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

 

Question 361.

Which Huawei VRP command is commonly used to verify whether an IPv4 destination is reachable?

1. ping
   2. display vlan
   3. save
   4. display users

Correct Answer: 1. ping

Explanation:

The ping command is commonly used on Huawei VRP devices to test basic IPv4 reachability. It sends ICMP Echo Request packets toward the destination and waits for Echo Reply packets. Successful replies indicate that a Layer 3 path exists and that the destination is responding to ICMP. A failed ping does not always prove that the remote device is unavailable because firewalls or ACLs may block ICMP. Administrators should therefore combine ping with commands such as display ip routing-table, display arp, and tracert when investigating connectivity failures. display vlan, save, and display users provide different functions and do not directly test remote reachability.

Question 362.

Which Huawei VRP command helps identify the Layer 3 hops used to reach a remote destination?

1. display route
   2. tracert
   3. display interface
   4. ping only

Correct Answer: 2. tracert

Explanation:

The tracert command displays the sequence of Layer 3 hops encountered on the path toward a remote destination. It can help identify where packets stop progressing or where an unexpected routing path begins. This makes it especially useful when the local router can reach its next hop but cannot reach a farther network. Not every intermediate router is guaranteed to respond to traceroute probes, so missing entries should be interpreted carefully. Administrators often use tracert together with ping, routing-table inspection, ACL checks, and interface status information to isolate the point of failure. It provides more path detail than a simple reachability test.

Question 363.

Which Huawei VRP command displays routes learned and selected by the IPv4 routing process?

1. display mac-address
   2. display arp
   3. display ip routing-table
   4. display vlan

Correct Answer: 3. display ip routing-table

Explanation:

The display ip routing-table command shows the IPv4 routes known to the Huawei device. The output may include directly connected routes, static routes, and routes learned from protocols such as OSPF or RIP. It can also show destination prefixes, next hops, outbound interfaces, preference values, and metrics. This command is fundamental when troubleshooting Layer 3 communication because it reveals whether the router has a forwarding path toward the destination. If a route is missing, the administrator should investigate interface configuration or route learning. If a route exists but traffic still fails, next-hop reachability, ARP, ACLs, NAT, and return routing should be checked.

Question 364.

Which Huawei VRP command gives a concise summary of IP-enabled interface status and addressing?

1. display version
   2. display clock
   3. display vlan
   4. display ip interface brief**

Correct Answer: 4. display ip interface brief

Explanation:

The display ip interface brief command provides a compact summary of Layer 3 interface information, including configured IPv4 addresses and interface states. It allows administrators to quickly identify interfaces that are down, missing an expected address, or operating in an unexpected state. This is useful before investigating routing protocols because a failed interface may explain why a connected route or neighbor relationship is absent. More detailed information can be obtained with display interface, but the brief command is faster for an overall status check. display version, display clock, and display vlan provide system, time, and VLAN information rather than a concise IP-interface summary.

Question 365.

Which Huawei VRP command displays detailed operational statistics for an interface?

1. display interface
   2. display users
   3. display clock
   4. display ospf routing

Correct Answer: 1. display interface

Explanation:

The display interface command provides detailed interface information such as physical and protocol status, link parameters, packet counters, error statistics, and other operational data. It is useful when investigating packet loss, interface flapping, physical failures, or unexpected traffic behavior. A technician can use the output to determine whether the problem is physical, Layer 2, or potentially higher in the protocol stack. The concise display ip interface brief command is better for a quick overview, while display interface is more appropriate when deeper analysis is required. User, clock, and OSPF commands do not provide the same interface-level detail.

Question 366.

Which routing protocol uses hop count as its primary route-selection metric?

1. OSPF
   2. RIP
   3. BGP
   4. IS-IS

Correct Answer: 2. RIP

Explanation:

RIP is a distance-vector routing protocol that uses hop count as its primary metric. A route with fewer router hops is generally preferred. RIP considers routes with 16 hops unreachable, which limits its scalability in large networks. OSPF and IS-IS are link-state protocols that use different path calculations, while BGP uses path attributes rather than simple hop count. RIP is comparatively simple to configure and understand, but its slower convergence and limited metric make it less suitable for complex enterprise environments. Knowing its metric helps distinguish RIP from protocols such as OSPF, which uses cost.

Question 367.

Which routing protocol uses cost and a link-state database to calculate paths?

