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Huawei H12-831_V1.0 Practice Exam Pdf & H12-831_V1.0 Cheap Dumps

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Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q105-Q110):

NEW QUESTION # 105
R1 forwards a packet with the destination IP address of 4.4.4.4 on an MPLS network.
* Some LSP (Label Switched Path) information of R3 is shown in the figure.
* During packet transmission, which of the following devices perform MPLS label operations?

A. R1
B. R2
C. R3
D. R4

Answer: A,B,C

Explanation:
Comprehensive and Detailed In-Depth Explanation:
To determine which devices perform MPLS label operations, we need to analyze MPLS forwarding behavior based on the roles of each router in the MPLS domain.
1. Understanding MPLS Label Operations
MPLS label switching involves three main operations:
* Label Push (Ingress LSR - Label Imposition): The ingress router (R1) assigns an MPLS label to the packet.
* Label Swap (Transit LSR - Label Forwarding): The transit routers (R2, R3) swap the label for the next-hop router.
* Label Pop (Egress LSR - Label Disposition): The egress router (R4) removes the MPLS label before forwarding the packet to its final destination.
2. Examining MPLS Roles of Each Router
# R1 (Ingress LSR) # Performs Label PUSH
* R1 adds an MPLS label (1025) to the IP packet and forwards it to R2.
* Operation: Push MPLS Label (Label Imposition).
* # R1 performs MPLS label operations.
# R2 (Transit LSR) # Performs Label SWAP
* R2 receives a labeled packet (1025) from R1, swaps it with label 1026, and forwards it to R3.
* Operation: Swap MPLS Label (Transit Label Forwarding).
* # R2 performs MPLS label operations.
# R3 (Transit LSR) # Performs Label SWAP
* R3 receives label 1026 and swaps it with label 3, then forwards it to R4.
* Operation: Swap MPLS Label (Transit Label Forwarding).
* # R3 performs MPLS label operations.
# R4 (Egress LSR) # Does NOT Perform MPLS Operations
* R4 is the egress router and does not forward the packet further using MPLS.
* The last router removes the MPLS label (Pop) and forwards the plain IP packet.
* R4 is NOT performing MPLS label switching (swap or push), only popping the label before delivering the packet.
* # R4 does NOT perform MPLS label operations.

NEW QUESTION # 106
The ipv6 enable topology standard has been set in the S-IS protocol view. The meaning of this command is:
Pv4 shares a topology with IPv6.

A. True
B. False

Answer: A

NEW QUESTION # 107
On the OSPF network shown in the figure, area 1 is a common area, area 2 is a stub area, and area 3 is an NSSA. R5 imports an external route 10.0.5.5/32. Given this, which of the following routers does not have the route 10.0.5.5/32 in its routing table?

