View Full HP HPE7-A08 Exam Dumps and Practice Test Dumps.

 

Question 341

Which protocol is used to automatically discover neighboring network devices on an Ethernet connection?

1. DHCP
2. RADIUS
3. LLDP
4. BGP

Correct Answer: 3

Explanation

Link Layer Discovery Protocol (LLDP) allows network devices to advertise information about themselves to directly connected neighbors. This information can help administrators identify neighboring devices, connected interfaces, device capabilities, and other topology details. LLDP operates at the data-link layer and is particularly useful for documenting physical connectivity and troubleshooting incorrect cabling. DHCP provides IP configuration, RADIUS handles authentication, and BGP exchanges routing information. On an Aruba CX switch, LLDP information can be examined to determine which device is connected to a particular physical interface.

Question 342

Which command is most appropriate for viewing the current MAC address table on an Aruba CX switch?

1. show mac-address-table
2. show ip route
3. show vlan
4. show ntp status

Correct Answer: 1

Explanation

The MAC address table contains learned Layer 2 forwarding information that allows a switch to associate MAC addresses with interfaces and VLANs. The show mac-address-table command can be used to inspect this information on an Aruba CX switch. This is useful when troubleshooting switching behavior, unexpected forwarding, or endpoint connectivity. show ip route displays Layer 3 routes, show vlan focuses on VLAN configuration, and show ntp status provides time-synchronization information. Examining the MAC table can help determine where a switch has learned a particular endpoint.

Question 343

Which routing protocol uses areas to provide a hierarchical network design?

1. BGP
2. DHCP
3. RADIUS
4. OSPF

Correct Answer: 4

Explanation

OSPF supports hierarchical routing through the use of areas. Area 0 is the backbone area and provides the central structure for communication between other OSPF areas. Dividing a large routing domain into areas can reduce the size of link-state databases and limit the scope of certain routing information. BGP is primarily used for interdomain routing, DHCP provides IP configuration, and RADIUS provides authentication services. Proper OSPF area design can improve scalability and make routing operations easier to manage in larger enterprise networks.

Question 344

What is the main purpose of a default route?

1. To identify directly connected hosts
2. To provide a path when no more specific route exists
3. To assign IP addresses to clients
4. To prevent Layer 2 loops

Correct Answer: 2

Explanation

A default route provides a forwarding path for destinations that do not have a more specific matching route in the routing table. In IPv4, the default route is represented as 0.0.0.0/0. It is commonly used on enterprise edge routers or Layer 3 switches to forward Internet-bound traffic toward an upstream router or firewall. Directly connected routes represent local networks, DHCP assigns host configuration, and STP is used to prevent Layer 2 loops. A properly configured default route can simplify routing tables and provide predictable handling of unknown destinations.

Question 345

Which Aruba CX technology is designed to provide high availability by connecting two switches as a coordinated pair?

1. NTP
2. SNMP
3. VSX
4. NAT

Correct Answer: 3

Explanation

Virtual Switching Extension (VSX) allows two Aruba CX switches to operate as a coordinated high-availability pair. The architecture can provide redundant connectivity and reduce dependence on a single physical switch. VSX uses mechanisms such as a peer link and keepalive communication to maintain awareness of peer status. NTP provides time synchronization, SNMP provides management information, and NAT performs address translation. VSX is particularly valuable in network designs where devices need redundant connections to two switches while maintaining reliable forwarding and operational continuity.

Question 346

Which protocol is commonly used to authenticate users through a centralized AAA server?

1. RADIUS
2. OSPF
3. LLDP
4. LACP

Correct Answer: 1

Explanation

RADIUS is commonly used to provide centralized authentication, authorization, and accounting services. Network devices can send authentication requests to a RADIUS server rather than maintaining all user credentials locally. This allows organizations to centralize identity management and apply consistent access policies across multiple devices. RADIUS can also be used with technologies such as 802.1X for network access control. OSPF is a routing protocol, LLDP provides neighbor discovery, and LACP manages link aggregation. Centralized authentication can make network administration easier and improve consistency across a larger infrastructure.

Question 347

Which protocol can synchronize the clocks of multiple network devices?

1. NTP
2. DHCP
3. ARP
4. VRRP

Correct Answer: 1

Explanation

Network Time Protocol (NTP) is used to synchronize the clocks of network devices with configured time sources. Accurate and consistent time is important for event logging, troubleshooting, security monitoring, authentication, and correlating events across different systems. Devices can synchronize with an NTP server or another trusted time source. DHCP provides IP configuration, ARP resolves IPv4 addresses to MAC addresses, and VRRP provides gateway redundancy. Proper NTP configuration helps administrators determine the sequence of events when analyzing logs from multiple network devices.

