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Huawei H12-831_V1.0 (HCIP-Datacom-Advanced Routing & Switching Technology V1.0) certification exam is a highly sought-after certification for IT professionals looking to validate their skills and knowledge in advanced routing and switching technology. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification exam is designed to test the candidate's proficiency in configuring and troubleshooting complex network scenarios, implementing advanced routing protocols, and designing network solutions using Huawei technology.
Huawei H12-831_V1.0 Exam consists of multiple-choice questions and simulation questions. H12-831_V1.0 exam is conducted online, and candidates have 90 minutes to complete it. To pass the exam, candidates must score at least 600 out of a possible 1000 points.
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Huawei H12-831_V1.0 Certification Exam is a computer-based exam that consists of 60 multiple-choice questions. H12-831_V1.0 exam is administered by Pearson VUE, a leading provider of computer-based testing services. Candidates have 90 minutes to complete the exam and must achieve a passing score of at least 60% to receive the certification.
NEW QUESTION # 124
In the figure, packets are forwarded based on MPLS on the network .
When PE2 receives a packet from P2 , what is the label value carried in the packet?
Options:
Answer: C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding MPLS Label Switching
MPLS (Multiprotocol Label Switching) operates by adding labels to packets to enable fast switching across an MPLS domain.
* Labels are swapped at each router (LSR - Label Switch Router) based on the LFIB (Label Forwarding Information Base).
* When an MPLS packet reaches a router, it checks the incoming label and swaps it with an outgoing label as per its label forwarding table.
* The label value " 3 " is the implicit null label , which is used for PHP (Penultimate Hop Popping) .
2. Analyzing the MPLS Label Flow in the Figure
* At PE1 : The packet enters the MPLS domain and is labeled with 1033 .
* At P1 : P1 forwards the packet based on label 1033 .
* At P2 :
* P2 receives label 1033 and swaps it with label 3 (as per the figure).
* Label 3 (implicit null) means that the label is removed before reaching PE2 (PHP - Penultimate Hop Popping).
* This ensures that PE2 receives a pure IP packet without an MPLS label .
3. Evaluating Each Answer Option
* Option A: " The label value is 3. " # Incorrect.
* Label 3 (implicit null) is not actually sent to PE2.
* Instead, P2 removes the label before sending the packet to PE2 .
* Option B: " There is no label. " # Correct.
* Since P2 performs PHP (Penultimate Hop Popping) , the label is removed , and PE2 receives only an IP packet .
* Option C: " The label value is 1033. " # Incorrect.
* Label 1033 was used earlier in the MPLS path but was swapped out before reaching PE2.
* Option D: " The label values are 3 and 1033. " # Incorrect.
* Only one label is present at a time.
* Label 1033 was swapped for label 3 , but label 3 was removed before reaching PE2 .
Final answer:
B: (There is no label).
HCIP-Datacom-Advanced Routing & Switching Technology References:
* MPLS Label Forwarding Mechanism
* Penultimate Hop Popping (PHP) and Implicit Null Label (3)
* MPLS Label Swapping and Label Forwarding Table (LFIB)
NEW QUESTION # 125
In a certain MPLS network, the LSP information of R1 and R3 is shown in the figure. At this time, the administrator enters the command ping -a 1.1.1.1 3.3.3.3 on R1. Which of the following descriptions of this scenario is correct?
Answer: B
NEW QUESTION # 126
As shown in the figure, MPLS LSP is set up in the network, and the goal is to establish an LDP session between SWA and SWB.
Answer: B
NEW QUESTION # 127
Ethernet is a network that supports broadcasting. Once there is a loop in the network, this simple broadcasting mechanism will cause catastrophic consequences.
Which of the following phenomena may be caused by loops? (Multiple choice)
Answer: A,B,C,D
NEW QUESTION # 128
Fill in Blanks
The configuration shown is performed on R2 to filter all incoming routes. Suppose there is a BGP route with the AS_Path attribute of [100200300400] on R1 that needs to be sent to R2. Please help the network administrator to adjust the AS order in the AS_Path attribute of the route on R1 to ensure that the route entry will not be filtered by the routing policy of R2____, ____, ____, ____.
100 This space corresponds to the [A] space in the routing policy
200 This space corresponds to the [B] space in the routing policy
300 This space corresponds to the [C] space in the routing policy
400 This space corresponds to the [D] space in the routing policy
Answer:
Explanation:
CDAB
NEW QUESTION # 129
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