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Question 41

An Aruba administrator needs to provide a secure wireless network for employees using centralized authentication. Which solution should be implemented?

1. WPA2-Personal
2. WPA2-Enterprise with 802.1X
3. Open authentication
4. MAC filtering only

Correct Answer: 2

Explanation

WPA2-Enterprise with 802.1X provides enterprise wireless authentication using individual user credentials and commonly integrates with a RADIUS authentication server. This approach allows administrators to centrally manage authentication and apply appropriate access policies based on the authenticated identity. WPA2-Personal uses a shared pre-shared key, while open authentication does not provide meaningful wireless authentication. MAC filtering can identify devices but does not provide the same level of centralized user authentication. Therefore, WPA2-Enterprise with 802.1X is appropriate for enterprise wireless networks where centralized authentication is required.

Question 42

An administrator wants to configure a switch interface to carry traffic for only one VLAN to an attached end device. Which port mode should be used?

1. Trunk
2. Routed
3. Access
4. Loopback

Correct Answer: 3

Explanation

An access port is normally assigned to a single VLAN and is commonly used to connect end devices such as computers, printers, and other clients. Traffic received from the attached device is associated with the configured access VLAN. A trunk port is designed to carry multiple VLANs, while a routed port operates as a Layer 3 interface and does not provide traditional VLAN access. A loopback interface is logical rather than a physical connection to an end device. Therefore, an access port should be used when an attached device needs connectivity to one specific VLAN.

Question 43

A wireless administrator wants to determine the signal strength experienced by a connected client. Which measurement should be examined?

1. RSSI
2. DHCP lease time
3. DNS response time
4. Routing metric

Correct Answer: 1

Explanation

RSSI, or Received Signal Strength Indicator, provides an indication of the received wireless signal level. Administrators can use RSSI information when evaluating client connectivity, coverage, and potential RF performance problems. A weak signal may indicate that a client is too far from an access point, experiencing attenuation, or affected by environmental conditions. DHCP lease time relates to IP address assignment, DNS response time relates to name resolution, and routing metrics influence path selection. Therefore, RSSI is the relevant measurement when an administrator needs to evaluate the wireless signal strength experienced by a client.

Question 44

An Aruba administrator needs to provide guests with Internet access while preventing direct access to internal corporate networks. Which configuration is most appropriate?

1. Put guests in the corporate VLAN
2. Disable client isolation
3. Place guests in a dedicated VLAN with firewall policies
4. Give guests static corporate IP addresses

Correct Answer: 3

Explanation

A dedicated guest VLAN combined with appropriate firewall or access-control policies provides logical separation between guest users and corporate resources. The guest network can be allowed to reach the Internet while access to internal networks is restricted. Placing guests in the corporate VLAN would make segmentation more difficult and could expose internal resources. Disabling client isolation would not provide the required separation, and assigning corporate addresses to guests would place them within the same logical network. Therefore, a dedicated guest VLAN with suitable security policies is the appropriate design for controlled guest Internet access.

Question 45

Which Aruba feature can help optimize wireless radio settings by dynamically selecting channels and adjusting transmit power based on RF conditions?

1. DHCP snooping
2. Dynamic Radio Management
3. RADIUS accounting
4. Static routing

Correct Answer: 2

Explanation

Dynamic Radio Management helps optimize wireless radio operation based on the surrounding RF environment. Depending on the Aruba platform and configuration, it can assist with channel selection and transmit-power adjustments to improve wireless performance and reduce interference. DHCP snooping provides DHCP-related security controls, RADIUS accounting records authentication activity, and static routing defines fixed Layer 3 forwarding paths. These functions do not directly optimize radio parameters. Therefore, Dynamic Radio Management is the appropriate Aruba capability when administrators want wireless infrastructure to automatically respond to changing RF conditions.

Question 46

An administrator needs to ensure that wireless clients use a specific authentication server when connecting through 802.1X. Which service is normally used as the authentication backend?

1. RADIUS
2. Syslog
3. NTP
4. DNS

Correct Answer: 1

Explanation

RADIUS is commonly used as the authentication backend for 802.1X wireless access. The Aruba infrastructure communicates with the RADIUS server to validate user credentials and obtain authentication or authorization information. This provides centralized identity management and allows network administrators to enforce consistent access policies. Syslog is used for event logging, NTP synchronizes system time, and DNS provides name resolution. Therefore, RADIUS is the appropriate backend service for enterprise wireless authentication using 802.1X. Proper configuration of shared secrets, server addresses, and authentication parameters is also important.

Question 47

A network administrator wants to determine whether a switch interface is experiencing a high number of packet errors. Which information should be checked?

