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Question 1

An Aruba administrator needs to provide wireless access to users while allowing authentication through an external RADIUS server. Which authentication method should be configured?

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

Correct Answer: 1

Explanation

WPA2-Enterprise uses 802.1X authentication and can integrate with an external RADIUS server to authenticate wireless clients. This provides centralized authentication and allows individual users to have their own credentials rather than sharing a common pre-shared key. Open authentication does not provide wireless client authentication, while WPA2-Personal relies on a shared pre-shared key. MAC filtering can provide an additional control but is not a replacement for enterprise authentication. In an enterprise Aruba wireless environment, WPA2-Enterprise is therefore an appropriate choice when centralized RADIUS-based authentication is required.

Question 2

An Aruba administrator wants to assign different network access policies to wireless clients based on their user roles. Which Aruba capability provides this functionality?

1. RF optimization
2. Role-based access control
3. Channel bonding
4. Band steering

Correct Answer: 2

Explanation

Role-based access control allows Aruba infrastructure to apply different access policies according to the role assigned to a client. Roles can determine which resources a user can access and what network policies are applied to the traffic. This is useful when employees, guests, contractors, and other users require different levels of network access. RF optimization manages wireless radio performance, channel bonding combines wireless channels, and band steering can encourage clients to use a preferred frequency band. Therefore, role-based access control is the appropriate capability for applying differentiated access policies.

Question 3

A network administrator needs to identify which wireless channels are experiencing excessive interference. Which type of Aruba information is most useful?

1. DHCP lease information
2. Routing table information
3. RF statistics
4. DNS records

Correct Answer: 3

Explanation

RF statistics provide information about the wireless radio environment, including channel utilization, interference, noise, and other radio-frequency characteristics. Administrators can use these measurements to identify channels that are experiencing excessive interference or congestion and determine whether wireless configuration changes are necessary. DHCP lease information relates to IP address assignments, routing tables describe Layer 3 forwarding information, and DNS records map names to addresses. These sources do not directly describe wireless radio conditions. Therefore, RF statistics are the most relevant information when troubleshooting channel interference in an Aruba wireless network.

Question 4

An administrator wants to prevent unauthorized devices from connecting to a wireless network by requiring a shared secret configured on both the client and the access point. Which security mechanism should be used?

1. 802.1X
2. Captive portal
3. MAC authentication
4. WPA2-Personal

Correct Answer: 4

Explanation

WPA2-Personal uses a pre-shared key that is configured on both the wireless infrastructure and authorized client devices. Clients must provide the correct shared secret before they can establish the protected wireless connection. 802.1X is normally associated with enterprise authentication using an authentication server such as RADIUS. Captive portals typically require users to authenticate through a web-based interface after connecting to the network, while MAC authentication uses a device’s MAC address as an authentication factor. Therefore, WPA2-Personal is the appropriate choice when a shared secret is required.

Question 5

An Aruba administrator needs to separate guest wireless traffic from internal corporate traffic while using the same physical wireless infrastructure. Which approach should be used?

1. Create separate SSIDs and assign appropriate VLANs
2. Increase transmit power
3. Disable 5 GHz radios
4. Increase the DHCP lease duration

Correct Answer: 1

Explanation

Separate SSIDs can be configured for different user groups, with each SSID mapped to an appropriate VLAN and security policy. A guest SSID can therefore place users into a guest VLAN while the corporate SSID places employees into an internal VLAN. Additional firewall and access-control policies can restrict communication between these networks. Increasing transmit power does not provide logical segmentation, disabling a wireless frequency reduces available radio capacity, and DHCP lease duration controls address allocation timing. Using separate SSIDs with VLAN segmentation is therefore an effective method for separating guest and corporate traffic.

Question 6

Which Aruba technology can dynamically assign a user to a specific role based on authentication information?

1. Static routing
2. Role assignment
3. NAT
4. Port mirroring

Correct Answer: 2

Explanation

Aruba role assignment allows authenticated users or devices to receive network roles based on authentication results and configured policies. The assigned role can determine the user’s access privileges, firewall rules, bandwidth limitations, and other network controls. This provides a flexible way to apply policies based on identity rather than simply relying on the physical connection location. Static routing determines how packets are forwarded, NAT translates addresses, and port mirroring copies traffic for monitoring purposes. Therefore, role assignment is the relevant Aruba capability for dynamically applying user-specific access policies.

Question 7

A wireless administrator wants to improve client connectivity by encouraging compatible devices to use the 5 GHz band instead of the more congested 2.4 GHz band. Which feature can help?

