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Question 241

Which Aruba Central feature can be used to organize managed devices according to a physical branch, campus, or other deployment location?

1. Client Insights
2. Firmware dashboard
3. Device inventory
4. Site

Correct Answer: 4

Explanation

Aruba Central Sites provide a logical way to organize network infrastructure according to physical locations. An organization may have multiple branches, campuses, offices, or other locations, and grouping devices by site makes monitoring and administration easier. Site-based organization can help administrators quickly identify which infrastructure belongs to a particular physical deployment. Client Insights focuses on client visibility, firmware dashboards focus on software versions, and device inventory provides general device information. Therefore, Site is the appropriate Aruba Central feature when devices need to be organized according to their physical deployment locations.

Question 242

Which protocol allows network administrators to securely access the command-line interface of an Aruba switch over an IP network?

1. SSH
2. TFTP
3. SNMP
4. LLDP

Correct Answer: 1

Explanation

SSH provides secure remote command-line access to network devices. It encrypts the management session, helping protect administrator credentials and commands while they travel across the network. SSH is therefore commonly preferred for remote device administration instead of insecure protocols such as Telnet. TFTP is primarily used for simple file transfers, SNMP is used for monitoring and management information, and LLDP provides information about directly connected neighbors. When administrators need an encrypted interactive CLI session with an Aruba switch, SSH is the appropriate protocol.

Question 243

An administrator wants to identify the physical switch port where a particular client MAC address is currently learned. Which table should be examined?

1. ARP table
2. Routing table
3. MAC address table
4. DHCP scope

Correct Answer: 3

Explanation

A switch’s MAC address table records Layer 2 MAC addresses and the interfaces through which those addresses were learned. Administrators can use this information to determine where a particular client or network device is connected within the switching infrastructure. The ARP table maps IPv4 addresses to MAC addresses, the routing table contains Layer 3 forwarding information, and a DHCP scope defines address-allocation parameters. Therefore, the MAC address table is the appropriate source when the administrator needs to locate the switch interface associated with a learned client MAC address.

Question 244

Which feature allows multiple physical links to operate as one logical connection between supported network devices?

1. LACP
2. DHCP snooping
3. RADIUS
4. BPDU Guard

Correct Answer: 1

Explanation

LACP, or Link Aggregation Control Protocol, allows supported network devices to combine multiple physical Ethernet links into a logical link aggregation group. The resulting logical connection can provide additional aggregate bandwidth and redundancy. LACP also helps dynamically negotiate which physical interfaces participate in the aggregation. DHCP snooping protects against unauthorized DHCP activity, RADIUS provides centralized authentication, and BPDU Guard protects edge ports from unexpected spanning-tree BPDUs. Therefore, LACP is the appropriate technology when multiple physical links need to function as one logical connection.

Question 245

Which wireless measurement represents the amount of time a radio channel is occupied by detected wireless activity?

1. RSSI
2. Noise floor
3. SNR
4. Channel utilization

Correct Answer: 4

Explanation

Channel utilization indicates how much of a wireless channel’s available airtime is occupied by detected activity. High channel utilization can indicate that many devices are transmitting or that other RF sources are consuming airtime. This information is useful when evaluating wireless congestion and determining whether channel conditions may contribute to performance problems. RSSI measures received signal strength, noise floor represents background RF energy, and SNR compares signal strength with noise. Therefore, channel utilization is the appropriate measurement for determining how busy a wireless channel is.

Question 246

An administrator needs centralized authentication for network device administrators and wants separate control over authentication and authorization functions. Which protocol is appropriate?

1. SNMP
2. TACACS+
3. DHCP
4. NTP

Correct Answer: 2

Explanation

TACACS+ is designed for centralized authentication, authorization, and accounting of administrative access to network devices. One of its useful characteristics is the ability to separate authentication from authorization, allowing administrators to receive different levels of access according to defined policies. This is particularly useful in larger environments where multiple network administrators require different command privileges. SNMP is primarily used for monitoring and management, DHCP provides host configuration, and NTP synchronizes clocks. Therefore, TACACS+ is the appropriate protocol when centralized administrative authentication and detailed authorization are required.

Question 247

Which feature helps a switch identify legitimate DHCP server interfaces and protect clients from unauthorized DHCP responses?

1. DHCP snooping
2. Root Guard
3. Port mirroring
4. LACP

Correct Answer: 1

Explanation

DHCP snooping allows a switch to distinguish trusted interfaces from untrusted interfaces for DHCP operations. Legitimate DHCP server responses can be expected on trusted interfaces, while DHCP server messages arriving from unauthorized or untrusted interfaces can be blocked or otherwise handled according to the configured policy. This helps protect clients from rogue DHCP servers that could provide incorrect network settings. Root Guard protects spanning-tree root placement, port mirroring copies traffic for monitoring, and LACP aggregates links. Therefore, DHCP snooping is the appropriate feature for protecting DHCP operations.

