADIUS message, but a state that indicates that a port on an authenticator has received an EAP-Success message from an authentication server after successful authentication of a supplicant.
References: https://en.wikipedia.org/wiki/RADIUS#Access-Accept
https://www.cisco.com/c/en/us/support/docs/security-vpn/remote-authentication-dial-user-service-radius/13838-1
https://en.wikipedia.org/wiki/IEEE_802.1X#Port-based_network_access_control
https://en.wikipedia.org/wiki/Extensible_Authentication_Protocol#EAP_exchange
質問 # 11
Aruba CX スイッチで OSPF ダイナミック ルーティング プロトコルを使用する場合、ルートを交換するには隣接デバイスで何が一致する必要がありますか?
- A. ECMP方式
- B. こんにちはタイマー
- C. BDR 構成
- D. DR構成
正解：B
解説：
Explanation
OSPF Open Shortest Path First. OSPF is a link-state routing protocol that uses a hierarchical structure to create a routing topology for IP networks. OSPF routers exchange routing information with their neighbors using Hello packets, which are sent periodically on each interface. To establish an adjacency Adjacency is a relationship formed between selected neighboring routers for the purpose of exchanging routing information., OSPF routers must agree on several parameters, including Hello timers, which specify how often Hello packets are sent on an interface. If the Hello timers do not match between neighboring routers, they will not form an adjacency and will not exchange routes.
References:https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/osfp/o
質問 # 12
ネットワーク技術者は、Aruba Central を使用してネットワークの問題をトラブルシューティングしています。トラブルシューティング プロセスを開始するときに、問題を表示して確認するにはどのダッシュボードを使用できますか?
- A. レポート ダッシュボード
- B. アラートとイベントのダッシュボード
- C. ツールダッシュボード
- D. 監査証跡ダッシュボード
正解：B
解説：
Explanation
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 severities . You can also view the alerts and events in the List view and Summary view2. References:
https://www.arubanetworks.com/techdocs/central/latest/content/nms/alerts/configuring-alerts.htm 2
https://www.arubanetworks.com/techdocs/central/latest/content/nms/alerts/viewing-alerts.htm
質問 # 13
AP からの信号が物体を通過する際に吸収されて弱まるとどうなりますか?
- A. AP はボンディングされたチャネルを使用して、クライアントへの遅延を短縮します。
- B. 信号対雑音比 (SNR) が増加します。
- C. Aruba Central はクライアントを隣接する AP に動的に移動します
- D. 信号対雑音比 (SNR) が低下します。
正解：D
解説：
Explanation
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 recover1. When the signal from an AP Access Point. AP is a device that allows wireless devices to connect to a wired network using Wi-Fi, or related standards. weakens by being absorbed as it moves through an object, such as a wall or a furniture, the signal power decreases. This reduces the SNR and affects the quality of the wireless connection. The noise power may also increase due to interference from other sources, such as other APs or devices operating in the same frequency band2. Therefore, the correct answer is that SNR decreases when the signal from an AP weakens by being absorbed as it moves through an object. References: 1
https://en.wikipedia.org/wiki/Signal-to-noise_ratio 2
https://documentation.meraki.com/MR/Wi-Fi_Basics_and_Best_Practices/Signal-to-Noise_Ratio_%28SNR%29
質問 # 14
Aruba モビリティ マスター アーキテクチャを使用する場合、ネットワーク管理者はどの機能を使用して RF 計画および最適化サービスを一元化できますか?
- A. クライアント ウェーブ
- B. エアマッチ
- C. エアウェイブ
- D. クライアントマッチ
正解：B
解説：
Explanation
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. References:https://www.arubanetworks.com/assets/ds/DS_AirMatch.pdf
質問 # 15
適切な QoS 概念とその定義を一致させます。
正解：
解説：
Explanation
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-dfsr
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
質問 # 16
複数の 20MHz 幅の 802.11 チャネルを結合するのはいつですか?
- A. 高利得全方向性アンテナを使用する場合
- B. 高可用性 AP グループをプロビジョニングするため
- C. 信号対雑音比 (SNR) を下げるには
- D. クライアントと AP 間のスループットを向上させるため
正解：D
解説：
Explanation
Bonding multiple 20MHz wide 802.11 channels is a technique to create a wider bandwidth channel that supports higher data rate transmissions. It can increase the throughput between the client and AP by using more spectrum resources and reducing interference. References:https://ieeexplore.ieee.org/document/9288995
質問 # 17
「show lacp Interfaces」で LACP を確認するときの「ALFOE」のステータスは何を意味しますか?
- A. LACP は同期プロセス中です
- B. ローカル スイッチ上のインターフェイスはstatic LAG として構成されています
- C. LACP は問題なく正常に動作しています。
- D. LACP がピア側で設定されていません
正解：C
解説：
Explanation
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.
