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HP Aruba Certified Network Security Associate Exam HPE6-A78 Prüfungsfragen mit Lösungen (Q153-Q158):

153. Frage
Refer to the exhibit.

This company has ArubaOS-Switches. The exhibit shows one access layer switch, Swllcn-2. as an example, but the campus actually has more switches. The company wants to slop any internal users from exploiting ARP What Is the proper way to configure the switches to meet these requirements?

A. On Swltch-2, enable DHCP snooping globally and on VLAN 201 before enabling ARP protection
B. On Switch-1, enable ARP protection globally, and enable ARP protection on ail VLANs.
C. On Switch-2, make ports connected to employee devices trusted ports for ARP protection
D. On Swltch-2, configure static PP-to-MAC bindings for all end-user devices on the network

Antwort: A

Begründung:
To prevent users from exploiting Address Resolution Protocol (ARP) on a network with ArubaOS-Switches, the correct approach would be to enable DHCP snooping globally and on VLAN 201 before enabling ARP protection, as stated in option C. DHCP snooping acts as a foundation by tracking and securing the association of IP addresses to MAC addresses. This allows ARP protection to function effectively by ensuring that only valid ARP requests and responses are processed, thus preventing ARP spoofing attacks.
Trusting ports that connect to employee devices directly could lead to bypassing ARP protection if those devices are compromised.
The company's goal is to prevent internal users from exploiting ARP within their ArubaOS-Switch network.
Let's break down the options:
Option A (Incorrect): Enabling ARP protection globally on Switch-1 and all VLANs is not the best approach. ARP protection should be selectively applied where needed, not globally. It's also not clear why Switch-1 is mentioned when the exhibit focuses on Switch-2.
Option B (Incorrect): Making ports connected to employee devices trusted for ARP protection is a good practice, but it's not sufficient by itself. Trusted ports allow ARP traffic, but we need an additional layer of security.
Option C (Correct): This is the recommended approach. Here's why:
DHCP Snooping: First, enable DHCP snooping globally. DHCP snooping helps validate DHCP messages and builds an IP-MAC binding table. This table is crucial for ARP protection to function effectively.
VLAN 201: Enable DHCP snooping specifically on VLAN 201 (as shown in the exhibit). This ensures that DHCP messages within this VLAN are validated.
ARP Protection: Once DHCP snooping is in place, enable ARP protection. ARP requests/replies from untrusted ports with invalid IP-to-MAC bindings will be dropped. This prevents internal users from exploiting ARP for attacks like man-in-the-middle.
Option D (Incorrect): While static ARP bindings can enhance security, they are cumbersome to manage and don't dynamically adapt to changes in the network.
References:
ArubaOS-Switch Management and Configuration Guide for WB_16_10 - Chapter 15: IP Routing Features Aruba Security Guide

154. Frage
What is one way that Control Plane Security (CPSec) enhances security for the network?

A. It protects wireless clients' traffic, tunneled between APs and Mobility Controllers, from eavesdropping.
B. It prevents Denial of Service (DoS) attacks against Mobility Controllers' (MCs') control plane.
C. It prevents access from unauthorized IP addresses to critical services, such as SSH, on Mobility Controllers (MCs).
D. It protects management traffic between APs and Mobility Controllers (MCs) from eavesdropping.

