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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Multicast | 9% | - IGMP and PIM concepts |
| Topic 2: Routing Fundamentals | 3% | - Network basics and routing principles |
| Topic 3: Network Reliability | 8% | - Redundancy and failover mechanisms |
| Topic 4: IS-IS | 8% | - IS-IS protocol fundamentals |
| Topic 5: OSPF | 16% | - OSPF core concepts - OSPF areas and LSDB |
| Topic 6: Network Service and Management | 2% | - Network management basics |
| Topic 7: BGP | 17% | - BGP policy and attributes - BGP path selection |
| Topic 8: Switching Technologies | 7% | - VLAN and STP fundamentals |
| Topic 9: Network Security | 9% | - ACL and basic security mechanisms |
| Topic 10: IPv6 | 3% | - IPv6 addressing and routing |
| Topic 11: Large-scale WLAN Architecture | 6% | - Enterprise WLAN deployment basics |
| Topic 12: Network Solution | 2% | - Integrated network design scenarios |
| Topic 13: Routing and Traffic Control | 10% | - Policy-based routing - Traffic engineering basics |
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NEW QUESTION # 368
During routine O&M, an engineer finds that theHold Timeparameters of two devices are inconsistent. In this case, which of the following situations occurs?
Answer: B
Explanation:
In BGP and other TCP-based protocols like OSPF and IS-IS, when devices havedifferent Hold Times, thesmaller value is chosenafter negotiation. This ensuresfaster detectionof communication loss.
The Keepalive and Hold Timers are negotiated during the establishment of a BGP session.
The smaller Hold Timeis used to maintain symmetry and prevent timeouts.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"When negotiating Hold Time, both ends agree to use the smaller of the two values. This value is used to detect failures faster." (Chapter: BGP Fundamentals - Section: BGP Session Establishment)
NEW QUESTION # 369
On an office network of an enterprise, OSPF is enabled on two directly connected routers. During adjacency establishment, the state machine stays in the 2-way state. Which of the following statements are not possible causes?
Answer: C,D
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
OSPF State Machine:
OSPF adjacency progresses through several states:Down > Init > 2-Way > ExStart > Exchange > Loading > Full.
The2-Way stateindicates that routers have exchanged Hello packets but are not forming full adjacencies.
Possible Causes for Staying in the 2-Way State:
Hello Time Values Are Different (A):Mismatched Hello/Dead intervals prevent adjacency establishment.
Area IDs Are Different (B):OSPF routers must belong to the same area to establish adjacency.
Router IDs Conflict (C):While Router ID conflicts cause other issues, they do not result in the 2-Way state.
N-bit and E-bit Are the Same (D):Matching N-bit/E-bit values are normal and do not cause problems.
References:
HCIA-Datacom Study Guide, Chapter: OSPF Adjacency Establishment
Huawei OSPF Neighbor State Analysis
NEW QUESTION # 370
As shown in the figure, R1 imports the direct route 10.1.1.0/24 to OSPF. An engineer enables bidirectional route re-advertisement on R2 and R3.
After the network becomes stable, which of the following is the Pre (preference) value of the route 10.1.1.0
/24 in the routing table of R3?
Answer: C
Explanation:
Let's break it down step by step based on Huawei's routing protocol behavior:
* R1 imports the direct route 10.1.1.0/24 into OSPF.
* This route is advertised by R1 to R2 and R3 via OSPF.
* Both R2 and R3 are running IS-IS, and bidirectional route redistribution is configured between OSPF and IS-IS.
* R2 and R3 both re-advertise the OSPF-learned route into IS-IS and then potentially re-learn it back from the IS-IS domain, causing redistribution loops unless properly controlled.
* Now, the question focuses on R3's routing table:
* R3 already learns the route directly via OSPF from R1.
* It also learns the same route again via IS-IS from 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 # 371
There are many ways to establish clusters on modular switches. What methods does Huawei modular switches support to establish clusters? (Multiple choice)
Answer: A,C,D
NEW QUESTION # 372
Which of the following parameters are not mandatory items when configuring BGP Peer? (Multiple choice)
Answer: A,C
NEW QUESTION # 373
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