HP HPE6-A90 Exam Dumps<\/b><\/a> and Practice Test Dumps<\/b><\/p>\n <\/p>\n
Question: 361. Which protocol is used to discover the MAC address associated with an IPv4 address on a local network?<\/b><\/p>\n\n- <\/b> ARP<\/span>
\n<\/span>2.<\/b> DNS<\/span>
\n<\/span>3.<\/b> NTP<\/span>
\n<\/span>4.<\/b> DHCP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. ARP<\/span><\/p>\nExplanation:<\/b><\/p>\n
Address Resolution Protocol, or ARP, maps a known IPv4 address to the corresponding MAC address on a local Layer 2 network. When a host needs to send an IPv4 packet to another device on the same subnet, it may use ARP to determine the destination MAC address required to construct the Ethernet frame. DNS resolves hostnames, NTP synchronizes clocks, and DHCP provides network configuration. ARP is therefore an important mechanism for communication between IPv4 devices across an Ethernet network.<\/span><\/p>\nQuestion: 362. Which type of IPv6 address is automatically configured on an interface and is used for communication on the local link?<\/b><\/p>\n\n- <\/b> Global unicast<\/span>
\n<\/span>2.<\/b> Link-local<\/span>
\n<\/span>3.<\/b> Anycast<\/span>
\n<\/span>4.<\/b> Multicast<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. Link-local<\/span><\/p>\nExplanation:<\/b><\/p>\n
IPv6 link-local addresses are used for communication between devices on the same local network segment. They are assigned from the <\/span>FE80::\/10<\/span> range and are commonly present on IPv6-enabled interfaces even when no globally routable IPv6 address has been configured. Link-local addresses are important for functions such as Neighbor Discovery and communication with local IPv6 routers. Global unicast addresses are routable beyond the local link, while multicast addresses identify groups of receivers. Anycast provides access to the nearest instance of a shared address.<\/span><\/p>\nQuestion: 363. What is the primary function of a DHCP lease?<\/b><\/p>\n\n- <\/b> Encrypt traffic between switches<\/span>
\n<\/span>2.<\/b> Identify a device’s MAC vendor<\/span>
\n<\/span>3.<\/b> Define how long a client can use assigned configuration information<\/span>
\n<\/span>4.<\/b> Prevent all routing loops<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Define how long a client can use assigned configuration information<\/span><\/p>\nExplanation:<\/b><\/p>\n
A DHCP lease specifies the period during which a client may use an IP address and associated DHCP configuration supplied by the server. Before the lease expires, the client normally attempts to renew it so that its configuration remains valid. Lease durations can be configured according to network requirements. DHCP does not encrypt switch traffic, identify MAC vendors, or prevent routing loops. Understanding leases is important when troubleshooting address allocation, expiration, renewal, and unexpected changes in client network configuration.<\/span><\/p>\nQuestion: 364. Which switching method begins forwarding an Ethernet frame before receiving the entire frame?<\/b><\/p>\n\n- <\/b> Store-and-forward<\/span>
\n<\/span>2.<\/b> Fragment-free<\/span>
\n<\/span>3.<\/b> Cut-through<\/span>
\n<\/span>4.<\/b> Broadcast forwarding<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Cut-through<\/span><\/p>\nExplanation:<\/b><\/p>\n
Cut-through switching allows a switch to begin forwarding a frame after reading enough of the frame to determine its destination, rather than waiting for the entire frame to arrive. This can reduce forwarding latency compared with store-and-forward switching. Store-and-forward switches receive the complete frame before forwarding it and can perform a full frame check. The choice between switching methods involves trade-offs involving latency and error handling. Therefore, cut-through is the switching method that can begin forwarding before receiving the complete frame.<\/span><\/p>\nQuestion: 365. Which protocol is commonly used to securely transfer files using an SSH-based connection?<\/b><\/p>\n\n- <\/b> TFTP<\/span>
\n<\/span>2.<\/b> SFTP<\/span>
\n<\/span>3.<\/b> SMTP<\/span>
\n<\/span>4.<\/b> SNMP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. SFTP<\/span><\/p>\nExplanation:<\/b><\/p>\n
SFTP, or SSH File Transfer Protocol, provides secure file transfer through an SSH connection. It encrypts the communication between the client and server and can be used to upload, download, and manage files securely. TFTP is a simple file-transfer protocol without comparable built-in security, SMTP is used for email transmission, and SNMP is primarily used for network management and monitoring. SFTP is therefore appropriate when secure file movement is required across a network.<\/span><\/p>\nQuestion: 366. What does a switch normally learn when examining the source MAC address of an incoming Ethernet frame?<\/b><\/p>\n\n- <\/b> The IP address of the default gateway<\/span>
\n<\/span>2.<\/b> The DNS server address<\/span>
\n<\/span>3.<\/b> The source MAC address and its associated ingress port<\/span>
\n<\/span>4.<\/b> The destination subnet mask<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. The source MAC address and its associated ingress port<\/span><\/p>\nExplanation:<\/b><\/p>\n
Ethernet switches learn source MAC addresses by examining incoming frames. The switch records the source MAC address and associates it with the port on which the frame arrived. This information is stored in the switch’s MAC address table and allows future frames destined for that MAC address to be forwarded more efficiently. The switch does not learn a DNS server or subnet mask from the Ethernet source MAC field. MAC learning is therefore fundamental to normal Layer 2 switching behavior.<\/span><\/p>\nQuestion: 367. Which protocol is commonly used to monitor and manage network devices through management information and counters?<\/b><\/p>\n\n- <\/b> SNMP<\/span>