1. DHCP snooping
2. ARP inspection
3. Band steering
4. Static NAT

Correct Answer: 3

Explanation

Band steering can encourage capable wireless clients to associate with a preferred frequency band, commonly 5 GHz, when network conditions and client capabilities support it. The 5 GHz band can provide more available channels and is often less congested than 2.4 GHz, although actual performance depends on the environment and client location. DHCP snooping protects DHCP operations, ARP inspection helps protect against certain ARP-based attacks, and static NAT maps addresses between networks. Therefore, band steering is the feature designed to influence capable clients toward a preferred wireless band.

Question 8

An administrator wants to provide network access to visitors without requiring them to receive internal corporate credentials. Which solution is most appropriate?

1. OSPF authentication
2. Captive portal
3. SNMP polling
4. Static VLAN trunking

Correct Answer: 2

Explanation

A captive portal provides a web-based authentication or acceptance mechanism for guest users before granting normal network access. It is commonly used in guest wireless environments where visitors should not receive internal employee credentials. Depending on the configuration, guests may be required to enter temporary credentials, accept terms, or complete another authentication process. OSPF authentication protects routing protocol exchanges, SNMP polling is used for network monitoring, and VLAN trunking carries traffic for multiple VLANs between network devices. Therefore, a captive portal is a suitable solution for controlled guest access.

Question 9

An Aruba administrator wants to determine whether an access point is experiencing excessive channel utilization caused by nearby wireless networks. Which measurement should be examined?

1. RF channel utilization
2. DNS query rate
3. DHCP scope size
4. TCP window size

Correct Answer: 1

Explanation

RF channel utilization indicates how much of a wireless channel’s available airtime is being used. High utilization can result from client traffic, neighboring access points, interference, or other wireless activity. Examining channel utilization helps administrators determine whether wireless performance problems may be related to congestion or competing transmissions. DNS query rate measures name-resolution activity, DHCP scope size determines how many addresses can be assigned, and TCP window size is related to transport-layer communication. Therefore, RF channel utilization is the most relevant measurement for investigating wireless channel congestion.

Question 10

An administrator needs centralized monitoring of Aruba network devices using a standard network management protocol. Which protocol should be used?

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

Correct Answer: 3

Explanation

SNMP, or Simple Network Management Protocol, is widely used for monitoring and managing network devices. An administrator can use SNMP to collect information such as interface statistics, device status, CPU utilization, memory utilization, and other operational metrics. SNMP-based monitoring systems can also generate alerts when configured thresholds or conditions are reached. FTP is primarily used for file transfers, SMTP is used for email transmission, and NTP synchronizes system time. Therefore, SNMP is the appropriate protocol when centralized network monitoring of Aruba devices is required.

Question 11

An Aruba administrator wants network devices to maintain consistent and accurate system time. Which service should be configured?

1. DNS
2. NTP
3. DHCP relay
4. TFTP

Correct Answer: 2

Explanation

Network Time Protocol, or NTP, synchronizes system clocks across network devices and servers. Accurate time is important for logging, troubleshooting, authentication systems, certificates, monitoring, and security investigations. When devices use a consistent time source, administrators can correlate events across multiple systems more reliably. DNS resolves domain names, DHCP relay forwards DHCP requests between network segments, and TFTP provides simple file transfers. Therefore, NTP should be configured when Aruba network devices need consistent and accurate system time.

Question 12

A wireless client has successfully associated with an access point but cannot access resources outside its local network. Which configuration should be checked first?

1. Radio channel width
2. SSID name
3. Default gateway
4. Antenna orientation

Correct Answer: 3

Explanation

The default gateway is required when a client needs to communicate with destinations outside its local IP subnet. A wireless client can successfully associate with an access point and receive an IP address but still fail to reach remote networks if its gateway information is missing or incorrect. Radio channel width and antenna orientation can affect wireless performance but do not normally determine Layer 3 forwarding to remote networks. The SSID identifies the wireless network but does not itself provide routing. Therefore, the administrator should verify the client’s IP configuration, especially the default gateway.

Question 13

An administrator needs to allow multiple VLANs to traverse a single Ethernet link between two network switches. Which port configuration should be used?

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

Correct Answer: 3

Explanation

A trunk port carries traffic for multiple VLANs across a single physical Ethernet connection. VLAN tags are used to identify traffic belonging to different VLANs as it crosses the trunk. This configuration is commonly used between switches, between switches and wireless infrastructure, and in other situations where multiple VLANs must share one physical link. An access port normally carries traffic for a single VLAN, while a routed port operates at Layer 3 and does not function as a traditional VLAN trunk. A loopback interface is a logical interface rather than a physical trunk connection.

