View Full Huawei H12-811 Exam Dumps and Practice Test Dumps

 

Question 301

Which protocol is used to establish neighbor relationships in OSPF?

1. BGP
2. OSPF Hello
3. DHCP
4. FTP

Correct Answer: 2

Explanation:

OSPF Hello packets are used by OSPF routers to discover neighboring routers and establish neighbor relationships. These packets allow routers to exchange important parameters such as area information, timers, and router identifiers. If the required parameters match, routers can form an adjacency and exchange link-state information. Hello packets are also used to maintain established neighbor relationships by being transmitted periodically. BGP serves inter-domain routing, DHCP provides host configuration, and FTP transfers files. Therefore, OSPF Hello packets are fundamental to discovering and maintaining OSPF neighbors within a routed network.

Question 302

Which Ethernet frame field identifies the receiving device?

1. Source MAC
2. VLAN ID
3. Destination MAC
4. EtherType

Correct Answer: 3

Explanation:

The destination MAC address field identifies the intended receiving device for an Ethernet frame on the local Layer 2 network. A switch examines this address to determine where the frame should be forwarded. The source MAC address identifies the device that transmitted the frame, while VLAN identification may indicate the logical broadcast domain. EtherType identifies the encapsulated upper-layer protocol or frame type. By learning source addresses and examining destination addresses, Ethernet switches can forward frames efficiently through appropriate interfaces. Therefore, the destination MAC field is the key field used to identify the intended Layer 2 recipient.

Question 303

Which command enters system view on Huawei VRP?

1. system-view
2. user-view
3. interface-view
4. quit

Correct Answer: 1

Explanation:

The Huawei VRP system-view command enters the system view from the user view. System view is the primary configuration environment where administrators can modify global device settings and enter more specific configuration views. From system view, administrators can configure interfaces, routing protocols, VLANs, security settings, and many other device functions. User view is the initial command-line environment, while interface view is used after selecting a specific interface. The quit command moves out of the current view. Therefore, system-view is the standard command used to begin device configuration on Huawei VRP.

Question 304

Which protocol uses port 23 by default?

1. SSH
2. Telnet
3. HTTPS
4. DNS

Correct Answer: 2

Explanation:

Telnet uses TCP port 23 by default and provides remote terminal access to network devices and hosts. However, Telnet transmits information without the strong encryption provided by SSH, making it unsuitable for many environments where secure management is required. SSH commonly uses TCP port 22, HTTPS normally uses TCP port 443, and DNS commonly uses port 53. Understanding default service ports helps administrators identify traffic, troubleshoot connectivity, and create appropriate security policies. Therefore, TCP port 23 is traditionally associated with Telnet-based remote terminal communication.

Question 305

Which address represents the IPv4 loopback interface?

1. 127.0.0.1
2. 169.254.1.1
3. 224.0.0.1
4. 192.168.1.1

Correct Answer: 1

Explanation:

The IPv4 address 127.0.0.1 is the commonly used loopback address. It refers to the local host itself rather than a remote device. Applications and administrators can use loopback communication to test the local TCP/IP stack without sending traffic onto a physical network interface. The entire 127.0.0.0/8 block is reserved for loopback purposes. Addresses in the 169.254.0.0/16 range are link-local, 224.0.0.0/4 is associated with multicast, and 192.168.1.1 belongs to a private address range. Therefore, 127.0.0.1 is the standard IPv4 loopback address.

Question 306

Which protocol is used to exchange routing information between OSPF routers?

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

Correct Answer: 2

Explanation:

OSPF routers exchange routing and topology information using the OSPF protocol. Through various OSPF packet types, routers establish adjacencies, synchronize link-state databases, and communicate information about network links. This shared topology information allows each router to calculate suitable paths using the Shortest Path First algorithm. FTP is designed for file transfer, SMTP handles email transmission, and SNMP supports network monitoring and management. OSPF therefore provides the mechanisms required for routers within the same OSPF routing domain to build a consistent understanding of network topology and determine reachable destinations.

Question 307

Which device function separates broadcast domains?

