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  3. HPE6-A85 Exam
  4. HP.HPE6-A85.v2025-02-08.q90 Dumps
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Question 66

Which part of the WPA Key Hierarchy is used to encrypt and/or decrypt data''

Correct Answer: A
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
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Question 67

An AP signal strength of .0000001 milliwatts equals how many dBm?

Correct Answer: D
An AP signal strength of .0000001 milliwatts is equivalent to -80 dBm. The dBm scale is logarithmic, with every 10 dBm representing a tenfold increase or decrease in power. A signal strength of 1 milliwatt (mW) is 0 dBm, so a signal strength of .0000001 mW is 80 decibels less than 1 mW, which is -80 dBm.
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Question 68

You are in a meeting with a customer where you are asked to explain the network redundancy feature Multiple Spanning Tree (MSTP). What is the correct statement for this feature?

Correct Answer: B
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/
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Question 69

Based on the given topology, what is the requirement on an Aruba switch to enable LLDP messages to be received by Switch 1 port 1/1/24.

When Router 1 is enabled with LLDP?

Correct Answer: A
For an Aruba switch to receive LLDP messages on a specific port, LLDP must be enabled on that port.
The default configuration for Aruba switches typically has LLDP enabled on all ports, so in most cases, no additional configuration is required.
This means that if Router 1 is sending LLDP messages, Switch 1 port 1/1/24 should receive them without additional configuration, as long as LLDP has not been disabled on that port. If LLDP were disabled on the switch or on the specific port, you would then need to enable it, which could be similar to option C (with correct Aruba OS syntax), as option B suggests a global configuration command which is not typically how LLDP is enabled on Aruba switches. Option D is related to Cisco Discovery Protocol (CDP), which is not relevant to LLDP operation.
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Question 70

Match the Open Systems Interconnection (OSI) layer with its function.

Correct Answer:
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