Question 348

Which mechanism allows several physical Ethernet links to operate as one logical connection?

1. VRRP
2. LACP
3. NTP
4. SNMP

Correct Answer: 2

Explanation

LACP, or Link Aggregation Control Protocol, can dynamically negotiate and maintain link aggregation between compatible devices. Multiple physical Ethernet links can operate together as a logical aggregated connection, providing redundancy and potentially increasing aggregate bandwidth. LACP helps determine whether links are suitable for participation in the aggregation. VRRP provides gateway redundancy, NTP synchronizes clocks, and SNMP provides network-management information. LACP is commonly used between switches or between a switch and a server when multiple physical connections need to function as a single logical link.

Question 349

Which IPv4 address range is reserved for private addressing?

1. 172.16.0.0/12
2. 8.8.8.0/24
3. 224.0.0.0/4
4. 127.0.0.0/8

Correct Answer: 1

Explanation

The 172.16.0.0/12 address range is one of the three major IPv4 private address ranges. It includes addresses from 172.16.0.0 through 172.31.255.255 and is intended for internal network use. The other private ranges are 10.0.0.0/8 and 192.168.0.0/16. The 8.8.8.0/24 range is publicly routable, 224.0.0.0/4 is used for multicast, and 127.0.0.0/8 is reserved for loopback. Private addresses are commonly translated through NAT when internal devices need Internet access.

Question 350

Which Aruba CX feature can provide real-time analytics about network and switch conditions?

1. STP
2. DHCP
3. NAE
4. FTP

Correct Answer: 3

Explanation

The Network Analytics Engine (NAE) provides analytics and monitoring capabilities on supported Aruba CX switches. NAE agents can monitor selected system and network conditions and provide information when specific events or thresholds occur. This allows administrators to detect issues proactively and investigate abnormal behavior. STP prevents Layer 2 loops, DHCP provides IP configuration, and FTP is a file-transfer protocol. NAE can be especially valuable when troubleshooting because it can continuously monitor conditions that might otherwise require administrators to run commands manually and repeatedly.

Question 351

Which technology allows an IPv4 router to translate private source addresses into public addresses?

1. STP
2. NAT
3. LLDP
4. LACP

Correct Answer: 2

Explanation

Network Address Translation (NAT) translates IP addresses between different addressing domains. A common deployment translates private IPv4 source addresses into public addresses when internal hosts communicate with external networks. NAT can reduce the number of public IPv4 addresses required by an organization and allows internal addressing schemes to remain private. STP handles Layer 2 loop prevention, LLDP provides neighbor discovery, and LACP aggregates physical links. NAT is often implemented on routers, firewalls, or other Layer 3 devices at the boundary between an internal network and an external network.

Question 352

Which feature allows IPv6 hosts to learn an IPv6 network prefix from router advertisements and configure an address automatically?

1. NAT
2. DHCP snooping
3. SLAAC
4. ARP

Correct Answer: 3

Explanation

Stateless Address Autoconfiguration (SLAAC) allows IPv6 hosts to configure addresses using information received through Router Advertisement messages. The router advertises a network prefix, and the host uses that information to generate an IPv6 address. SLAAC can significantly simplify IPv6 deployment because administrators do not need to manually configure every host address. NAT and ARP are traditionally associated with IPv4, while DHCP snooping is a Layer 2 security feature. When troubleshooting SLAAC, administrators should verify Router Advertisements, IPv6 connectivity, and the advertised prefix.

Question 353

Which security feature can use DHCP snooping information to validate ARP packets?

1. Dynamic ARP Protection
2. NTP
3. OSPF
4. BGP

Correct Answer: 1

Explanation

Dynamic ARP Protection can use trusted IP-to-MAC binding information to validate ARP packets. DHCP snooping can create binding entries based on legitimate DHCP transactions, and Dynamic ARP Protection can use those entries to determine whether ARP information is consistent with expected address mappings. This can help protect against ARP spoofing and poisoning attacks within a Layer 2 network. NTP synchronizes time, OSPF provides internal routing, and BGP exchanges routing information. Combining these security mechanisms can strengthen protection against unauthorized ARP manipulation.

Question 354

Which protocol is used to exchange routing information between different autonomous systems?

