View Full Huawei H12-811 V2.0 Exam Dumps and Practice Test Dumps

 

Question 121.

Which protocol allows a switch to automatically learn the presence and basic information of directly connected neighboring devices?

1. LLDP
   2. DNS
   3. DHCP
   4. FTP

Correct Answer: 1. LLDP

Explanation:

LLDP, or Link Layer Discovery Protocol, enables directly connected network devices to advertise information such as device identity, interface information, and capabilities. It operates at Layer 2 and is useful for topology discovery, documentation, and troubleshooting. DNS resolves names, DHCP assigns IP configuration, and FTP transfers files. LLDP does not perform routing or switching decisions but provides valuable visibility into physical network relationships.

Question 122.

Which Huawei VRP command can display a summary of LLDP neighbors?

1. display arp
   2. display lldp neighbor brief
   3. display ospf peer
   4. display ip routing-table

Correct Answer: 2. display lldp neighbor brief

Explanation:

The display lldp neighbor brief command provides summarized LLDP neighbor information on Huawei VRP devices. It can help an administrator identify which device is connected to a specific local interface. This is particularly useful when verifying cabling and network topology. ARP, OSPF, and routing-table commands provide different operational data and do not directly show LLDP-discovered neighbors.

Question 123.

Which technology combines multiple physical Ethernet links into a single logical interface?

1. VLAN
   2. NAT
   3. Link aggregation
   4. DHCP relay

Correct Answer: 3. Link aggregation

Explanation:

Link aggregation combines multiple physical Ethernet interfaces into one logical link. This can increase aggregate bandwidth and provide redundancy if one member interface fails. Huawei devices commonly implement link aggregation using Eth-Trunk interfaces. VLANs provide logical Layer 2 segmentation, NAT translates IP addresses, and DHCP relay forwards DHCP messages between clients and servers on different networks.

Question 124.

Which Huawei logical interface is commonly used for link aggregation?

1. Vlanif
   2. LoopBack
   3. Tunnel
   4. Eth-Trunk**

Correct Answer: 4. Eth-Trunk

Explanation:

Huawei VRP uses an Eth-Trunk interface to represent a logical bundle of multiple physical Ethernet links. Member interfaces can be combined to provide increased bandwidth and redundancy. Depending on the design and platform, an Eth-Trunk can operate at Layer 2 or Layer 3. Vlanif interfaces provide Layer 3 functionality for VLANs, while LoopBack and tunnel interfaces serve different purposes.

Question 125.

Which protocol can dynamically negotiate and manage an Ethernet link aggregation group?

1. LACP
   2. ARP
   3. ICMP
   4. DNS

Correct Answer: 1. LACP

Explanation:

LACP, or Link Aggregation Control Protocol, dynamically negotiates and manages member links in a link aggregation group. It allows connected devices to determine which links can participate in the bundle and can help provide better resilience than purely static aggregation. ARP resolves IPv4 addresses to MAC addresses, ICMP provides diagnostic and control messaging, and DNS performs name resolution.

Question 126.

Which Huawei VRP command creates and enters Eth-Trunk interface 1?

1. trunk 1
   2. interface Eth-Trunk 1
   3. create eth-trunk 1
   4. link-aggregation 1

Correct Answer: 2. interface Eth-Trunk 1

Explanation:

The interface Eth-Trunk 1 command creates or enters the configuration view of Eth-Trunk interface 1 on Huawei VRP. Physical Ethernet interfaces can then be added as members according to the chosen aggregation mode. Configuring a logical Eth-Trunk simplifies management because VLAN or Layer 3 settings can often be applied to the logical bundle rather than individually to every member link.

Question 127.

Which protocol provides first-hop gateway redundancy by allowing hosts to use a shared virtual IP address?

1. OSPF
   2. STP
   3. VRRP
   4. FTP

Correct Answer: 3. VRRP

Explanation:

VRRP, or Virtual Router Redundancy Protocol, provides gateway redundancy by allowing multiple routers to share a virtual IP address. Hosts use the virtual address as their default gateway. One router operates as the master, while another can take over if the master becomes unavailable. This provides higher availability without requiring end hosts to modify their gateway configuration during a router failure.

Question 128.

In VRRP, which router normally handles forwarding for the virtual gateway during normal operation?

1. Backup router
   2. Root bridge
   3. Area Border Router
   4. Master router**

Correct Answer: 4. Master router

Explanation:

The VRRP master router normally forwards traffic sent to the virtual gateway address. Backup routers monitor the master and can take over if it fails. VRRP therefore provides default-gateway redundancy for hosts. Master election is influenced by priority and other protocol rules. Root bridges and Area Border Routers belong to STP and OSPF respectively and are unrelated to VRRP gateway forwarding.

Question 129.

Which VRRP parameter can be adjusted to make one router more likely to become the master?

1. Priority
   2. VLAN ID
   3. OSPF cost
   4. DNS metric

Correct Answer: 1. Priority

Explanation:

VRRP uses priority as an important factor in master election. A router with a higher VRRP priority is generally more likely to become the master. Administrators can configure priorities so that the preferred device normally provides gateway forwarding. If the master fails, a backup router can take over the virtual IP address and continue forwarding traffic for connected hosts.

Question 130.

Which routing protocol is most commonly associated with exchanging routing information between autonomous systems?

