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Huawei H12-821_V1.0 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Routing and Traffic Control | 10% | - Routing policy and filtering - Policy-based routing - Route import and redistribution |
| Network Reliability | 7% | - Device redundancy and link backup - BFD technology - VRRP protocol |
| Network Service and Management | 5% | - Network management and monitoring - DHCP and DNS services |
| Ethernet Switching Technologies | 7% | - Link aggregation and stack technology - VLAN principles and configuration - Spanning Tree Protocol |
| Routing Basics | 3% | - Routing table composition and selection rules - Routing concepts and classification |
| Multicast Technologies | 9% | - PIM protocol - Multicast basic concepts - IGMP protocol |
| BGP Fundamentals | 17% | - BGP configuration and policy application - BGP characteristics and working principles - BGP route attributes and selection |
| IPv6 Technologies | 3% | - IPv6 address structure and configuration - IPv6 routing protocols |
| OSPF Fundamentals | 16% | - OSPF configuration and optimization - OSPF special applications and troubleshooting - OSPF principles and operation mechanisms |
| Network Security | 8% | - AAA authentication - Attack defense and security policy - ACL and packet filtering |
| IS-IS Fundamentals | 8% | - IS-IS configuration and deployment - IS-IS protocol principles |
| WLAN Basics | 2% | - WLAN deployment and optimization - WLAN technology principles |
| Network Solutions and Design | 5% | - Enterprise network design principles - Typical network architecture and solution |
Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions:
An edge port is a new port role added to RSTP to overcome the disadvantages of STP. Which of the following statements is false about this port role?
- A. After receiving a configuration BPDU, the port is still in the Forwarding state.
- B. The Up and Down states of the port do not cause network topology changes.
- C. The port does not participate in RSTP calculation.
- D. The port can directly enter the Forwarding state from the Discarding state.
Correct Answer: A 🗳️
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During BGP route summarization configuration, the keyword can be used to suppress all specific routes so that only the summary route is advertised. The summary route carries the Atomic-aggregate attribute rather than the community attributes of specific routes.
Reveal Solution Discussion 0Correct Answer:
suppress-spec-map
Explanation:
Understanding BGP Route Summarization:
In Border Gateway Protocol (BGP), route summarization is a technique used to aggregate multiple specific prefixes into a broader summary prefix. This reduces the size of routing tables and improves routing efficiency.
Summarization helps to hide unnecessary details from other parts of the network while still maintaining connectivity.
HCIP-Datacom-Core Technology Training Material (BGP Route Summarization).
Suppressing Specific Routes:
When summarizing routes, the suppress-spec-map keyword is used to suppress specific prefixes so that only the summarized route is advertised.
The suppressed routes are not advertised to BGP peers; instead, only the summary route is propagated.
Reference: HCIP-Datacom Advanced Routing & Switching Technology (BGP Attributes and Summarization Techniques).
Atomic-Aggregate Attribute:
The summary route generated during BGP route summarization carries the Atomic-aggregate attribute. This attribute indicates that the summary route might not provide the exact path information available in the original specific routes.
Additionally, when using the suppress-spec-map option, the specific routes' attributes, such as community attributes, are not included in the summary route.
Reference: HCIP-Datacom-Core Technology Training Material (BGP Path Attributes).
Conclusion:
The suppress-spec-map keyword is used to suppress specific routes when performing BGP summarization.
The summarized route includes the Atomic-aggregate attribute but does not carry community attributes from the suppressed routes.
A local router runs IS-IS and its command output is shown in the following figure. Which of the following statements is true?
- A. S4/0/0 sends IIH packets at the interval of 30s.
- B. The cost of S4/0/0 is 20.
- C. The circuit level of S4/0/0 is Level-1.
- D. S4/0/0 supports IPv6.
Correct Answer: B 🗳️
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Security policy is the core feature of firewalls. Only valid traffic that complies with security policies can be forwarded by firewalls. Which of the following statements are true about security policy matching rules?
- A. Multiple values can be configured for a single matching condition, and the values are logically ANDed.
- B. The system has a default security policy named default, where all matching conditions are any and the default action is permit.
- C. If a security policy contains multiple matching conditions, the relationship between them is AND.
- D. When multiple security policy rules are configured, they are sorted in a list by configuration sequence by default. A security policy rule configured earlier is placed higher in the list and has a higher priority.
Correct Answer: C,D 🗳️
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OSPF routers exchange Hello packets to establish neighbor relationships. The Hello packet sending modes vary by network type. On which of the following types of networks are Hello packets multicast?
- A. Broadcast
- B. P2P
- C. P2MP
- D. NBMA
Correct Answer: A,B 🗳️
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