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| Section | Weight | Objectives |
|---|---|---|
| MPLS Technologies | 19% | - MPLS VPN (L3VPN, L2VPN) - MPLS fundamentals and label distribution - MPLS OAM and protection - LDP and RSVP-TE protocols |
| Advanced BGP Features | 10% | - BGP multi-homing and load balancing - BGP route selection and attributes - Route reflectors and confederations - Routing policies and filtering |
| Advanced IGP Features | 17% | - IS-IS advanced features
|
| Network O&M | 7% | - Log and alarm management - Configuration management and backup - Routine maintenance procedures - Network monitoring and performance analysis |
| Network Troubleshooting | 10% | - Switching and link fault handling - Routing protocol fault diagnosis - Performance and service fault resolution - Structured troubleshooting methodology |
| IPv6 Routing | 20% | - IPv6 address planning and configuration - OSPFv3 and IS-IS for IPv6 - Transition mechanisms (dual-stack, tunnel, translation) - BGP4+ for IPv6 |
| Network Cutover | 7% | - Cutover planning and risk assessment - Pre-cutover verification - Post-cutover validation - Implementation and rollback strategy |
| Advanced Ethernet Technologies | 10% | - QinQ and VLAN mapping - Ethernet link aggregation and reliability - VLAN aggregation and MUX VLAN - Port isolation and security features |
インターネット上の他の同様の教育プラットフォームとは異なり、H12-831_V1.0ガイドトレントは過去に高いヒット率を持ち、H12-831_V1.0テストトレントを使用する学生の学習データによると、これらの学生の99％が合格できます。資格テストと憧れの資格を取得すると、H12-831_V1.0学習ツールによって提供される情報がすべての重要なポイントに完全に適合し、一連のパターンと問題解決関連ルーチンを対象としたトレーニングを受講者に提供し、同様のトピック。
質問 # 17
In the networking shown in the figure, R1 and R2 cannot establish an EBGP neighbor relationship through the directly connected interface. The network engineer first checked the BGP-related configurations of R1 and R2, and determined that the reason why R1 and R2 cannot establish an EBGP neighbor relationship is that the Router ID and the interface IP address are inconsistent.
正解：B
質問 # 18
An administrator runs the display mpls lsp command to view LSPs on a device. The command output is shown in the figure.
Which of the following statements is true ?
Options:
正解：B
解説：
Comprehensive and Detailed In-Depth Explanation:
1. Understanding MPLS Label Forwarding Information
The output of the display mpls lsp command shows the Label Forwarding Information Base (LFIB) used by the router to forward MPLS packets.
Each entry consists of:
* FEC (Forwarding Equivalence Class): The destination IP prefix.
* In Label / Out Label: Incoming label (received) and outgoing label (sent).
* In IF / Out IF: Incoming and outgoing interfaces.
2. Analyzing the Given LSP Table
FEC (Destination IP)
In Label
Out Label
Outgoing Interface
1.1.1.1/32
3
NULL
-
2.2.2.2/32
NULL
3
GE0/0/1
2.2.2.2/32
1026
3
GE0/0/1
3.3.3.3/32
NULL
1027
GE0/0/1
3.3.3.3/32
1027
1027
GE0/0/1
Key Observations:
* NULL means the label is removed (Penultimate Hop Popping - PHP).
* Label 3 is the implicit null label, meaning the label is removed before sending to the next router.
* For destination 3.3.3.3, the router adds label 1027 before forwarding it to GE0/0/1.
3. Evaluating Each Answer Option
* Option A: " Before forwarding a packet destined for 2.2.2.2, the device adds label 3 to the packet.
" # Incorrect.
* The output shows that packets destined for 2.2.2.2 have the NULL (label 3) entry , which means the label is removed before forwarding, not added.
* Option B: " Before forwarding a packet destined for 1.1.1.1, the device adds label 3 to the packet.
" # Incorrect.
* The entry 1.1.1.1 # 3/NULL means the label is removed (PHP) , so the device does not add label 3.
* Option C: " Before forwarding a packet destined for any IP address, the device removes labels from the packet. " # Incorrect.
* The device removes labels only for some destinations (e.g., 1.1.1.1 and 2.2.2.2), but it adds label 1027 for 3.3.3.3 .
* Not all IPs have their labels removed.
* Option D: " Before forwarding a packet destined for 3.3.3.3, the device adds label 1027 to the packet. " # Correct.
* The entry 3.3.3.3 # NULL/1027 means that the router adds label 1027 before forwarding packets to GE0/0/1 .
Final answer:
D: (Before forwarding a packet destined for 3.3.3.3, the device adds label 1027 to the packet).
HCIP-Datacom-Advanced Routing & Switching Technology References:
* Understanding MPLS LDP (Label Distribution Protocol) and LFIB
* Implicit Null (Label 3) and Penultimate Hop Popping (PHP)
* MPLS Label Swapping and Forwarding Process
質問 # 19
When a fault occurs, the fault can be classified to reduce the scope of fault location. Which of the following is not an interface configuration fault?
正解：D
質問 # 20
On the network shown in the figure, single-hop BFD is configured on R1 and R2. A network engineer finds that the BFD session goes down. To locate the fault, the network engineer queries the BFD configurations on R1 and R2. According to the configuration information marked in the figure, it can be determined that the mismatched time parameter settings on R1 and R2 causes the BFD session to go down.
正解：A
解説：
# Configuration Snapshot:
On R1:
bash
CopyEdit
bfd toR2 bind peer-ip 10.0.12.2
discriminator local 1
discriminator remote 2
min-tx-interval 1500
min-rx-interval 1500
On R2:
bash
CopyEdit
bfd toR1 bind peer-ip 10.0.12.1
discriminator local 2
discriminator remote 1
# Observation:
* On R1 , both min-tx-interval and min-rx-interval are configured: 1500ms
* On R2 , no timing parameters are explicitly set (defaults are used)
# BFD Timing Behavior (Huawei):
* BFD is bidirectional and can work even if only one side configures the timers .
* As long as the peer can handle the intervals (i.e. doesn't violate capabilities), the session should still come up .
* This is not a mismatch fault . It ' s valid to set time parameters only on one side.
# Therefore, the time parameter mismatch is NOT the reason the session goes down.
# Final answer: B. FALSE
Root Cause (Likely):
* The real cause might be something else (e.g., interface down, ACL blocking BFD packets, wrong IP, or unidirectional loss).
* But not mismatched timers - they are allowed.
Official Huawei Extract:
" If only one end of the BFD session specifies the detection intervals, the BFD session can still be established. Huawei devices accept remote minimum intervals and negotiate accordingly. "
- [Huawei HCIA-Datacom Certification Guide - BFD Session Configuration and Troubleshooting]
質問 # 21
Display interface GE0/0/0 once, and find that the Total Eror count (the total number of error packets on the physical layer of the interface) is not 0. At this point, it can be concluded that the current fault has not disappeared.
正解：B
質問 # 22
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無料でクラウドストレージから最新のJpshiken H12-831_V1.0 PDFダンプをダウンロードする：https://drive.google.com/open?id=1d8m0j9APSBGomQ5iJbH6oYvaR5zv2sy8