D: 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
質問 # 18
アドミニストレーティブ ディスタンスの目的の説明
- A. 外部 BGP 経由でチーム化されたルートは、OSPF 経由で学習されたルートよりもアドミニストレーティブ ディスタンスが高くなります。
- B. アドミニストレーティブ ディスタンスが高いほど優先されます。
- C. アドミニストレーティブ ディスタンスは、ルート エントリの信頼性評価として使用されます。
- D. スタティック ルートのアドミニストレーティブ ディスタンスは 10 です
正解：C
質問 # 19
ゲートウェイ 172.16.1.1 経由でクラス C ネットワーク 10.2.10.0 にスタティック ルートを追加するための正しいコマンドは何ですか?
- A. ip ルートstatic 10.2 10.0.255.255.255.0 172.16.1.1
- B. ip ルート 10.2.10.0/24.172.16.11
- C. ip-route 10.2.10.0/24 172.16.1.1
- D. ip ルート 10.2.10.0.255.255.255.0 172.16.1.1 説明アルバ
正解：C
解説：
Explanation
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.
References:https://www.arubanetworks.com/techdocs/AOS-CX_10_04/NOSCG/Content/cx-noscg/ip-routing/sta
質問 # 20
データの暗号化および/または復号化に WPA キー階層のどの部分が使用されるか
- A. キー確認キー（KCK）
- B. ペアワイズ マスター キー (PMK)
- C. ペアワイズ一時キー (PTK)
- D. 1回使用される数値(ノンス)
正解：C
解説：
Explanation
The part of WPA Key Hierarchy that is used to encrypt and/or decrypt data is Pairwise Temporal Key (PTK).
PTK is a key that is derived from PMK Pairwise Master Key (PMK) is a key that is derived from PSK Pre-shared Key (PSK) is a key that is shared between two parties before communication begins , ANonce Authenticator Nonce (ANonce) is a random number generated by an authenticator (a device that controls access to network resources, such as an AP) , SNonce Supplicant Nonce (SNonce) is a randomnumber generated by supplicant (a device that wants to access network resources, such as an STA) , AA Authenticator Address (AA) is MAC address of authenticator , SA Supplicant Address (SA) is MAC address of supplicant using Pseudo-Random Function (PRF). PTK consists of four subkeys:
KCK Key Confirmation Key (KCK) is used for message integrity check
KEK Key Encryption Key (KEK) is used for encryption key distribution
TK Temporal Key (TK) is used for data encryption
MIC Message Integrity Code (MIC) key
The subkey that is specifically used for data encryption is TK Temporal Key (TK). TK is also known as Pairwise Transient Key (PTK). TK changes periodically during communication based on time or number of packets transmitted.
The other options are not part of WPA Key Hierarchy because:
PMK: PMK is not part of WPA Key Hierarchy, but rather an input for deriving PTK.
KCK: KCK is part of WPA Key Hierarchy, but it is not used for data encryption, but rather for message integrity check.
Nonce: Nonce is not part of WPA Key Hierarchy, but rather an input for deriving PTK.
References: https://en.wikipedia.org/wiki/Wi-Fi_Protected_Access#WPA_key_hierarchy_and_management
https://www.cwnp.com/wp-content/uploads/pdf/WPA2.pdf
質問 # 21
UXl の 2 つの利点は何ですか? (2つ選択してください。)
- A. UXl はインターネット接続なしで使用できます
- B. UXl は、離れた場所で最適な WiFi チャネルを計算するのに役立ちます。
- C. UX1 はクライアント/ユーザーのように動作します。
- D. UX1 は、指定された場所にあるすべての AP の Wi-Fi カバレッジを測定します。
- E. UX1 は、HTTP VOIP や Office 365 などのさまざまなアプリケーションをチェックできます。
正解：C、E
解説：
Explanation
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.
References:https://www.arubanetworks.com/products/networking/user-experience-insight/
質問 # 22
TCP 3ウェイ ハンドシェイク シーケンスの正しい順序は何ですか?
正解：
解説：
Explanation
TCP 3-Way Handshake sequence is:
Step 1: The initiating host sends a packet with no data to the target host with a SEQ=1 and sets the SYN flag to 1.
Step 2: The target host responds with a packet with ACK=2, SEQ=8, and the SYN and ACK flags set to
1.
Step 3: The initiating host sends a packet with SEQ=2, ACK=9, and the ACK flag set to 1.
Step 4: A normal-controlled connection is established.
References: https://en.wikipedia.org/wiki/Transmission_Control_Protocol
https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/13788-3.html
質問 # 23
あなたは顧客との会議に出席しており、ネットワーク冗長機能マルチプル スパニング ツリー (MSTP) について説明するよう求められています。この機能についての正しい説明は何ですか?