1. DNS records
2. Interface error counters
3. NTP configuration
4. RADIUS users

Correct Answer: 2

Explanation

Interface error counters provide valuable information about packets that were received or transmitted with errors. These counters can help identify problems such as physical connectivity issues, faulty cables, hardware problems, or other interface-level conditions. DNS records do not provide interface error information, NTP configuration concerns time synchronization, and RADIUS users relate to authentication. Administrators should examine interface statistics and compare error counters over time when troubleshooting. Therefore, interface error counters are the most relevant information for determining whether a switch interface is experiencing packet errors.

Question 48

An Aruba administrator needs to configure centralized collection of system messages from multiple network devices. Which technology should be used?

1. RADIUS
2. DHCP
3. Syslog
4. ARP

Correct Answer: 3

Explanation

Syslog provides a standard method for sending system and event messages from network devices to centralized logging servers. Centralized logs make troubleshooting easier because administrators can review events from multiple devices in one location. They can also help with operational monitoring, auditing, and security investigations. RADIUS is primarily used for authentication and authorization, DHCP provides IP configuration, and ARP resolves IPv4 addresses to MAC addresses on local networks. Therefore, Syslog is the appropriate technology for centralized collection of Aruba network-device messages.

Question 49

A wireless client can associate with an access point but receives no valid IP address. Which service should the administrator investigate first?

1. DHCP
2. NTP
3. SNMP
4. Syslog

Correct Answer: 1

Explanation

DHCP is responsible for dynamically assigning IP configuration to clients. If a wireless client successfully associates with an access point but does not receive a valid IP address, the administrator should verify DHCP availability, scope configuration, VLAN connectivity, relay configuration where applicable, and related network paths. NTP handles time synchronization, SNMP is used for network management, and Syslog provides event logging. Wireless association alone does not guarantee that Layer 3 addressing will succeed. Therefore, DHCP should be investigated first when a connected wireless client cannot obtain a valid IP configuration.

Question 50

Which wireless security method uses a shared pre-shared key for client authentication?

1. WPA2-Enterprise
2. 802.1X
3. WPA2-Personal
4. RADIUS

Correct Answer: 3

Explanation

WPA2-Personal uses a pre-shared key that is configured on the wireless infrastructure and authorized client devices. Users connect by providing the shared secret rather than authenticating individually through an enterprise authentication server. WPA2-Enterprise generally uses 802.1X with a RADIUS backend and supports individual user authentication. RADIUS is an authentication protocol rather than the shared-key wireless security mode itself. Therefore, WPA2-Personal is the correct option when a wireless network is configured with a shared pre-shared key.

Question 51

An administrator wants to monitor wireless clients and view information such as their connected access point, IP address, and signal characteristics. Which type of Aruba information should be used?

1. Client monitoring details
2. DNS records
3. NTP status
4. Routing protocol database

Correct Answer: 1

Explanation

Aruba client monitoring information provides details about connected wireless clients. Depending on the platform, administrators can view client identifiers, IP addresses, associated access points, authentication status, signal characteristics, VLAN information, and other operational details. This information is useful when troubleshooting individual client connectivity and performance. DNS records focus on name resolution, NTP status concerns time synchronization, and routing databases contain Layer 3 route information. Therefore, client monitoring details are the appropriate source when an administrator needs visibility into wireless client connections and their associated network information.

Question 52

An administrator wants a network device to automatically obtain its clock information from an external time server. Which protocol should be configured?

1. SNMP
2. NTP
3. RADIUS
4. Syslog

Correct Answer: 2

Explanation

NTP enables network devices to synchronize their system clocks with configured time sources. Accurate time is important for event logs, authentication, monitoring, troubleshooting, and security analysis. When multiple Aruba devices use the same reliable NTP source, administrators can correlate events across devices more accurately. SNMP is used for monitoring and management, RADIUS supports centralized authentication, and Syslog transports logging information. Therefore, NTP should be configured when a network device needs to automatically synchronize its clock with an external time server.

Question 53

An Aruba administrator wants to encourage dual-band wireless clients to use 5 GHz when suitable. Which feature should be enabled?

1. Static routing
2. DHCP relay
3. Band steering
4. SNMP polling

Correct Answer: 3

Explanation

Band steering can encourage capable wireless clients to associate with a preferred frequency band. Administrators may use it to encourage dual-band clients toward 5 GHz when appropriate, potentially reducing congestion on the 2.4 GHz band and improving wireless capacity. Actual results depend on client behavior and the RF environment. Static routing controls Layer 3 forwarding, DHCP relay forwards client configuration requests, and SNMP polling collects management information. Therefore, band steering is the feature most directly associated with influencing dual-band clients toward a preferred wireless frequency.

Question 54

A network administrator needs to manage an Aruba switch remotely using an encrypted command-line session. Which protocol should be selected?