1. RIP
   2. BGP
   3. OSPF
   4. STP

Correct Answer: 2. BGP

Explanation:

BGP, or Border Gateway Protocol, is primarily used to exchange routing information between autonomous systems. It is the main inter-domain routing protocol used on the internet. OSPF and RIP are Interior Gateway Protocols intended mainly for routing within an autonomous system. STP is a Layer 2 protocol for preventing switching loops and does not exchange IP routing information.

Question 131.

Which BGP attribute lists the sequence of autonomous systems through which a route has passed?

1. Local preference
   2. MED
   3. AS_PATH
   4. VLAN ID

Correct Answer: 3. AS_PATH

Explanation:

The BGP AS_PATH attribute records the sequence of autonomous system numbers that a route advertisement has traversed. It is useful for loop prevention because a BGP router can reject a route containing its own AS number. AS_PATH can also influence route selection, with shorter paths often preferred when other selection criteria do not take precedence.

Question 132.

Which type of BGP session is formed between routers in different autonomous systems?

1. iBGP
   2. OSPF adjacency
   3. LACP session
   4. eBGP**

Correct Answer: 4. eBGP

Explanation:

External BGP, or eBGP, is used between routers that belong to different autonomous systems. Internal BGP, or iBGP, is used between BGP routers within the same autonomous system. BGP sessions exchange network reachability information and route attributes. OSPF and LACP operate for entirely different purposes and do not create BGP peer relationships.

Question 133.

Which type of BGP session is formed between routers inside the same autonomous system?

1. iBGP
   2. eBGP
   3. STP
   4. VRRP

Correct Answer: 1. iBGP

Explanation:

Internal BGP, or iBGP, forms peer relationships between routers within the same autonomous system. It is commonly used to distribute externally learned BGP routes throughout the autonomous system. eBGP operates between separate autonomous systems. STP prevents Layer 2 loops, while VRRP provides gateway redundancy, so neither performs BGP route exchange.

Question 134.

Which protocol is designed to automatically assign IP configuration to hosts?

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

Correct Answer: 2. DHCP

Explanation:

DHCP automatically assigns network settings such as IP addresses, subnet masks, default gateways, and DNS server addresses. This reduces manual configuration and lowers the chance of duplicate or incorrect addresses. ARP resolves IPv4 addresses to MAC addresses, SNMP monitors network devices, and NTP synchronizes clocks.

Question 135.

Which feature is required when DHCP clients and the DHCP server are located on different IP subnets and broadcasts cannot cross the router directly?

1. NAT overload
   2. STP
   3. DHCP relay
   4. DNS recursion

Correct Answer: 3. DHCP relay

Explanation:

A DHCP relay forwards DHCP messages between clients and a DHCP server located on another IP subnet. Client DHCP requests begin as local broadcasts, which routers normally do not forward. The relay converts or forwards the request appropriately so it can reach the remote server. This allows organizations to centralize DHCP services while supporting clients on many routed networks.

Question 136.

Which protocol is primarily responsible for synchronizing device clocks over an IP network?

1. FTP
   2. SNMP
   3. LLDP
   4. NTP**

Correct Answer: 4. NTP

Explanation:

NTP, or Network Time Protocol, synchronizes clocks across IP networks. Consistent time is important for log correlation, troubleshooting, authentication, monitoring, and security analysis. FTP transfers files, SNMP manages and monitors devices, and LLDP discovers directly connected neighbors. Network devices should use reliable time sources to ensure that event timestamps remain accurate.

Question 137.

Which protocol allows a network management system to retrieve counters and status information from routers and switches?

1. SNMP
   2. DHCP
   3. ARP
   4. HTTP only

Correct Answer: 1. SNMP

Explanation:

SNMP allows a management system to query network devices for operational information such as interface counters, CPU utilization, errors, and status. Managed devices run SNMP agents and expose information through management objects. Devices can also send unsolicited notifications such as traps. DHCP, ARP, and HTTP serve different purposes and are not the primary standard for network monitoring.

Question 138.

Which Huawei VRP command can be used to view the device’s current system time?

1. display time-zone
   2. display clock
   3. display ntp-only
   4. show clock

Correct Answer: 2. display clock

Explanation:

The display clock command shows the current system time on a Huawei VRP device. Accurate system time is important because logs, alarms, routing events, and security records depend on correct timestamps. NTP can be configured to synchronize the clock automatically. Huawei typically uses display rather than show for operational commands.

Question 139.

Which Huawei VRP command is used to display the currently active configuration?

1. display saved-configuration
   2. display startup
   3. display current-configuration
   4. display active-only

Correct Answer: 3. display current-configuration

Explanation:

The display current-configuration command shows the configuration that is currently active on a Huawei VRP device. It is useful for verifying settings and troubleshooting. This may differ from the saved startup configuration if recent changes have not yet been saved. Administrators should verify and save important changes before rebooting the device.

Question 140.

A Huawei switch can reach devices in VLAN 10 but hosts in VLAN 20 cannot communicate beyond their local subnet. Which configuration should be checked first?

1. STP root priority only
   2. LLDP status
   3. Device hostname
   4. VLAN 20 Vlanif interface and host default-gateway configuration**

Correct Answer: 4. VLAN 20 Vlanif interface and host default-gateway configuration

Explanation:

If VLAN 20 hosts can communicate locally but cannot reach remote networks, the Layer 3 gateway configuration should be checked first. On a Huawei Layer 3 switch, a Vlanif interface can provide the default gateway for that VLAN. The administrator should verify that the Vlanif interface exists, has the correct IP address, is operational, and matches the default gateway configured on the hosts. STP, LLDP, and the device hostname are less likely to explain this specific Layer 3 symptom.