Question 14

An Aruba administrator needs to protect management access to a network device by using encrypted remote CLI communication. Which protocol should be preferred?

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

Correct Answer: 4

Explanation

SSH provides encrypted remote command-line access and protects management credentials and session data from being transmitted in plaintext. It is therefore preferred for secure remote administration of network devices. Telnet does not provide encryption and can expose credentials and session information. HTTP is primarily used for web-based communication, while FTP is designed for file transfer and does not provide the same secure interactive management capability. Administrators should use secure management protocols and restrict management access to authorized networks or users. Therefore, SSH is the appropriate protocol for encrypted remote CLI administration.

Question 15

A network administrator wants to automatically provide IP addresses and other network configuration information to wireless clients. Which service should be used?

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

Correct Answer: 1

Explanation

Dynamic Host Configuration Protocol, or DHCP, automatically provides clients with network configuration information such as IP addresses, subnet masks, default gateways, and DNS server addresses. This eliminates the need to manually configure each wireless client. DNS resolves domain names, SNMP provides monitoring and management capabilities, and Syslog transports or stores log messages. DHCP is therefore the appropriate service when wireless clients need automatic network configuration. Administrators should also ensure that the correct DHCP scope and VLAN configuration are available for the wireless network.

Question 16

An administrator wants to collect event messages from multiple Aruba devices in a centralized logging system. Which protocol is commonly used for this purpose?

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

Correct Answer: 2

Explanation

Syslog is commonly used to send system and event messages from network devices to a centralized logging server. Centralized logging helps administrators troubleshoot problems, review security events, and correlate activity across multiple devices. RADIUS is primarily used for authentication, authorization, and accounting. LDAP provides directory services, while ARP maps IPv4 addresses to MAC addresses on local networks. Therefore, Syslog is the appropriate protocol when Aruba devices need to forward event and system messages to a centralized logging platform.

Question 17

An Aruba administrator needs to authenticate network users against a centralized authentication server. Which protocol is commonly used for this purpose?

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

Correct Answer: 1

Explanation

RADIUS is commonly used to provide centralized authentication, authorization, and accounting for network access. Aruba wireless and wired infrastructure can integrate with a RADIUS server to authenticate users through mechanisms such as 802.1X. Centralized authentication makes it easier to manage user credentials and apply consistent access policies across the network. ICMP is used for network diagnostic and control messages, FTP provides file transfer, and NTP synchronizes system time. Therefore, RADIUS is the appropriate protocol when centralized network-user authentication is required.

Question 18

A wireless administrator wants to reduce the impact of interference by automatically selecting an appropriate radio channel and transmit power. Which Aruba capability is designed for this purpose?

1. DHCP relay
2. Dynamic Radio Management
3. Static routing
4. Network Address Translation

Correct Answer: 2

Explanation

Dynamic Radio Management is designed to help optimize wireless radio operation by automatically adjusting parameters such as channel selection and transmit power according to the wireless environment. This can help reduce interference and improve overall wireless performance as conditions change. DHCP relay forwards DHCP requests between different network segments, static routing defines fixed Layer 3 paths, and NAT translates network addresses. These features do not directly optimize wireless radio parameters. Therefore, Dynamic Radio Management is the appropriate capability for automated radio-frequency optimization.

Question 19

An administrator needs to restrict access to specific network resources based on the identity or role of a wireless client. Which control should be applied?

1. Role-based policy
2. Channel selection
3. Transmit power
4. SSID broadcast

Correct Answer: 1

Explanation

Role-based policies allow administrators to apply access controls according to the identity or assigned role of a client. Different users or devices can receive different permissions, firewall rules, bandwidth policies, and access restrictions. This provides more granular control than simply assigning all wireless clients the same policy. Channel selection and transmit power affect radio operation, while SSID broadcasting determines whether the wireless network name is advertised. Therefore, role-based policy is the appropriate control when network access should depend on a client’s identity or assigned role.

Question 20

An administrator needs to verify whether an Aruba switch interface is receiving and transmitting traffic correctly. Which information should be examined?

1. DNS cache
2. Interface statistics
3. NTP server list
4. RADIUS shared secret

Correct Answer: 2

Explanation

Interface statistics provide useful information about the operational state and traffic activity of a switch interface. Administrators can examine counters such as transmitted packets, received packets, errors, drops, and other interface-level information when troubleshooting connectivity or performance problems. DNS cache information is related to name resolution, NTP server information is related to time synchronization, and a RADIUS shared secret is used for authentication communication. Therefore, interface statistics are the appropriate information to examine when determining whether a switch interface is properly receiving and transmitting network traffic.