1. SSH
2. Telnet
3. FTP
4. TFTP

Correct Answer: 1

Explanation

SSH provides encrypted remote command-line access and protects management credentials and session information from being transmitted in plaintext. It is preferred over Telnet for secure network-device administration because Telnet does not provide equivalent encryption. FTP and TFTP are primarily used for file-transfer operations and are not intended to provide secure interactive CLI management. Administrators should also restrict SSH access to trusted management networks and use strong authentication controls. Therefore, SSH is the appropriate protocol when secure remote command-line management of an Aruba switch is required.

Question 55

An Aruba administrator wants to collect CPU, memory, and interface utilization data from network devices using a centralized monitoring application. Which protocol is appropriate?

1. SMTP
2. SNMP
3. FTP
4. DHCP

Correct Answer: 2

Explanation

SNMP is commonly used by network management systems to collect operational information from network devices. It can provide metrics such as CPU utilization, memory utilization, interface counters, device status, and other supported management information. A centralized monitoring platform can use this data to display dashboards, identify trends, and generate alerts. SMTP is used for email transport, FTP provides file transfer, and DHCP provides network configuration to clients. Therefore, SNMP is the appropriate protocol when an administrator needs centralized monitoring of Aruba device performance and interface statistics.

Question 56

A wireless administrator wants to restrict a specific group of authenticated users to selected network resources. Which Aruba mechanism can apply user-specific access policies?

1. NTP
2. DHCP
3. Role-based access control
4. DNS

Correct Answer: 3

Explanation

Role-based access control allows Aruba administrators to apply network policies based on the role assigned to a user or device. Different roles can have different permissions, firewall rules, bandwidth restrictions, and access to network resources. This provides granular policy enforcement after authentication. NTP handles time synchronization, DHCP provides IP configuration, and DNS provides name resolution. Therefore, role-based access control is the appropriate mechanism when authenticated users need different access privileges according to their assigned roles.

Question 57

An administrator needs to carry several VLANs between an Aruba switch and another network device using one physical Ethernet connection. Which configuration is required?

1. Access port
2. Trunk port
3. Routed port
4. Loopback interface

Correct Answer: 2

Explanation

A trunk port allows multiple VLANs to traverse a single physical Ethernet link. VLAN tagging enables the connected devices to distinguish traffic belonging to different VLANs. Trunks are commonly used between switches and other infrastructure devices that need access to multiple VLANs. An access port normally carries traffic for one VLAN, a routed port operates at Layer 3, and a loopback interface is a logical interface rather than a physical VLAN-carrying connection. Therefore, a trunk port should be configured when multiple VLANs need to traverse one Ethernet link.

Question 58

A wireless administrator wants to determine whether a client is receiving a weak wireless signal from its associated access point. Which value should be examined?

1. RSSI
2. DHCP lease duration
3. DNS TTL
4. Routing preference

Correct Answer: 1

Explanation

RSSI provides an indication of the received wireless signal level at the client or access point. Administrators can use RSSI measurements to evaluate wireless coverage and identify clients that may be operating at the edge of an access point’s effective coverage area. Weak signal levels can contribute to lower data rates, retransmissions, and unreliable connectivity. DHCP lease duration determines how long an IP assignment remains valid, DNS TTL controls caching behavior, and routing preference relates to Layer 3 path selection. Therefore, RSSI is the relevant value when investigating wireless signal strength.

Question 59

An administrator wants to prevent guest users from directly communicating with devices on the corporate network while maintaining Internet connectivity. Which control should be applied?

1. Increase channel width
2. Configure guest VLAN and access-control policies
3. Enable NTP
4. Increase DHCP lease duration

Correct Answer: 2

Explanation

A guest VLAN combined with appropriate access-control or firewall policies provides logical separation between guest and corporate traffic. The policies can permit guest users to reach approved external destinations while blocking access to internal corporate subnets. Increasing channel width changes wireless radio characteristics but does not provide network isolation. NTP only synchronizes system clocks, and DHCP lease duration controls address assignment timing. Therefore, guest VLAN segmentation together with appropriate access-control policies is the suitable approach for preventing guest users from reaching corporate resources while maintaining Internet access.

Question 60

An administrator needs to test basic IP connectivity between an Aruba switch and another reachable network device. Which utility is commonly used?

1. FTP
2. RADIUS
3. Ping
4. NTP

Correct Answer: 3

Explanation

Ping uses ICMP to test basic IP-level reachability between network devices. It can provide useful information about whether a destination responds and can also show round-trip timing and packet loss. A successful ping does not guarantee that every higher-level application or service is functioning, but it is a useful first step in connectivity troubleshooting. FTP is used for file transfers, RADIUS provides authentication and authorization, and NTP synchronizes clocks. Therefore, ping is commonly used when an administrator needs to verify basic IP connectivity between Aruba infrastructure and another network device.