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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: BGP Fundamentals | 17% | - BGP characteristics and working principles - BGP route attributes and selection - BGP configuration and policy application |
| Topic 2: IS-IS Fundamentals | 8% | - IS-IS protocol principles - IS-IS configuration and deployment |
| Topic 3: Ethernet Switching Technologies | 7% | - Link aggregation and stack technology - VLAN principles and configuration - Spanning Tree Protocol |
| Topic 4: Network Service and Management | 5% | - DHCP and DNS services - Network management and monitoring |
| Topic 5: Network Solutions and Design | 5% | - Enterprise network design principles - Typical network architecture and solution |
| Topic 6: Multicast Technologies | 9% | - Multicast basic concepts - PIM protocol - IGMP protocol |
| Topic 7: Network Security | 8% | - AAA authentication - Attack defense and security policy - ACL and packet filtering |
| Topic 8: WLAN Basics | 2% | - WLAN technology principles - WLAN deployment and optimization |
| Topic 9: Routing Basics | 3% | - Routing concepts and classification - Routing table composition and selection rules |
| Topic 10: Routing and Traffic Control | 10% | - Routing policy and filtering - Policy-based routing - Route import and redistribution |
| Topic 11: Network Reliability | 7% | - BFD technology - VRRP protocol - Device redundancy and link backup |
| Topic 12: IPv6 Technologies | 3% | - IPv6 address structure and configuration - IPv6 routing protocols |
| Topic 13: OSPF Fundamentals | 16% | - OSPF special applications and troubleshooting - OSPF principles and operation mechanisms - OSPF configuration and optimization |
>> Original H12-821_V1.0 Questions <<
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NEW QUESTION # 389
Which of the following is the configuration command for linkage between VRRP and BFD?
Answer: A
NEW QUESTION # 390
When deploying BFD, you need to adjust some parameters so that it can better detect the network status.
Which of the following statements is false about BFD optimization?
Answer: C
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
1. Overview of BFD Optimization:
* BFD (Bidirectional Forwarding Detection) is a protocol that provides rapid detection of link failures.
* Optimizing BFD involves adjusting parameters to balance between detection speed and network stability.
2. Analysis of Each Statement:
Option A: After a high priority is configured for BFD packets, BFD packets are preferentially forwarded.
* Correct (True Statement).
* High priority ensures that BFD packets are not delayed or dropped under congestion, improving detection accuracy.
Option B: To quickly learn about the network status and performance requirements, you can set the interval for sending BFD packets to the minimum value.
* Incorrect (False Statement).
* Setting the interval to the minimum value can lead to excessive BFD session flapping, which may overload the network or cause instability. The interval should be configured based on network requirements and conditions, rather than set to the minimum.
Option C: On a live network, some devices switch traffic only when a BFD session changes to the Up state... configure a delay to compensate for the time difference.
* Correct (True Statement).
* This is a valid optimization to avoid issues caused by timing mismatches between BFD and routing protocols.
Option D: If a BFD session flaps, master/backup switchovers are frequently performed... set the WTR time.
* Correct (True Statement).
* The WTR (Wait to Restore) timer helps stabilize BFD by delaying session recovery after a flap, reducing the risk of frequent switchovers.
3. Summary:
* The false statement is B, as setting the BFD packet interval to the minimum can destabilize the network.
NEW QUESTION # 391
OSPF's Stub area and Totally Stub area solve the problem caused by maintaining an excessively large LSDB in the end area, but for some specific scenarios, they are not the best solution.
Answer: A
NEW QUESTION # 392
Which of the following address types is not supported by IPv4?
Answer: A
NEW QUESTION # 393
The administrator received the following requirements to design ip as-path-filter. It needs to be realized that the company headquarters (AS 65001) can accept the route originating from the branch office (AS 65Q10), and the route must pass through AS65002, then please the following configurations and sequences match.
Answer:
Explanation:
NEW QUESTION # 394
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