1. Hub
2. Repeater
3. Router
4. Media converter

Correct Answer: 3

Explanation:

A router separates broadcast domains because broadcasts received on one routed interface are not normally forwarded into another network interface. Each routed interface represents a different Layer 3 network boundary. This behavior prevents broadcasts from automatically propagating throughout interconnected networks and helps control broadcast traffic. Hubs and repeaters operate at lower network layers and do not create separate Layer 3 broadcast domains. A media converter primarily changes the physical transmission medium. Therefore, routers are commonly used to separate broadcast domains and provide controlled communication between different IP networks.

Question 308

Which protocol commonly uses TCP port 443?

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

Correct Answer: 2

Explanation:

HTTPS commonly uses TCP port 443 for secure web communication. It combines HTTP with TLS protection, allowing data exchanged between a client and server to be encrypted and helping protect information from interception or unauthorized modification. Standard HTTP commonly uses TCP port 80, Telnet uses port 23, and traditional FTP control communication commonly uses TCP port 21. Knowing standard service ports is useful when configuring firewalls, analyzing traffic, and troubleshooting connectivity. Therefore, TCP port 443 is conventionally associated with HTTPS and encrypted web-based communication.

Question 309

Which IPv4 address is used as the limited broadcast address?

1. 255.255.255.255
2. 127.0.0.1
3. 224.0.0.1
4. 0.0.0.0

Correct Answer: 1

Explanation:

The IPv4 address 255.255.255.255 represents the limited broadcast address. Packets sent to this address are intended for all IPv4 hosts on the local network segment and are not routed across network boundaries. It is commonly associated with local broadcast operations where the sender does not need to identify a particular subnet address. The address 127.0.0.1 is used for loopback, 224.0.0.1 is an IPv4 multicast address, and 0.0.0.0 has several special meanings depending on context. Therefore, 255.255.255.255 is the standard limited broadcast address.

Question 310

Which protocol provides automatic IPv6 address configuration?

1. FTP
2. RIP
3. SLAAC
4. SMTP

Correct Answer: 3

Explanation:

SLAAC, or Stateless Address Autoconfiguration, allows IPv6 hosts to automatically configure their addresses without requiring a traditional stateful DHCP server. Routers advertise network prefixes through Router Advertisement messages, and hosts use the information to construct appropriate IPv6 addresses. This simplifies IPv6 deployment and reduces manual configuration requirements. FTP provides file transfer, RIP is a routing protocol, and SMTP is used for email transmission. SLAAC is therefore an important IPv6 mechanism for automatic address configuration, particularly in networks where hosts should obtain addressing information directly from IPv6 router advertisements.

Question 311

Which protocol provides centralized network access accounting?

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

Correct Answer: 1

Explanation:

RADIUS provides centralized authentication, authorization, and accounting for network access. Its accounting capability allows a network access system to record information about user sessions, such as session start and stop events or other usage details. This can help administrators maintain centralized records and support auditing of network access. ARP resolves IPv4 addresses to MAC addresses, NTP synchronizes clocks, and ICMP provides control and diagnostic messaging. RADIUS is commonly integrated with wireless networks, VPN services, and other access-control systems. Therefore, centralized accounting of network-access sessions is one of the functions associated with RADIUS.

Question 312

Which topology connects every device to a central device?

1. Ring
2. Bus
3. Mesh
4. Star

Correct Answer: 4

Explanation:

A star topology connects individual network devices to a central device, such as an Ethernet switch. Each endpoint typically has its own connection to the central point, making troubleshooting and expansion relatively straightforward. If one endpoint cable fails, other endpoints can normally continue operating because their connections are separate. In a ring topology, devices form a circular path; a bus topology uses a shared communication medium; and a mesh topology provides multiple interconnections between devices. Therefore, a network where every endpoint connects to a central device is described as a star topology.

Question 313

Which OSPF component stores learned link-state information?

1. ARP cache
2. MAC table
3. LSDB
4. DHCP pool

Correct Answer: 3

Explanation:

The OSPF Link-State Database, or LSDB, stores information about the topology of the OSPF routing domain. OSPF routers exchange link-state advertisements and use the received information to build their local LSDB. The router then runs the Shortest Path First algorithm against this database to calculate routes. An ARP cache stores IP-to-MAC mappings, a MAC table records Layer 2 address learning information, and a DHCP pool contains address-assignment resources. Therefore, the LSDB is the OSPF component responsible for maintaining the link-state information required for topology calculation and routing decisions.

Question 314

Which technology allows communication between different VLANs?

