Key details for this exam, checked against the published exam outline
Each question shows the correct answer and an explanation of why it is right
On a network, each router has a local core routing table and protocol routing tables. A routing entry in the local core routing table has multiple key fields. Which of the following are included?
Comprehensive and Detailed Step-by-Step
Routing Table Structure:
Routers maintain a local core routing table and separate protocol routing tables for OSPF, BGP, etc.
The local core routing table stores optimal routes selected based on metrics, protocol preferences, and administrative distances.
Fields in the Core Routing Table:
Destination Address (A): Indicates the destination network or host.
Routing Protocol Preference (B): Determines the priority of routing protocols (e.g., OSPF > RIP).
Routing Protocol (D): Specifies the protocol (e.g., OSPF, BGP) that contributed the route.
Inbound Interface: This is stored in the protocol-specific routing table but not in the local core table.
HCIA-Datacom Study Guide, Chapter: Routing Table Management
Huawei Routing Fundamentals
This configuration is part of RTA configuration. Which of the following statements regarding the configuration are true?
[RTA] ospf 100
[RTA-ospf-100]silent-interface GigabitEthernet 1/0/0
The silent-interface command disables the sending of OSPF packets, including Hello packets, on the specified interface, which prevents the establishment of OSPF neighbor relationships. However, the interface can still advertise directly connected routes through other interfaces, making Option C incorrect .
Which of the following attributes must be carried when BGP sends route update messages?
Mandatory BGP Attributes
Next_Hop: Specifies the next hop to reach the destination.
AS_Path: Lists the autonomous systems traversed, crucial for loop prevention and route selection.
Optional Attributes
MED (Multi-Exit Discriminator) and Local_Preference are optional attributes that aid in route preference but are not mandatory.
HCIP-Datacom-Core Reference
BGP attribute behavior and classifications are detailed in BGP path selection principles.
In VRRP networking, if VRRP is not configured to track an uplink interface and the uplink interface or link of the master device in a VRRP group fails, no switchover will be triggered. As a result, a traffic blackhole occurs.
If VRRP is not configured to track uplink interfaces, a failure in the master device's uplink or link will not trigger a switchover, resulting in a traffic blackhole. The VRRP mechanism relies on interface tracking to monitor connectivity and ensure role transitions upon faults. Without this configuration, no failover occurs, and traffic directed toward the master device is lost .
Preferences of routing protocols determine the sequence In which a router selects a route among routes to the same destination /earned through different routing protocols.
The preference of routing protocols determines the selection order of routes when a router receives multiple routes to the same destination from different routing protocols. For instance, OSPF has a higher preference over RIP, so OSPF routes will be selected first. Huawei routing preferences confirm this behavior .
219 questions covering all exam domains, starting from $20
5 domains from the Huawei H12-821_V1.0 exam outline, with approximate weightings. Every sample question above is tagged with the domain it comes from
This domain explores core concepts in data communication, tailored for network engineers. It provides a strong basis for comprehending network operations by covering network models, data transmission principles, and different network topologies.
This section explores several routing protocols, their configuration, and troubleshooting techniques, with an emphasis on network engineers. It provides a thorough understanding of network routing processes by covering both external gateway protocols (EGPs) like BGP and internal gateway protocols (IGPs) like OSPF and RIP.
This section, intended for network engineers, looks at switching fundamentals, such as how to build VLANs and use Spanning Tree Protocol (STP). It offers understanding of the fundamental technologies that facilitate effective data transport in local area networks.
Sample question from this domain above: Q4
Focusing on network engineers, this section explores essential network security concepts. It covers firewall implementation, virtual private network (VPN) setup, and the configuration of access control lists (ACLs), equipping engineers with the knowledge to secure network infrastructures.
This section, which is essential reading for network engineers, covers typical network problems, troubleshooting approaches, and performance optimization strategies. It attempts to improve engineers' ability to solve problems to maintain and improve network operations.
Common questions about the exam itself