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

Correct Answer: 3. OSPF

Explanation:

OSPF is a link-state Interior Gateway Protocol that uses cost as its metric. OSPF routers exchange Link State Advertisements, build a link-state database describing the topology, and then run the Shortest Path First algorithm to determine preferred routes. This allows OSPF to react dynamically to topology changes and scale through the use of areas. RIP uses hop count, BGP relies on path attributes, and VRRP provides default-gateway redundancy rather than route calculation. OSPF is widely used in enterprise networks because it combines fast convergence, flexible path selection, and hierarchical design.

Question 368.

Which protocol is primarily designed to exchange routing information between autonomous systems?

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

Correct Answer: 4. BGP

Explanation:

Border Gateway Protocol, or BGP, is the principal inter-domain routing protocol used to exchange reachability information between autonomous systems. It supports policy-based route selection through attributes such as AS_PATH, NEXT_HOP, LOCAL_PREF, and MED in appropriate contexts. OSPF and RIP are primarily Interior Gateway Protocols used inside an autonomous system, while STP prevents Layer 2 switching loops. BGP is important in service-provider environments, multi-homed enterprise networks, and internet routing. Its design emphasizes scalability and policy control rather than simply selecting the numerically shortest path.

Question 369.

Which BGP attribute records the autonomous systems that a route has passed through?

1. AS_PATH
   2. VLAN ID
   3. OSPF cost
   4. MAC priority

Correct Answer: 1. AS_PATH

Explanation:

The BGP AS_PATH attribute records the sequence of autonomous system numbers that a route advertisement has traversed. This helps prevent routing loops because a BGP router can reject a route advertisement that already contains its own autonomous system number. AS_PATH is also considered during route selection, with shorter paths often being preferred after higher-priority criteria have been considered. VLAN IDs and MAC priorities relate to Layer 2 functions, while OSPF cost is a metric used by OSPF rather than BGP.

Question 370.

Which BGP session type operates between routers in different autonomous systems?

1. iBGP
   2. eBGP
   3. OSPF
   4. LACP

Correct Answer: 2. eBGP

Explanation:

External BGP, or eBGP, is used between BGP routers that belong to different autonomous systems. It is commonly used between an enterprise and an internet service provider or between separate service-provider networks. Internal BGP, or iBGP, is used within the same autonomous system. OSPF and LACP are unrelated protocols used for internal routing and link aggregation respectively. Understanding the distinction between eBGP and iBGP is important because route-advertisement behavior and design considerations differ between the two.

Question 371.

Which BGP session type is used between BGP-speaking routers inside the same autonomous system?

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

Correct Answer: 3. iBGP

Explanation:

Internal BGP, or iBGP, is used between routers within the same autonomous system. It commonly distributes externally learned BGP routes among routers inside the organization so that multiple edge devices can maintain consistent routing information. eBGP is used between different autonomous systems. VRRP and STP do not exchange BGP routes. Large iBGP deployments require careful design because basic iBGP has specific route-propagation rules, and technologies such as route reflectors may be introduced to improve scalability.

Question 372.

Which protocol provides gateway redundancy without requiring hosts to change their configured default gateway?

1. OSPF
   2. STP
   3. LACP
   4. VRRP**

Correct Answer: 4. VRRP

Explanation:

VRRP provides first-hop redundancy by allowing multiple routers or Layer 3 switches to share a virtual IP address. End hosts configure that virtual address as their default gateway. One router operates as the master and handles forwarding, while backup routers can assume the role if the master becomes unavailable. Because the hosts continue using the same virtual gateway address, no manual reconfiguration is needed during failover. OSPF performs routing, STP prevents Layer 2 loops, and LACP manages link aggregation. VRRP specifically protects the first-hop gateway function.

Question 373.

Which VRRP parameter is usually configured to make one router more likely to become master?

1. Priority
   2. OSPF cost
   3. VLAN tag
   4. MAC aging time

Correct Answer: 1. Priority

Explanation:

VRRP priority influences which router becomes master. A higher priority generally makes a device more preferred for the master role. Administrators often configure the primary gateway device with a higher priority so it handles normal forwarding, while a secondary router remains available as a backup. If the primary router fails, another device can assume the master role and continue forwarding traffic for the virtual IP address. OSPF cost, VLAN tags, and MAC aging timers are unrelated to VRRP master election.

Question 374.

Which Huawei logical interface is used to combine multiple physical Ethernet links into one aggregated connection?