1. Inter-VLAN routing
2. Port security
3. MAC learning
4. Storm control

Correct Answer: 1

Explanation:

Inter-VLAN routing enables devices belonging to different VLANs to communicate with one another through Layer 3 routing. Because each VLAN normally represents a separate broadcast domain, traffic cannot cross directly between VLANs at Layer 2. A router or Layer 3 switch can provide the required routing interfaces or gateways for the VLANs. Port security controls device access to switch ports, MAC learning builds forwarding information, and storm control limits excessive traffic. Therefore, inter-VLAN routing is the mechanism that permits controlled communication between separate VLAN-based networks.

Question 315

Which protocol detects neighboring devices at Layer 2?

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

Correct Answer: 2

Explanation:

LLDP, or Link Layer Discovery Protocol, enables network devices to advertise information about themselves to directly connected neighbors. Devices can exchange details such as system identity, interface information, capabilities, and management addresses. Administrators can use this information to understand physical connectivity and identify neighboring equipment without manually tracing every cable. BGP and OSPF exchange routing information, while DHCP provides network configuration to hosts. LLDP is therefore specifically intended for Layer 2 neighbor discovery and is useful for network documentation, topology verification, and troubleshooting connectivity between directly connected devices.

Question 316

Which method assigns IP addresses manually to hosts?

1. Static addressing
2. DHCP relay
3. SLAAC
4. Address pooling

Correct Answer: 1

Explanation:

Static addressing assigns a specific IP configuration manually to an individual host. An administrator typically enters the IP address, subnet mask or prefix, default gateway, and DNS information directly into the device configuration. This approach provides predictable addressing and can be useful for infrastructure devices that need stable addresses. DHCP automatically assigns addresses, SLAAC provides automatic IPv6 configuration, and address pooling refers to a collection of addresses available for allocation. Static addressing therefore requires deliberate manual configuration and is often used where fixed network identities are desirable.

Question 317

Which protocol is designed for secure network management sessions?

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

Correct Answer: 3

Explanation:

SSH is designed to provide secure remote management sessions for network devices and systems. It encrypts the communication channel and protects credentials and management commands from being transmitted openly across the network. Administrators can use SSH to access command-line interfaces for configuration, monitoring, and troubleshooting. Telnet also provides remote terminal access but does not provide equivalent encryption by default. FTP and TFTP are primarily file-transfer protocols rather than secure interactive management protocols. Therefore, SSH is the preferred protocol among these choices when secure remote command-line network management is required.

Question 318

Which mechanism can prioritize voice traffic over ordinary data?

1. VLAN
2. QoS
3. NAT
4. ARP

Correct Answer: 2

Explanation:

QoS, or Quality of Service, can prioritize voice traffic so that delay-sensitive communication receives appropriate treatment during periods of network congestion. Voice applications are particularly sensitive to delay, jitter, and packet loss, so QoS policies can classify and mark traffic and place it into suitable queues. VLANs provide logical segmentation, NAT performs address translation, and ARP resolves IPv4 addresses to MAC addresses. QoS can therefore help maintain acceptable voice performance by managing how different traffic classes are handled throughout the network, particularly when available bandwidth becomes limited.

Question 319

Which IPv6 address type identifies a group of receivers?

1. Unicast
2. Anycast
3. Multicast
4. Link-local

Correct Answer: 3

Explanation:

An IPv6 multicast address identifies a group of interfaces that are interested in receiving specific traffic. When a sender transmits to a multicast address, the network can deliver the traffic to participating group members rather than sending separate copies individually from the source. IPv6 multicast is used by several network functions and applications that require group communication. Unicast identifies a particular interface, anycast identifies a set of interfaces while targeting the nearest one, and link-local describes a scope rather than a multicast group type. Therefore, multicast is the appropriate IPv6 address type for group communication.

Question 320

Which command displays the current system time on Huawei VRP?

1. display clock
2. display version
3. display users
4. display interface

Correct Answer: 1

Explanation:

The Huawei VRP display clock command displays the device’s current system time and related clock information. Administrators can use this command when verifying time configuration, troubleshooting timestamp discrepancies, or confirming whether a device is synchronized correctly. Accurate device time is important for logs, event correlation, authentication mechanisms, and network troubleshooting. display version provides software and hardware information, display users shows user-related information, and display interface provides interface details. Therefore, display clock is the appropriate Huawei VRP command for checking the current system clock.