- A. 現在の MSTP ルート優先順位としてデフォルトで設定されている MSTP 構成 ID リビジョン
- B. スイッチのシリアル番号を使用したデフォルトの MSTP 構成 ID 名
- C. デフォルトではスイッチのシリアル番号としての MSTP 構成 ID リビジョン
- D. スイッチ IMC アドレスを使用したデフォルトの MSTP 構成 ID 名
正解：D
解説：
Explanation
MSTP Multiple Spanning Tree Protocol. MSTP is an IEEE standard protocol for preventing loops in a network with multiple VLANs. MSTP allows multiple VLANs to be mapped to a reduced number of spanning-tree instances. configuration ID consists of two parameters: name and revision. The name is a
32-byte ASCII string that identifies the MSTP region, which is a group of switches that share the same configuration ID and VLAN-to-instance mapping. The revision is a 16-bit number that indicates the version of the configuration ID. By default, the MSTP configuration ID name is set to the switch IMC address, which is a unique identifier derived from the MAC address Media Access Control address. MAC address is a unique identifier assigned to a network interface controller (NIC) for use as a network address in communications within a network segment. of the switch.
References:https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/mstp/
質問 # 24
Aruba Central を使用する場合、ネットワークの健全性の問題を解決するための推奨手順を特定し、サポート担当者と詳細情報を共有できるものは何ですか?
- A. アラートとイベント
- B. 概要ダッシュボード
- C. 監査証跡
- D. OAlOps
正解：D
解説：
Explanation
OAlOps is a feature of Aruba Central that uses artificial intelligence and machine learning to identify recommended steps to resolve network health issues and allows you to share detailed information with support personnel. OAlOps provides insights into network performance, root cause analysis, anomaly detection, proactive alerts, and automated remediation actions.OAlOps also integrates with Aruba User Experience Insight (UXI) sensors to measure and improve user experience across wired and wireless networks.
References:https://www.arubanetworks.com/assets/ds/DS_ArubaCentral.pdf
質問 # 25
同じチャネル幅を持つ 5 GHz チャネルと 6 GHz チャネルを比較した場合、正しいのはどれですか?
- A. 5 GHz チャネルは、6 GHz チャネルと比較して同じ距離を移動し、同じスループットをクライアントに提供します。
- B. 5 GHz チャネルは、6 GHz チャネルと比較して異なる距離を移動し、クライアントに同じスループットを提供します。
- C. 5 GHz チャネルは同じ距離を移動し、6 GHz チャネルと比較して異なるスループットをクライアントに提供します。
- D. 5 GHz チャネルは、6 GHz チャネルと比較して、異なる距離を移動し、異なるスループットをクライアントに提供します。
正解：D
解説：
Explanation
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_paper0900aecd80
質問 # 26
6 GHz 帯域の主な特徴は何ですか?
- A. 6 GHz 帯域は既存の帯域と完全に下位互換性があります。
- B. 6 GHz WLAN では、物体による RF 信号の吸収が少なくなります。
- C. 低電力デバイスは屋内および屋外での使用が許可されています。
- D. 北米では、6 GHz 帯域は、北米の 40 MHz チャネルよりも多くの 80 MHz チャネルを提供します。
5GHz帯。
正解：D
解説：
Explanation
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 6Estandard 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.
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/products/collateral/wireless/spectrum-expert-wi-fi/prod_white_paper0900aecd80
https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/82068-power-levels.html
https://www.wi-fi.org/file/wi-fi-alliance-unlicensed-spectrum-in-the-us
質問 # 27 
指定されたトポロジに基づいて、スイッチ 1 のポート 1/1/24 で LLDP メッセージを受信できるようにするための Aruba スイッチの要件は何ですか。Router 1 で LLDP が有効になっている場合?
- A. グローバル設定 lldp 有効化
- B. LLDP はデフォルトで有効になっています
- C. int 1/1/24、cdp なし
- D. int 1/1/24、lldp 受信
正解：D
解説：
Explanation
LLDP Link Layer Discovery Protocol. LLDP is a vendor-neutral link layer protocol used by network devices for advertising their identity, capabilities, and neighbors on a local area network. is enabled by default on Aruba switches, but it can be disabled on a per-port basis using the no lldp command. To enable LLDP messages to be received by Switch 1 port 1/1/24, you need to enter the interface configuration mode for that port and use the lldp receive command.
References:https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/lldp/l
質問 # 28
スイッチ EDGE1 および CORE1 にいくつかの show コマンドを入力して、問題のトラブルシューティングのための情報を収集しようとします。 show コマンドの出力イメージを使用して、EDGE1 アップリンクがダウンしている理由を特定します。
- A. LACP がコア アップリンクに設定されていません
- B. スパニングツリー ブロック状態により、コア アップリンクがエッジに接続できなくなります。
- C. コアが間違った物理インターレースに接続されています
- D. 物理インターフェイスは正しい LAG のメンバーではありません。
正解：A
解説：
Explanation
LACP is a protocol that allows multiple physical links to be aggregated into a single logical link for increased bandwidth and redundancy. LACP must be configured on both ends of the link for it to work properly. In this case, EDGE1 has LACP configured on its uplink port-channel 1, but CORE1 does not have LACP configured on its corresponding port-channel 1. This causes a mismatch and prevents the link from coming up.
References:https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-ove
質問 # 29
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