HP Updated HPE6-A47 Exam Questions and Answers by rian

 In local mode, the IAP cluster at the branch office has a local subnet and the master IAP of the cluster acts as the DHCP server and gateway for clients. The local mode provides access to the corporate network using the inner IP of the IPsec tunnel. The local mode is recommended for this scenario because it allows the branch office to remain functional even if the link to the main office fails, as the clients can still obtain IP addresses and access local resources. The local mode also avoids the need for additional routing or switching configuration on the MC or the branch office network12. References:

• 1: Understanding IAP-VPN Architecture - Aruba
• 2: IAP-VPN Forwarding Modes - Aruba

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))

For a VHD wireless network at a large events venue, the architect should ensure that the DHCP and DNS servers are carrier-grade and support a low transaction time. This is because the DHCP and DNS servers are responsible for providing IP addresses and name resolution for the wireless devices, and they need to handle a high volume of requests and responses in a short time. A low transaction time reduces the latency and improves the user experience. A carrier-grade server is a server that meets the high standards of reliability, availability, and scalability required by telecom operators and service providers. A carrier-grade server can handle a large number of concurrent connections, provide redundancy and fault tolerance, and offer high performance and security.

Option A is incorrect because the DHCP server can support a high number of scopes with a /24 size, but this does not guarantee a low transaction time or a carrier-grade service. A scope is a range of IP addresses that the DHCP server can assign to the clients. A /24 size means that each scope can have up to 254 hosts. However, the number of scopes does not affect the speed or quality of the DHCP service. Option B is incorrect because a third-party firewall integrates with ClearPass to filter the guest user traffic, but this does not affect the DHCP and DNS services. A firewall is a device that monitors and controls the network traffic based on predefined rules. ClearPass is a network access control solution that provides secure authentication and policy enforcement. A firewall integration with ClearPass can enhance the security and visibility of the guest user traffic, but it does not improve the performance or reliability of the DHCP and DNS servers. Option C is incorrect because a domain CA is set up to deploy certificates to a high volume of guest devices, but this does not affect the DHCP and DNS services. A certificate authority (CA) is an entity that issues digital certificates that verify the identity and authenticity of the devices. A domain CA is a CA that is part of a domain and can issue certificates to the domain members. A certificate deployment is a process of distributing and installing the certificates to the devices. A certificate deployment can improve the security and trust of the wireless network, but it does not improve the speed or quality of the DHCP and DNS servers. References: Aruba Validated Design: Very High Density 802.11ac Networks), Aruba Validated Design: Campus Wired LAN), Aruba Validated Design: Guest Access)

the new 802.11ac deployment should have a capacity-based design for the best performance, but the existing deployment sounds like a coverage-based design. This is because a capacity-based design takes into account the number and type of clients, the applications they use, and the bandwidth they require. A coverage-based design only considers the signal strength and the absence of coverage holes. A site survey is desirable to determine the optimal locations for the new APs because it can help the architect to assess the current and future capacity needs, identify the sources of interference and noise, and optimize the channel and power settings for the new APs.

Option A is incorrect because an 802.11ac deployment does not necessarily work better with side-mounted APs. The mounting location of the APs depends on the antenna type, the ceiling height, and the RF environment.

Option C is incorrect because 802.11ac AP radios are not more sensitive to 2.4 GHz interference than 802.11n APs. In fact, 802.11ac APs operate in the 5 GHz band, which is less crowded and prone to interference than the 2.4 GHz band.

Option D is incorrect because 802.11ac APs cannot support a higher density of clients by being deployed farther apart. On the contrary, 802.11ac APs need to be deployed closer together to provide the higher data rates and throughput that 802.11ac clients expect.

References: The information can be referenced from the official HPE documents and learning materials available on HPE Press and Aruba Networks. Specifically, it aligns with the objectives outlined in Chapter 4: Wireless LAN Design, where the capacity-based design and site survey methods are discussed. Designing Aruba Solutions Official Certification Study Guide Aruba Mobility Fundamentals Guide