1. Vlanif
   2. Eth-Trunk
   3. LoopBack
   4. Console

Correct Answer: 2. Eth-Trunk

Explanation:

An Eth-Trunk interface combines several physical Ethernet links into one logical connection on Huawei devices. This provides greater aggregate bandwidth and improves availability because traffic can continue over remaining members if one physical link fails. The logical interface can be configured as a Layer 2 trunk or, where supported, for Layer 3 operation. Member links should have compatible configuration, and administrators should verify both ends of the bundle. A Vlanif interface acts as a VLAN gateway, LoopBack provides a logical Layer 3 interface, and the console is used for local management access.

Question 375.

Which protocol dynamically negotiates which Ethernet links participate in an aggregation group?

1. OSPF
   2. ARP
   3. LACP
   4. DHCP

Correct Answer: 3. LACP

Explanation:

Link Aggregation Control Protocol, or LACP, dynamically negotiates and manages member interfaces within a link aggregation group. Devices at both ends exchange LACP information to determine which physical links are suitable to participate. This can help detect configuration mismatches and provide a more controlled aggregation environment than purely manual bundling. LACP does not perform IP routing or address assignment. OSPF is a routing protocol, ARP resolves local IPv4-to-MAC mappings, and DHCP assigns network configuration.

Question 376.

Which Huawei VRP command can display operational information about an Eth-Trunk interface?

1. display vlan
   2. display arp
   3. display ospf peer
   4. display eth-trunk**

Correct Answer: 4. display eth-trunk

Explanation:

The display eth-trunk command is used to examine operational information about Huawei Eth-Trunk interfaces. It can help administrators determine whether the logical aggregation is active and whether expected physical member interfaces are participating correctly. If an aggregated link is not working as intended, the administrator should also verify LACP or manual aggregation mode, member interface status, speed and duplex compatibility, VLAN settings, and configuration consistency on both connected devices. VLAN, ARP, and OSPF commands provide different types of information and do not directly show Eth-Trunk status.

Question 377.

Which protocol is used to synchronize the clocks of network devices?

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

Correct Answer: 1. NTP

Explanation:

Network Time Protocol, or NTP, synchronizes system clocks across routers, switches, servers, and other IP devices. Accurate time is critical for log correlation, security investigations, troubleshooting, authentication, and monitoring. When several devices record the same event, synchronized timestamps make it much easier to reconstruct what happened. DHCP assigns IP settings, ARP performs local IPv4 address resolution, and FTP transfers files. Administrators should also verify the time zone and ensure that devices can reach their configured NTP source.

Question 378.

Which protocol allows a management platform to monitor interface counters and device status?

1. DNS
   2. SNMP
   3. STP
   4. ICMP only

Correct Answer: 2. SNMP

Explanation:

SNMP provides a standardized mechanism for monitoring and managing network devices. A management platform can retrieve values such as interface counters, CPU usage, memory utilization, and operational status from SNMP agents running on routers and switches. Devices can also send traps to report significant events proactively. DNS resolves names, STP prevents Layer 2 loops, and ICMP provides control and diagnostic messages but does not replace SNMP’s structured management model.

Question 379.

Which protocol is preferred over Telnet when remotely administering a Huawei device because it encrypts the session?

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

Correct Answer: 3. SSH

Explanation:

SSH provides encrypted remote command-line administration and is preferred over Telnet for secure device management. It protects credentials, commands, and session output as they travel across the network. Telnet lacks comparable encryption and can expose administrative information to interception. Secure SSH deployments should also use strong authentication, least-privilege accounts, and ACLs that restrict which source networks can reach the management service. FTP and TFTP transfer files, while HTTP is primarily used for web communication.

Question 380.

A Huawei router can ping the next-hop router but cannot reach a remote network. Its local route is correct. What should be checked next?

1. Change the device name
   2. Disable spanning tree
   3. Reboot without further testing
   4. Verify downstream routes, return paths, ACLs, and NAT policies**

Correct Answer: 4. Verify downstream routes, return paths, ACLs, and NAT policies

Explanation:

Successful reachability to the next-hop router confirms that the immediate Layer 3 connection is working, but it does not guarantee end-to-end communication. The next router must have an appropriate route toward the destination, and the destination side must have a valid return path toward the source. ACLs can block traffic even when routing is correct, and NAT configuration may create incorrect or missing translations. A systematic approach should include tracert, routing-table checks on downstream routers, ACL review, NAT-session inspection, and return-path verification. Changing the hostname, disabling STP, or rebooting without evidence would not address the actual forwarding path.