\n<\/span>2.<\/b> FTP<\/span>
\n<\/span>3.<\/b> SMTP<\/span>
\n<\/span>4.<\/b> ARP<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. SNMP<\/span><\/p>\nExplanation:<\/b><\/p>\n
SNMP, or Simple Network Management Protocol, is commonly used to monitor and manage network infrastructure. Network management systems can use SNMP to retrieve information such as interface statistics, device status, and resource utilization. SNMP can also support certain configuration or control operations depending on the version and device implementation. FTP is used for file transfer, SMTP for email transmission, and ARP for IPv4 address resolution. SNMP is therefore the protocol most closely associated with network monitoring and management information.<\/span><\/p>\nQuestion: 368. Which VLAN type is commonly associated with carrying untagged traffic on an IEEE 802.1Q trunk?<\/b><\/p>\n\n- <\/b> Voice VLAN<\/span>
\n<\/span>2.<\/b> Management VLAN<\/span>
\n<\/span>3.<\/b> Native VLAN<\/span>
\n<\/span>4.<\/b> Private VLAN<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 3. Native VLAN<\/span><\/p>\nExplanation:<\/b><\/p>\n
On an IEEE 802.1Q trunk, the native VLAN is traditionally associated with frames that are transmitted without an explicit VLAN tag. The exact behavior and configuration depend on the switch platform, and the native VLAN should be configured consistently between connected devices to avoid traffic problems or security concerns. A voice VLAN is used for voice-device traffic, a management VLAN can be used for device administration, and private VLANs provide specialized Layer 2 isolation. Therefore, the native VLAN is the relevant concept for untagged trunk traffic.<\/span><\/p>\nQuestion: 369. Which routing table entry generally has the longest prefix and therefore the highest specificity?<\/b><\/p>\n\n- <\/b> Default route<\/span>
\n<\/span>2.<\/b> Host route<\/span>
\n<\/span>3.<\/b> Summary route<\/span>
\n<\/span>4.<\/b> Static default gateway<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. Host route<\/span><\/p>\nExplanation:<\/b><\/p>\n
A host route identifies a single IP address and therefore has the most specific prefix for that individual destination. In IPv4, a host route commonly uses a <\/span>\/32<\/span> prefix, while an IPv6 host route commonly uses <\/span>\/128<\/span>. Routing decisions generally prefer the longest matching prefix when multiple routes match a destination. A default route has the least specific prefix, while summary routes intentionally represent broader address ranges. Understanding prefix specificity is essential when analyzing routing-table decisions.<\/span><\/p>\nQuestion: 370. Which IPv4 range is reserved for link-local addressing when a host cannot obtain an address through normal configuration?<\/b><\/p>\n\n- <\/b> 169.254.0.0\/16<\/span>
\n<\/span>2.<\/b> 172.16.0.0\/12<\/span>
\n<\/span>3.<\/b> 192.168.0.0\/16<\/span>
\n<\/span>4.<\/b> 224.0.0.0\/4<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. 169.254.0.0\/16<\/span><\/p>\nExplanation:<\/b><\/p>\n
The IPv4 range <\/span>169.254.0.0\/16<\/span> is reserved for link-local addressing, commonly known as Automatic Private IP Addressing on some operating systems. A host may configure an address from this range when it cannot obtain a normal IPv4 address through DHCP. Link-local addresses are intended for communication on the local network and are not normally routed across routers. The other ranges represent private IPv4 addressing and multicast space. Therefore, <\/span>169.254.0.0\/16<\/span> is the appropriate link-local range.<\/span><\/p>\nQuestion: 371. Which security technology can inspect traffic and enforce rules based on network connections and applications?<\/b><\/p>\n\n- <\/b> Hub<\/span>
\n<\/span>2.<\/b> Firewall<\/span>
\n<\/span>3.<\/b> Repeater<\/span>
\n<\/span>4.<\/b> Patch panel<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 2. Firewall<\/span><\/p>\nExplanation:<\/b><\/p>\n
A firewall is designed to control network traffic according to configured security policies. Depending on its capabilities, a firewall can inspect source and destination addresses, ports, protocols, connection state, and application characteristics. It can permit or deny traffic based on these criteria. A hub simply repeats signals, a repeater regenerates signals, and a patch panel provides physical connectivity without performing traffic inspection. Firewalls are therefore an important component of network security and access control.<\/span><\/p>\nQuestion: 372. Which Ethernet standard is associated with Gigabit Ethernet over copper using twisted-pair cabling?<\/b><\/p>\n\n- <\/b> 1000BASE-T<\/span>
\n<\/span>2.<\/b> 100BASE-TX<\/span>
\n<\/span>3.<\/b> 10BASE-T<\/span>
\n<\/span>4.<\/b> 10GBASE-SR<\/span><\/li>\n<\/ol>\nCorrect Answer:<\/b> 1. 1000BASE-T<\/span><\/p>\nExplanation:<\/b><\/p>\n
1000BASE-T is the Ethernet standard commonly associated with Gigabit Ethernet over copper twisted-pair cabling. It provides 1 Gbps Ethernet connectivity using suitable copper cabling and compatible network interfaces. 100BASE-TX provides Fast Ethernet at 100 Mbps, 10BASE-T provides 10 Mbps Ethernet, and 10GBASE-SR is a 10-Gigabit Ethernet technology designed for multimode fiber. Knowing Ethernet naming conventions helps administrators identify expected speeds, media types, and deployment requirements.<\/span><\/p>\n