Antwort: D

Begründung:
Control Plane Security (CPSec) is a feature in HPE Aruba Networking's AOS-8 architecture that secures the communication between Access Points (APs) and Mobility Controllers (MCs). The control plane includes management traffic, such as AP registration, configuration updates, and heartbeat messages, which are critical for the operation of the wireless network.
Option A, "It protects management traffic between APs and Mobility Controllers (MCs) from eavesdropping," is correct. CPSec uses certificate-based authentication and encryption (IPSec tunnels) to secure the control plane communication between APs and MCs. This ensures that management traffic, which includes sensitive information like configuration data and AP status, is encrypted and protected from eavesdropping by unauthorized parties on the network.
Option B, "It prevents Denial of Service (DoS) attacks against Mobility Controllers' (MCs') control plane," is incorrect. While CPSec enhances security by authenticating APs and encrypting traffic, it is not specifically designed to prevent DoS attacks. DoS attacks against the control plane are mitigated by other features, such as rate limiting or firewall policies on the MC.
Option C, "It protects wireless clients' traffic, tunneled between APs and Mobility Controllers, from eavesdropping," is incorrect. CPSec protects the control plane (management traffic), not the data plane (client traffic). Client traffic in a tunneled architecture (e.g., GRE tunnels) is protected by the client's wireless encryption (e.g., WPA3), not CPSec.
Option D, "It prevents access from unauthorized IP addresses to critical services, such as SSH, on Mobility Controllers (MCs)," is incorrect. CPSec does not control access to services like SSH on the MC. Access to such services is managed by other features, such as access control lists (ACLs) or management authentication settings on the MC.
The HPE Aruba Networking AOS-8 8.11 User Guide states:
"Control Plane Security (CPSec) enhances network security by protecting the management traffic between Access Points (APs) and Mobility Controllers (MCs). When CPSec is enabled, the control plane communication is secured using certificate-based authentication and IPSec encryption, preventing eavesdropping and ensuring that only authorized APs can communicate with the MC. This protects sensitive management data, such as AP configuration and status updates, from being intercepted." (Page 392, CPSec Overview Section) Additionally, the HPE Aruba Networking CPSec Deployment Guide notes:
"CPSec secures the control plane by encrypting management traffic between APs and MCs, ensuring that attackers cannot eavesdrop on or tamper with this communication. It does not protect client data traffic, which is secured by wireless encryption protocols like WPA3." (Page 8, CPSec Benefits Section)
:
HPE Aruba Networking AOS-8 8.11 User Guide, CPSec Overview Section, Page 392.
HPE Aruba Networking CPSec Deployment Guide, CPSec Benefits Section, Page 8.

155. Frage
Refer to the exhibit.

You need to ensure that only management stations in subnet 192.168.1.0/24 can access the ArubaOS-Switches' CLI. Web Ul. and REST interfaces The company also wants to let managers use these stations to access other parts of the network What should you do?

A. Establish a Control Plane Policing class that selects traffic from 192.168 1.0/24.
B. Configure the switch to listen for these protocols on OOBM only.
C. Specify 192.168.1.0.255.255.255.0 as authorized IP manager address
D. Specify vlan 100 as the management vlan for the switches.

Antwort: C

Begründung:
To ensure that only management stations in the subnet 192.168.1.0/24 can access the ArubaOS-Switches' Command Line Interface (CLI), Web UI, and REST interfaces, while also allowing managers to access other parts of the network, you should specify 192.168.1.0 255.255.255.0 as the authorized manager IP address on the switches. This configuration will restrict access to the switch management interfaces to devices within the specified IP address range, effectively creating a management access list.
References:
ArubaOS-Switch management and configuration guide detailing IP authorized manager settings.
Network management best practices which recommend controlling access to network devices' management interfaces.

156. Frage
What is one of the policies that a company should define for digital forensics?

A. which type of EAP method is most secure for authenticating wired and wireless users with 802.1
B. to which resources should various users be allowed access, based on their identity and the identity of their clients
C. what are the first steps that a company can take to implement micro-segmentation in their environment
D. which data should be routinely logged, where logs should be forwarded, and which logs should be archived

Antwort: D

Begründung:
In the context of digital forensics, policy A is the most relevant. It defines which data should be logged, where logs should be forwarded for analysis or storage, and which logs should be archived for future forensic analysis or audit purposes. This ensures that evidence is preserved in a way that supports forensic activities.

157. Frage
Refer to the exhibit.

A diem is connected to an ArubaOS Mobility Controller. The exhibit snows all Tour firewall rules that apply to this diem What correctly describes how the controller treats HTTPS packets to these two IP addresses, both of which are on the other side of the firewall
10.1 10.10
203.0.13.5

A. It drops the packet to 10.1.10.10 and permits the packet to 203.0.13.5.
B. It drops both of the packets
C. it permits both of the packets
D. It permits the packet to 10.1.10.10 and drops the packet to 203 0.13.5

Antwort: C

158. Frage
......

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