1. OSPF
2. BGP
3. DHCP
4. LLDP

Correct Answer: 2

Explanation

Border Gateway Protocol (BGP) is the primary protocol used to exchange routing information between autonomous systems. BGP uses a path-vector approach and supports extensive routing policies through attributes such as local preference, AS path, MED, and others. It is fundamental to Internet routing and can also be used in enterprise environments requiring interdomain or advanced policy-based routing. OSPF is generally used for internal routing, DHCP provides host configuration, and LLDP provides neighbor discovery. BGP configuration requires careful planning because routing policies can significantly influence path selection.

Question 355

Which command would help verify the operational status of switch interfaces?

1. show interface brief
2. show ip ospf
3. show vlan summary
4. show ntp status

Correct Answer: 1

Explanation

The show interface brief command provides a concise view of switch interfaces and their operational states. It is useful for quickly identifying interfaces that are up, down, administratively disabled, or otherwise not operating as expected. Administrators can use this information as an initial troubleshooting step before examining detailed interface statistics. OSPF commands focus on routing information, VLAN commands focus on VLAN configuration, and NTP commands display time-synchronization information. A brief interface summary can quickly reveal whether a physical or logical interface is contributing to a connectivity problem.

Question 356

Which protocol provides gateway redundancy by allowing multiple routers to share a virtual gateway address?

1. SNMP
2. VRRP
3. LACP
4. sFlow

Correct Answer: 2

Explanation

Virtual Router Redundancy Protocol (VRRP) provides first-hop gateway redundancy. Multiple routers can participate in a VRRP group and share a virtual IP address that hosts use as their default gateway. One router performs the active forwarding role, while another can take over when the active router becomes unavailable. SNMP is used for network management, LACP provides link aggregation, and sFlow provides sampled traffic monitoring. VRRP helps maintain gateway availability without requiring hosts to change their configured default gateway whenever the active physical router changes.

Question 357

Which protocol provides sampled network traffic information to a monitoring collector?

1. RADIUS
2. OSPF
3. sFlow
4. NTP

Correct Answer: 3

Explanation

sFlow provides sampled traffic information and interface statistics to a monitoring collector. Instead of capturing every packet, sFlow uses sampling to provide useful visibility into traffic behavior while reducing the processing and storage requirements associated with full packet capture. Administrators can use sFlow data to identify traffic sources, major applications, utilization patterns, and unusual traffic behavior. RADIUS handles authentication, OSPF provides routing, and NTP synchronizes clocks. sFlow is particularly useful for capacity planning and troubleshooting high-utilization links across large network environments.

Question 358

Which port type is designed to carry traffic from multiple VLANs over a single Ethernet link?

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

Correct Answer: 2

Explanation

A trunk port carries traffic for multiple VLANs over a single physical Ethernet connection. VLAN tagging allows the receiving device to identify which VLAN each tagged frame belongs to. Trunks are commonly used between switches and can also connect switches to other devices that support VLAN tagging. An access port normally belongs to one VLAN, a routed port provides Layer 3 connectivity, and a loopback is a logical interface. Proper trunk configuration requires compatible VLAN and tagging settings on both ends of the connection.

Question 359

Which protocol is commonly used by management platforms to collect network-device statistics and status information?

1. SNMP
2. ARP
3. BGP
4. STP

Correct Answer: 1

Explanation

Simple Network Management Protocol (SNMP) is widely used to collect operational information from network devices. Network management platforms can use SNMP to retrieve information such as interface counters, device status, resource utilization, and other management data. Depending on the SNMP version and configuration, security and authentication capabilities differ. ARP resolves IPv4 addresses to MAC addresses, BGP exchanges routing information, and STP prevents Layer 2 loops. SNMP is useful for centralized monitoring because a management system can gather information from many network devices and present it through dashboards and alerts.

Question 360

Which routing concept causes a router to prefer a more specific route over a less specific route?

1. Administrative distance
2. Longest prefix match
3. Load balancing
4. MAC learning

Correct Answer: 2

Explanation

Longest prefix match causes a router to prefer the most specific route that matches a destination address. For example, if a routing table contains both 10.0.0.0/8 and 10.10.10.0/24, traffic destined for 10.10.10.5 matches both prefixes, but the /24 route is more specific and is therefore selected. Administrative distance is used to compare routes learned from different sources, while MAC learning is a Layer 2 switching process. Understanding longest prefix matching is essential when analyzing routing tables and unexpected forwarding decisions.