HP HPE6-A47 Dumps

To plan a wireless solution upgrade for printers, the architect needs to know whether the printers support 802.1X and the 802.11 standards supported by the printer. These two factors are important for ensuring the compatibility, security, and performance of the wireless network.

• 802.1X is a standard for network access control that provides authentication, authorization, and encryption for devices that connect to a wireless network1. It prevents unauthorized devices from accessing the network resources and protects the data transmission from eavesdropping or tampering. If the printers support 802.1X, the architect can design a wireless solution that leverages this feature to enhance the security and compliance of the network. If the printers do not support 802.1X, the architect may need to consider alternative methods of securing the wireless access, such as MAC address filtering, VPN, or WPA2-PSK2.
• 802.11 is a set of standards that define the specifications and protocols for wireless communication3. Different 802.11 standards have different characteristics, such as frequency, bandwidth, data rate, range, and compatibility. For example, 802.11a operates at 5 GHz and offers up to 54 Mbps, while 802.11b operates at 2.4 GHz and offers up to 11 Mbps3. If the printers support the same or higher 802.11 standards as the wireless network, the architect can design a wireless solution that ensures the optimal performance and reliability of the wireless communication. If the printers support lower or different 802.11 standards than the wireless network, the architect may need to consider the impact of the compatibility issues, such as interference, congestion, or degradation4.

The other options are not as relevant for planning a wireless solution upgrade for printers. Whether the printers are physically locked down or not does not affect the wireless connectivity, unless the lock interferes with the antenna or signal reception. The identity of users who need to access printers is more related to the access control and user management policies, rather than the wireless solution design. Whether the printers support PoE or not does not affect the wireless connectivity, unless the power source is unreliable or insufficient.

References:

• 1: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview/802.1x.htm
• 2: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview/securing-wireless-access.htm
• 3: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview/802.11-standards.htm
• 4: https://www.arubanetworks.com/techdocs/ArubaOS_86_Web_Help/Content/arubaos-solutions/1-overview/compatibility-issues.htm

The architect should follow the guideline of assigning access layer switches IP addresses on a VLAN that is dedicated for switch management. This is a best practice for network management security, as it isolates the switch management traffic from the data traffic, and prevents unauthorized access to the switches. A dedicated VLAN for switch management also simplifies the configuration and monitoring of the switches, and reduces the risk of broadcast storms or VLAN hopping attacks.

The other options are not best practices for network management security:

• Option B is incorrect because enabling DHCP on only the switch Default VLAN is not a secure way of assigning IP addresses to the switches. DHCP stands for Dynamic Host Configuration Protocol, and it is a protocol that automatically assigns IP addresses and other network parameters to devices on a network. However, DHCP can be vulnerable to spoofing or hijacking attacks, where an attacker can impersonate a DHCP server or client, and obtain or alter the network configuration. Moreover, using the Default VLAN for switch management is not recommended, as it is the VLAN that is assigned to all ports by default, and it can be easily accessed by anyone on the network.
• Option C is incorrect because enabling Telnet and setting it to listen on production VLANs is not a secure way of accessing the switches. Telnet stands for Telecommunication Network, and it is a protocol that allows remote login and command execution on a network device. However, Telnet is an insecure protocol, as it sends data in plain text, without any encryption or authentication. This means that anyone who can intercept the network traffic can read or modify the data, and gain unauthorized access to the switches. Moreover, using production VLANs for switch management is not recommended, as it exposes the switch management traffic to the data traffic, and increases the attack surface of the network.
• Option D is incorrect because assigning switches static IP addresses on the same VLAN on which APs are deployed is not a secure way of managing the switches. Static IP addresses are fixed IP addresses that are manually configured on a device, and they do not change unless they are changed by the administrator. However, static IP addresses can be prone to human errors, misconfiguration, or duplication, and they can be difficult to manage and update. Furthermore, using the same VLAN for switch management and AP deployment is not recommended, as it mixes the switch management traffic with the wireless traffic, and creates unnecessary overhead and security risks.

References:

• ArubaOS-Switch Management and Configuration Guide for WC.16.10)
• ArubaOS-Switch Basic Operation Guide for 16.10)
• Aruba Certified Design Professional Official Certification Study Guide (HPE6-A47))

The Aruba SDN Controller is a software component that runs on the Mobility Master (MM) and provides centralized control and management of the network devices and applications that support the SDN services. The SDN Controller communicates with the network devices through the southbound interface (SBI) and exposes the northbound API (NBAPI) for the SDN applications to access the network resources and services1.

One of the SDN applications that can integrate with the Aruba SDN Controller is the Aruba UC and Collaboration Solution, which optimizes the performance and quality of Skype for Business traffic over the wireless network. The Aruba UC and Collaboration Solution consists of three components: the Aruba UC and Collaboration SDN Application, the Aruba UC and Collaboration Dashboard, and the Aruba UC and Collaboration Agent2.

The Aruba UC and Collaboration SDN Application is a software module that runs on the Skype for Business Front End Server and communicates with the Aruba SDN Controller through the NBAPI. The Aruba UC and Collaboration SDN Application monitors the Skype for Business sessions and events, and sends the relevant information to the Aruba SDN Controller, such as the user identity, device type, session type, codec, bandwidth, and quality of service (QoS) requirements2.

The Aruba UC and Collaboration Dashboard is a web-based graphical user interface that provides visibility and analytics of the Skype for Business sessions and events over the wireless network. The Aruba UC and Collaboration Dashboard connects to the Aruba SDN Controller through the NBAPI and displays the information collected by the Aruba UC and Collaboration SDN Application, such as the number of active sessions, session types, session quality, bandwidth consumption, and device distribution2.

The Aruba UC and Collaboration Agent is a software module that runs on the Mobility Controller (MC) and communicates with the Aruba SDN Controller through the SBI. The Aruba UC and Collaboration Agent receives the information from the Aruba UC and Collaboration SDN Application through the Aruba SDN Controller, and applies the appropriate QoS policies and actions on the wireless network, such as prioritizing the Skype for Business traffic, marking the DSCP values, reserving the bandwidth, and adjusting the airtime2.

To support high availability for the SDN services, the Aruba SDN Controller must be deployed in a redundant configuration, with a primary MM and a backup MM. The primary MM runs the active instance of the Aruba SDN Controller, while the backup MM runs the standby instance of the Aruba SDN Controller. The backup MM synchronizes the configuration and state information from the primary MM, and takes over the SDN Controller role in case of a failure or switchover of the primary MM1.

The other options do not provide high availability specifically for the SDN services, although they may provide redundancy for other aspects of the wireless network. A redundant master MC does not run the Aruba SDN Controller, and only provides backup for the master MC role, which is responsible for managing the configuration and licensing of the MCs in the network3. Backup controllers defined on the APs do not run the Aruba SDN Controller, and only provide backup for the local MC role, which is responsible for terminating and managing the APs in the network4. A cluster deployment for MCs does not run the Aruba SDN Controller, and only provides load balancing and fast failover for the APs in the network5.

References: 1: ArubaOS 8.7 User Guide - Aruba, Chapter 42: SDN Controller, pages 1049-1050. 2: Aruba UC and Collaboration Solution Guide - Aruba, Chapter 2: Aruba UC and Collaboration Solution Overview, pages 11-15. 3: ArubaOS 8.7 User Guide - Aruba, Chapter 2: ArubaOS Architecture, pages 25-26. 4: ArubaOS 8.7 User Guide - Aruba, Chapter 3: Configuring Controller Redundancy, pages 39-40. 5: ArubaOS 8.7 User Guide - Aruba, Chapter 4: Configuring Controller Clustering, pages 51-52.