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Huawei H12-821_V1.0 Exam Syllabus Topics:

SectionWeightObjectives
Routing and Traffic Control10%- Routing policy and filtering
- Policy-based routing
- Route import and redistribution
Routing Basics3%- Routing concepts and classification
- Routing table composition and selection rules
OSPF Fundamentals16%- OSPF principles and operation mechanisms
- OSPF configuration and optimization
- OSPF special applications and troubleshooting
Multicast Technologies9%- Multicast basic concepts
- PIM protocol
- IGMP protocol
Network Reliability7%- Device redundancy and link backup
- VRRP protocol
- BFD technology
WLAN Basics2%- WLAN deployment and optimization
- WLAN technology principles
Network Solutions and Design5%- Typical network architecture and solution
- Enterprise network design principles
Ethernet Switching Technologies7%- VLAN principles and configuration
- Spanning Tree Protocol
- Link aggregation and stack technology
BGP Fundamentals17%- BGP route attributes and selection
- BGP characteristics and working principles
- BGP configuration and policy application
Network Security8%- ACL and packet filtering
- AAA authentication
- Attack defense and security policy
Network Service and Management5%- DHCP and DNS services
- Network management and monitoring
IPv6 Technologies3%- IPv6 address structure and configuration
- IPv6 routing protocols
IS-IS Fundamentals8%- IS-IS protocol principles
- IS-IS configuration and deployment

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q89-Q94):

NEW QUESTION # 89
Which of the following parameters are not mandatory items when configuring BGP Peer? (Multiple choice)

Answer: A,B


NEW QUESTION # 90
There are two types of routing entries on a PIM network. (S, G) routing entries are used to set up on a PIM network and are applicable to both PIM-DM and PIM-SM networks.

Answer:

Explanation:
SPT
Explanation:
Routing Entries in PIM
(S, G) entries: Represent the shortest path tree (SPT) from a specific source (S) to a specific multicast group (G). These entries are created after data packets are transmitted directly from the source to the receivers.
(S, G) entries are used in both PIM-DM and PIM-SM modes.
PIM-DM and PIM-SM Modes
InPIM-DM, multicast traffic is initially flooded throughout the network and pruned where no receivers exist.
(S, G) entries represent source-specific paths created after the flooding stage.
InPIM-SM, multicast traffic initially flows through a shared tree, but (S, G) entries are created when the network switches to the SPT for more efficient forwarding.
HCIP-Datacom-Core Reference
The functionality and application of (S, G) routing entries are detailed in multicast and PIM configuration chapters.


NEW QUESTION # 91
In OSPF, the DR and BDR elected in a broadcast network listen to both the 224.0.0.5 address and the 224.0.0.6 address.

Answer: A


NEW QUESTION # 92
Execute the () saved-configuration command to clear the contents of the configuration file used for the next startup of the device, and unspecify the configuration file used for the next startup of the system, thereby restoring the device configuration to the default value.

Answer:

Explanation:
reset


NEW QUESTION # 93
As shown in the figure, R1 imports the direct route10.1.1.0/24to OSPF. An engineer enablesbidirectional route re-advertisementon R2 and R3.

After the network becomes stable, which of the following is thePre (preference) valueof the route10.1.1.0
/24in therouting table of R3?

Answer: B

Explanation:
Let's break it down step by step based on Huawei's routing protocol behavior:
R1imports thedirect route 10.1.1.0/24intoOSPF.
This route is advertised byR1 to R2 and R3viaOSPF.
BothR2 and R3are runningIS-IS, andbidirectional route redistributionis configured between OSPF and IS-IS.
R2 and R3 bothre-advertisethe OSPF-learned route into IS-IS and then potentiallyre-learnit back from the IS- IS domain, causingredistribution loopsunless properly controlled.
Now, the question focuses onR3's routing table:
R3 already learns the routedirectly via OSPFfrom R1.
It also learns the same route again viaIS-ISfrom R2 (looped back due to bidirectional redistribution).
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"OSPF ASE routes are assigned a default preference of 150. If a route is redistributed from another protocol (like IS-IS) into OSPF, and then re-learned, it is considered an ASE route."(Chapter: OSPF Advanced Features - Section: Route Redistribution Behavior)


NEW QUESTION # 94
......

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