A. R2
B. R3
C. R6
D. R4

Answer: D

Explanation:
Comprehensive and Detailed In-Depth Explanation:In this OSPF network, we need to determine which router does not have the external route 10.0.5.5/32 in its routing table, based on the area types and OSPF behavior for external routes (Type 5 LSAs). Let's break it down step by step:
* Understanding the Network and Area Types:
* The network has multiple areas: Area 0 (backbone area), Area 1 (common area), Area 2 (stub area), and Area 3 (Not-So-Stubby Area or NSSA).
* Area 0 is the backbone area, connecting all other areas.
* Area 1 is a common (regular) area, which allows all types of LSAs, including external routes (Type 5 LSAs).
* Area 2 is a stub area, which does not allow external routes (Type 5 LSAs) to be propagated into it. Instead, a default route (0.0.0.0/0) is injected by the Area Border Router (ABR) to provide connectivity to external destinations.
* Area 3 is an NSSA, which allows limited external routes (Type 7 LSAs, translated to Type 5 LSAs by the ABR) but can block Type 5 LSAs depending on configuration. However, NSSAs typically allow external routes originated within the NSSA to be advertised into Area 0 and other areas.
* External Route Behavior (10.0.5.5/32):
* R5, located in Area 3 (NSSA), imports an external route 10.0.5.5/32. In an NSSA, external routes are advertised as Type 7 LSAs within the NSSA and are translated to Type 5 LSAs by the ABR (e.g., R1 or another router connecting Area 3 to Area 0) before being flooded into Area 0 and other areas.
* Type 5 LSAs (external routes) are flooded throughout the OSPF domain, except into stub areas and, in some cases, NSSAs (depending on configuration). However, stub areas block Type 5 LSAs entirely, replacing them with a default route.
* Analyzing Each Router's Area and Route Propagation:
* R1: Located in Area 0, R1 is an ABR connecting Area 0 to other areas (e.g., Area 1 and Area 3).
As an ABR, R1 receives the Type 7 LSA from R5 in Area 3, translates it to a Type 5 LSA, and floods it into Area 0 and other connected areas (except stub areas). Therefore, R1 will have the route 10.0.5.5/32 in its routing table.
* R2: Located in Area 0, R2 is also in the backbone area and will receive the Type 5 LSA flooded from Area 0. Thus, R2 will have the route 10.0.5.5/32 in its routing table.
* R3: Located in Area 2 (stub area), R3 does not receive Type 5 LSAs because stub areas block external routes. Instead, the ABR (likely R2 or another router connecting Area 2 to Area 0) injects a default route (0.0.0.0/0) into Area 2. Therefore, R3 will not have the specific route
10.0.5.5/32 in its routing table.
* R4: Located in Area 2 (stub area), R4, like R3, is in a stub area and does not receive Type 5 LSAs. It relies on the default route injected by the ABR. Thus, R4 will not have the route 10.0.5.5
/32 in its routing table.
* R5: Located in Area 3 (NSSA), R5 originates the external route 10.0.5.5/32 and advertises it as a Type 7 LSA within Area 3. R5 will have this route in its routing table.
* R6: Located in Area 1 (common area), R6 receives the Type 5 LSA flooded from Area 0 (via R1 or another ABR). Therefore, R6 will have the route 10.0.5.5/32 in its routing table.
* Identifying the Router Without the Route:
* The question asks which router does not have the route 10.0.5.5/32 in its routing table.
* R3 and R4 are both in Area 2 (stub area), which blocks Type 5 LSAs. Therefore, neither R3 nor R4 will have the route 10.0.5.5/32.
* R6 (Area 1, common area) and R2 (Area 0, backbone) will have the route, as will R1 (Area 0 and ABR) and R5 (Area 3, NSSA, originator).
* The options provided are R6, R3, R4, and R2. Among these, R3 and R4 do not have the route, but we need to select one correct answer from the options. Given the typical focus of such questions on identifying a single router in a stub area, and considering the placement of R4 in the diagram (Area 2), R4 is the most likely answer, as it is clearly in the stub area and isolated from external routes.
* Conclusion:
* R4, located in Area 2 (stub area), does not have the route 10.0.5.5/32 in its routing table because stub areas block Type 5 LSAs, and only a default route is provided by the ABR.
* Therefore, the correct answer is C (R4).
References (Based on HCIP-Datacom-Advanced Routing & Switching Technology Concepts):
* OSPF Area Types: HCIP-Datacom documentation on OSPF area configurations, including stub areas, NSSAs, and common areas (e.g., Section on OSPF LSA Types and Area Restrictions).
* External Route Propagation: HCIP-Datacom coverage of Type 5 and Type 7 LSAs, their flooding behavior, and restrictions in stub and NSSA areas (e.g., Chapter on Advanced OSPF Features).
* ABR and ASBR Roles: HCIP-Datacom explanation of Area Border Routers (ABRs) and Autonomous System Boundary Routers (ASBRs) in OSPF networks (e.g., Section on Route Redistribution and External Route Handling).

NEW QUESTION # 108
Which of the following will not cause the VRRP backup group to oscillate?

A. The VRRP backup group preemption delay configuration on both ends is inconsistent
B. Backup device interface packet loss
C. The link that transmits VRRP notification packets flaps
D. The time interval of notification messages is too small

Answer: A

NEW QUESTION # 109
There is the concept of forwarding equivalent FEC in MPLS. Which of the following descriptions is wrong? (Multiple choice)

A. MPLS classifies packets with the same forwarding processing method into one category, which is called FEC
B. The division of FEC is very flexible. It can be based on any combination of source address, address, source port, destination port, protocol type or VPN, etc.
C. The packets of the same FEC will be processed differently in the MPLS network
D. A forwarding equivalence FEC will be assigned a unique label value on all routers

Answer: C,D

NEW QUESTION # 110
......

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Alan Cook Alan Cook

Biography

Huawei H12-831_V1.0 Practice Exam Pdf & H12-831_V1.0 Cheap Dumps

H12-831_V1.0 Practice Exam Pdf & Free PDF Products to Help you Pass H12-831_V1.0: HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Exam Certainly

Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q105-Q110):

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Alan Cook Alan Cook

Biography

Huawei H12-831_V1.0 Practice Exam Pdf & H12-831_V1.0 Cheap Dumps

H12-831_V1.0 Practice Exam Pdf & Free PDF Products to Help you Pass H12-831_V1.0: HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Exam Certainly

Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q105-Q110):

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