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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Describe Wireless Networking Fundamentals | 20% | - Wireless LAN concepts
|
| Topic 2: Describe Network Security Fundamentals | 15% | - Basic security concepts
|
| Topic 3: Describe Aruba Management Solutions | 15% | - Network management platforms
|
| Topic 4: Troubleshooting and Maintenance | 10% | - Basic troubleshooting methodology
|
| Topic 5: Describe Network Fundamentals | 15% | - OSI model and TCP/IP fundamentals
|
| Topic 6: Describe Aruba Switching Solutions | 25% | - Aruba CX switching features
|
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問題 #65
A network technician is verifying that a customer successfully connected to the guest network after completing the captive portal. The network technician looks at the access tracker in ClearPass. Which role should be seen when looking at the OUTPUT tab for the customer's session?
答案：D
解題說明：
In the access tracker of ClearPass, after a customer successfully connects to a guest network through a captive portal, the OUTPUT tab should show a role indicating that the user is authenticated, such as "Guest authenticated." This role confirms that the user has passed the authentication process and has been granted access.
問題 #66
A network technician has successfully connected to the employee SSID via 802 1X Which RADIUS message should you look for to ensure a successful connection?
答案：D
解題說明：
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 the network) 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.
問題 #67
Which authentication does Aruba's Captive Portal use?
答案：C
解題說明：
Aruba's Captive Portal uses Layer 3 authentication, which means that it intercepts the client's HTTP requests and redirects them to a web page where the client can enter their credentials. The credentials are then verified by a RADIUS server or a local database before granting network access.
References: https://www.arubanetworks.com/techdocs/Instant_86_WebHelp/Content/instant-ug/captive- portal/ca
問題 #68
The noise floor measures .000000001 milliwatts, and the receiver's signal strength is -65dBm.
What is the Signal to Noise Ratio?
答案：A
解題說明：
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.
問題 #69
What happens when the signal from an AP weakens by being absorbed as it moves through an object?
答案：D
解題說明：
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.
問題 #70
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