Question 248

Which Aruba wireless feature can use RF information to dynamically optimize access-point radio channel assignments and transmit power?

1. AirMatch
2. RADIUS
3. DHCP relay
4. LLDP

Correct Answer: 1

Explanation

AirMatch is an Aruba wireless RF management capability that can optimize radio resources by evaluating information about the wireless environment. It can assist with decisions such as channel assignments and transmit-power levels to improve overall radio performance. Dynamic RF optimization is especially useful in environments where access points are deployed close together or where RF conditions change over time. RADIUS provides centralized authentication, DHCP relay forwards DHCP traffic across routed networks, and LLDP identifies neighboring devices. Therefore, AirMatch is the appropriate Aruba feature for automated RF optimization.

Question 249

Which IPv6 feature allows a host to automatically learn information about the local router and IPv6 network prefix?

1. ARP
2. DHCP snooping
3. Router Advertisement
4. LACP

Correct Answer: 3

Explanation

IPv6 Router Advertisements are sent by IPv6 routers to provide hosts with information about the local IPv6 network. This information can include network prefixes, default router information, and configuration flags that influence how hosts obtain additional settings. Router Advertisements are an important part of IPv6 Stateless Address Autoconfiguration and neighbor discovery. ARP is associated with IPv4 address resolution, DHCP snooping protects DHCP traffic, and LACP provides link aggregation. Therefore, Router Advertisement is the appropriate IPv6 mechanism for communicating local router and network-prefix information to hosts.

Question 250

An administrator wants to provide employees and guests with different wireless access policies using the same Aruba access points. What is an appropriate design?

1. Disable VLANs
2. Use one shared SSID
3. Place every client in the management VLAN
4. Use separate SSIDs mapped to appropriate VLANs

Correct Answer: 4

Explanation

Separate SSIDs mapped to appropriate VLANs allow an organization to provide different wireless access policies while using the same physical access points. An employee SSID can map to an internal VLAN with corporate resources, while a guest SSID can map to a restricted VLAN with limited network access. This design provides logical segmentation and makes it easier to apply different security and access-control policies. Using one shared SSID or placing all clients in the management VLAN does not provide equivalent segmentation. Therefore, separate SSIDs with suitable VLAN mappings are appropriate for employee and guest access.

Question 251

Which protocol is commonly used to collect monitoring information from network devices and can also generate notifications for certain events?

1. SNMP
2. SSH
3. OSPF
4. LACP

Correct Answer: 1

Explanation

SNMP, or Simple Network Management Protocol, is commonly used by network management systems to monitor devices and collect operational information. It can provide information about interfaces, system resources, counters, and other supported management objects. SNMP can also use notifications such as traps or informs to alert a management system about selected events. SSH is primarily used for secure interactive management, OSPF is a routing protocol, and LACP manages link aggregation. Therefore, SNMP is the appropriate protocol when centralized monitoring and event notifications are required.

Question 252

Which security mechanism can assign different network access policies to users based on their authenticated identity or role?

1. NTP
2. Role-based access control
3. LLDP
4. Port mirroring

Correct Answer: 2

Explanation

Role-based access control allows network access policies to be associated with an authenticated user’s role or identity. Instead of giving every authenticated user the same level of access, administrators can define different permissions for groups such as employees, contractors, guests, or administrators. This approach can improve segmentation and simplify policy administration when integrated with appropriate authentication services. NTP provides time synchronization, LLDP provides neighbor discovery, and port mirroring copies traffic for analysis. Therefore, role-based access control is the appropriate mechanism for applying different policies according to authenticated identity or role.

Question 253

Which wireless security option provides encryption for an open network without requiring users to enter a shared password?

1. WPA2-Personal
2. WPA2-Enterprise
3. Enhanced Open
4. WEP

Correct Answer: 3

Explanation

Enhanced Open provides wireless encryption for networks intended to operate without a traditional shared password. It is based on Opportunistic Wireless Encryption and improves privacy compared with completely open Wi-Fi. Users do not need to enter a common pre-shared key to establish the encrypted wireless connection. WPA2-Personal relies on a shared key, WPA2-Enterprise uses enterprise authentication mechanisms such as 802.1X, and WEP is an obsolete wireless security technology. Therefore, Enhanced Open is the appropriate choice for passwordless encrypted wireless access.

Question 254

Which feature can prevent an access switch interface from accepting a superior spanning-tree BPDU that could influence the intended root bridge?

