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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Routing and Traffic Control | 10% | - Traffic engineering basics - Policy-based routing |
| Topic 2: IPv6 | 3% | - IPv6 addressing and routing |
| Topic 3: Switching Technologies | 7% | - VLAN and STP fundamentals |
| Topic 4: Network Reliability | 8% | - Redundancy and failover mechanisms |
| Topic 5: Large-scale WLAN Architecture | 6% | - Enterprise WLAN deployment basics |
| Topic 6: Network Service and Management | 2% | - Network management basics |
| Topic 7: IS-IS | 8% | - IS-IS protocol fundamentals |
| Topic 8: BGP | 17% | - BGP policy and attributes - BGP path selection |
| Topic 9: Network Solution | 2% | - Integrated network design scenarios |
| Topic 10: Network Security | 9% | - ACL and basic security mechanisms |
| Topic 11: Multicast | 9% | - IGMP and PIM concepts |
| Topic 12: OSPF | 16% | - OSPF areas and LSDB - OSPF core concepts |
| Topic 13: Routing Fundamentals | 3% | - Network basics and routing principles |
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問題 #398
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 ?
答案：A
解題說明：
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)
問題 #399
As shown in the figure, RTA, RTB, RTC, and RTD are in the same AS and establish IBGP neighbor relationships through direct links. RTB and RTC are route reflectors, and RTA and RTC are route reflector clients of RTB. RTB and RTD are route reflector clients of RTC. RTA announces 10.1.1.0/24 into BGP. Then the Originator ID value of the BGP route update received on RTD is ()
答案：
解題說明：
1.1.1.1
問題 #400
ACLs are a common matching tool in routing policies. An ACL can be configured on a router to match routes.
答案：B
解題說明：
ACL in Routing Policies
ACLs are frequently used in routing policies to match specific routes based on criteria such as source IP, destination IP, and more. This allows ACLs to influence route redistribution, filtering, and forwarding decisions.
問題 #401
BGP is generally applied to complex networks where routes change frequently. Frequent route flapping consumes a large number of bandwidth and CPU resources, and even affects the normal operation of the network. This is an unavoidable problem that cannot be solved in BGP.
答案：A
解題說明：
BGP Route Flapping and Mitigation
While route flapping is a concern in large-scale networks, BGP employs mechanisms such as Route Dampening to mitigate its impact. Route dampening suppresses frequently flapping routes for a period of time to reduce resource consumption and network instability. Therefore, it is incorrect to state that the issue cannot be resolved in BGP.
問題 #402
On an OSPF network, different device roles generate different types of LSAs that vary in function. Which of the following types of LSAs cannot be generated by a pure ASBR?
答案：A,B,C
問題 #403
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