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The H12-831_V1.0 exam is one of the most valuable certification exams. The HCIP-Datacom-Advanced Routing & Switching Technology V1.0 (H12-831_V1.0) certification exam opens a door for beginners or experienced Pass4Leader professionals to enhance in-demand skills and gain knowledge. H12-831_V1.0 exam credential is proof of candidates' expertise and knowledge. After getting success in the HCIP-Datacom-Advanced Routing & Switching Technology V1.0 (H12-831_V1.0) certification exam, candidates can put their careers on the fast route and achieve their goals in a short period of time.
| Section | Objectives |
|---|---|
| Topic 1: Network Design and Troubleshooting | - Enterprise Network Design
|
| Topic 2: IP Network Technologies | - IPv6 Deployment
|
| Topic 3: MPLS and VPN Technologies | - MPLS Fundamentals
|
| Topic 4: Advanced Routing Protocols | - BGP Configuration and Policy Control
|
| Topic 5: Network Services and Optimization | - Multicast Technologies
|
>> Technical H12-831_V1.0 Training <<
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NEW QUESTION # 130
In the network shown in the figure, R1, R2, R4, and R5 run IS-IS in area 49.0001, and R3 and R6 run IS-IS in area 49.0002. Within AS 65000, R1, R3, R4, and R6 establish IBGP neighbor relationships with R2 and R5, of which R2 and R5 are RRs and R1, R4, R3, and R6 are clients.
IBGP neighbor relationships are all established using the Loopback0 interface. The IP address of the Loopback0 interface of each device is 10.0.X.X/32, and the Router ID is 10.0.X.X, where X is the device number. R1 and R4 introduce the external network 192.168.1.0/24 into BGP through import, and R3 and R6 introduce the external network 192.168.2.0/24 into BGP through import.
Which of the following descriptions are correct by default? (Multiple choice)
Answer: B,D
NEW QUESTION # 131
A network engineer draws a schematic diagram of a multicast network (shown in the figure) during troubleshooting. R1 and R2 run IGMP version 2 and use PIM-SM as the multicast routing protocol. The default settings are used for other parameters. Given this, the querier on the multicast network is_____. (Enter the device ID, for example, R1.)
Answer:
Explanation:
R1
Explanation:
IGMPv2 performs an independent querier election on a shared network segment. When multiple multicast routers initially consider themselves queriers, they exchange IGMP General Query messages and compare the source IP addresses of those messages. The multicast router with the lowest interface IP address becomes the IGMP querier.
The relevant addresses are:
* R1: 10.0.12.1/24
* R2: 10.0.12.2/24
Because 10.0.12.1 is numerically lower than 10.0.12.2, R1 is elected as the IGMP querier . R2 becomes a non-querier and stops periodically transmitting General Query messages while it continues receiving valid queries from R1.
PIM-SM does not change this result. PIM designated-router election and IGMP querier election are separate processes and may select different routers. The question specifically asks for the IGMP querier; therefore, the IGMPv2 lowest-IP rule applies. Huawei IGMPv2 working mechanism .
NEW QUESTION # 132
An engineer uses two routers to test IPv6 services, and simulates the headquarters and branches by running BGP4+ of interconnection. As shown in the figure, an engineer captures packets to view the update packets sent by R1. About this message Description of information, which of the following statements is correct
Answer: B
NEW QUESTION # 133
MPLS determines the upstream and downstream relationships based on the data forwarding direction.
MPLS labeled packets are sent from upstream LSRs and received and processed by downstream LSRs.
Similarly, MPLS labels are distributed from upstream LSRs to downstream LSRs one by one.
Answer: A
Explanation:
This statement is false due to an incorrect description of how MPLS label distribution works .
* # Upstream/Downstream Relationship: In MPLS, the upstream LSR is the one sending data toward the destination , and the downstream LSR is the one closer to the destination .
* # Incorrect Claim: The statement says " labels are distributed from upstream to downstream " , which is wrong .
# Correct behavior: Labels are distributed from downstream to upstream .
Each LSR advertises a label to its upstream neighbor for a specific FEC (Forwarding Equivalence Class).
This is how Label Distribution Protocol (LDP) works.
# Official Reference from Huawei:
" MPLS labels are distributed from the downstream LSR to the upstream LSR. Data is forwarded from the upstream to the downstream, but labels flow in the opposite direction. "
- [Huawei HCIA-Datacom Guide - MPLS Chapter]
NEW QUESTION # 134
On the OSPF network shown in the figure:
* Area 1 is a common area.
* Area 2 is a totally NSSA (Not-So-Stubby Area).
* Area 3 is an NSSA.
* R5 imports the external route 10.0.5.5/32 into OSPF.
Which of the following routers have the route 10.0.5.5/32 in their routing tables?
Answer: A,C,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding OSPF Areas and Route Propagation in the Network:
* OSPF Area Types in the Question:
* Area 0 (Backbone Area): Connects all areas and distributes routing information.
* Area 1 (Standard Area): Regular OSPF area that can receive and forward external routes.
* Area 2 (Totally NSSA - Totally Not-So-Stubby Area):
* Does not allow external routes except for a default route injected by the ABR.
* Area 3 (NSSA - Not-So-Stubby Area):
* Allows external routes as Type 7 LSAs but does not accept Type 5 LSAs.
* How External Routes Are Advertised in This Scenario:
* R5 (in Area 3) imports 10.0.5.5/32 as an external route into OSPF.
* Since Area 3 is an NSSA, the external route is advertised as a Type 7 LSA (not Type 5).
* The ABR (R1) converts the Type 7 LSA into a Type 5 LSA and advertises it into Area 0.
* Once in Area 0, this Type 5 LSA can be distributed to other areas except totally stubby or totally NSSA areas.
Route Distribution Analysis:
* R5 (Area 3) # R1 (Area 0, ABR):
* R5 generates a Type 7 LSA for 10.0.5.5/32.
* R1 (ABR) converts this Type 7 LSA into a Type 5 LSA and injects it into Area 0.
* R2 (Area 0) # R3 (Area 0):
* Since Area 0 allows external Type 5 LSAs, R2 and R3 receive 10.0.5.5/32.# R2 and R3 have the route.
* R6 (Area 1) # Connected to Area 0:
* Area 1 is a common area, meaning it can receive external Type 5 LSAs.# R6 has the route.
* R4 (Area 2 - Totally NSSA):
* Totally NSSA areas do NOT accept Type 5 or Type 7 LSAs.
* Instead, they receive only a default route from the ABR (R3).
* Since R4 does not receive external routes explicitly, it does NOT have 10.0.5.5/32.# R4 does NOT have the route.
Final Conclusion:
* # R2, R3, and R6 have the route 10.0.5.5/32.
* # R4 does not have the route because Area 2 is a Totally NSSA and only gets a default route.
Thus, the correct answer is:# R2, R3, and R6 have the route 10.0.5.5/32 in their routing tables.
NEW QUESTION # 135
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