1. Root Guard
2. DHCP relay
3. SNMP
4. MAC authentication

Correct Answer: 1

Explanation

Root Guard is used to protect the intended spanning-tree root topology. When configured on an appropriate interface, it prevents a connected device from influencing the spanning-tree root by sending superior BPDUs. If such BPDUs are received, the protected interface can enter a designated protected state according to the platform’s behavior until the superior information is no longer present. DHCP relay forwards DHCP requests, SNMP provides monitoring information, and MAC authentication controls client access. Therefore, Root Guard is the appropriate feature for preventing an unexpected device from becoming influential in the STP topology.

Question 255

Which metric is most directly associated with the strength of a wireless signal received by a client?

1. RSSI
2. VLAN ID
3. DHCP lease
4. MAC aging timer

Correct Answer: 1

Explanation

RSSI, or Received Signal Strength Indicator, provides an indication of the strength of a wireless signal received by a client or radio. Administrators can examine RSSI when troubleshooting wireless coverage, connectivity, and roaming behavior. Although stronger RSSI can indicate better signal conditions, it should not be evaluated alone because noise, interference, channel utilization, and client capabilities also influence wireless performance. VLAN IDs identify network segmentation, DHCP lease information concerns address allocation, and MAC aging timers affect Layer 2 address-table behavior. Therefore, RSSI is the metric directly associated with received wireless signal strength.

Question 256

Which protocol can dynamically exchange routing information between routers and calculate paths within an autonomous system?

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

Correct Answer: 3

Explanation

OSPF, or Open Shortest Path First, is a link-state interior gateway routing protocol used to exchange routing information between routers within an autonomous system. OSPF routers build a view of the network topology and calculate suitable paths based on the protocol’s metrics. This allows routing information to adapt when network conditions or topology change. DNS resolves names, DHCP provides IP configuration, and SNMP is used for monitoring and management. Therefore, OSPF is the appropriate protocol when routers need to dynamically exchange internal routing information.

Question 257

An administrator wants to protect a switch access port by allowing only specific device MAC addresses to use the interface. Which feature should be configured?

1. QoS
2. Port security
3. IGMP snooping
4. NTP

Correct Answer: 2

Explanation

Port security allows an administrator to restrict which MAC addresses are permitted on a switch interface. This can be useful for access ports where the expected connected devices are known. Depending on the configuration, addresses can be manually specified or learned, and the switch can take a defined action when an unauthorized address appears. QoS manages traffic handling, IGMP snooping controls multicast forwarding, and NTP synchronizes device clocks. Therefore, port security is the appropriate feature for limiting an access port to specific MAC addresses.

Question 258

Which Aruba Central capability provides additional visibility into endpoint characteristics and client behavior for troubleshooting?

1. Client Insights
2. LACP
3. Root Guard
4. DHCP relay

Correct Answer: 1

Explanation

Client Insights provides additional visibility into connected endpoints and their characteristics within the Aruba management environment. Such information can help administrators understand client behavior, identify device types, and troubleshoot connectivity or performance issues. Centralized client visibility is useful because wireless and wired problems may originate from endpoint characteristics rather than only from infrastructure configuration. LACP aggregates physical links, Root Guard protects the spanning-tree topology, and DHCP relay forwards DHCP requests between networks. Therefore, Client Insights is the appropriate Aruba Central capability for enhanced endpoint-focused visibility.

Question 259

Which protocol is used to securely transfer files between network devices and a management system using an SSH-based connection?

1. TFTP
2. FTP
3. SCP
4. HTTP

Correct Answer: 3

Explanation

SCP, or Secure Copy Protocol, provides secure file transfers using an SSH-based secure channel. It is useful when administrators need to move supported configuration files, software images, or other files between network infrastructure and a management workstation. Because the transfer occurs through a secure SSH connection, SCP provides stronger protection than traditional TFTP. FTP can transfer files but does not inherently provide the same secure transport, while HTTP is a general web protocol. Therefore, SCP is the appropriate protocol for secure network-device file transfers.

Question 260

Which technology allows a switch to learn which ports have active multicast listeners and forward multicast traffic only toward interested receivers?

1. LLDP
2. Port security
3. DHCP snooping
4. IGMP snooping

Correct Answer: 4

Explanation

IGMP snooping allows a Layer 2 switch to monitor IGMP membership information and determine which switch ports have clients interested in specific multicast groups. The switch can then limit multicast forwarding to the ports that require the traffic instead of flooding it across the entire VLAN. This improves network efficiency, particularly when multicast applications are used. LLDP provides neighbor information, port security controls source MAC addresses, and DHCP snooping protects DHCP operations. Therefore, IGMP snooping is the appropriate technology for controlling multicast forwarding based on active receivers.