H12-831_V1.0-ENU問題集 & H12-831_V1.0-ENUトレーリングサンプル

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Huawei H12-831_V1.0-ENU（HCIP-Datacom-Advanced Routing＆Switching Technology V1.0）認定試験は、高度なルーティングとスイッチング技術における専門知識を証明したいプロフェッショナル向けに設計されています。この認定試験は、すでにHCIA-Datacom認定を取得し、スキルをさらに向上させたい個人を対象としています。この試験に合格することは、HCIP-Datacom-Advanced Routing＆Switching Technology V1.0認定を取得するための要件です。

>> H12-831_V1.0-ENU問題集 <<

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Huawei H12-831_V1.0-ENU認定試験は、高度なルーティングおよび切り替え技術における候補者の知識とスキルをテストする厳格な試験です。この認定試験は、候補者が複雑なネットワーキングの問題を処理し、効果的なソリューションを提供するために必要なスキルを備えていることを保証するように設計されています。認定試験では、高度なルーティングプロトコル、スイッチングテクノロジー、ネットワークセキュリティ、ネットワーク設計など、幅広いトピックをカバーしています。

Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 認定 H12-831_V1.0-ENU 試験問題 (Q69-Q74):

質問 # 69
In an MPLS L3VPN deployment, PE routers exchange VPNv4 routes through MP-BGP.
Customer routes are correctly learned from CE devices but are not installed into the correct VRF routing table on the remote PE. Which configuration element is most likely missing?

A. OSPF sham-link
B. VPN instance import/export Route Target configuration
C. LDP enabled on PE
D. BFD for BGP

正解：B

質問 # 70
Which description is correct about the label encapsulation format in MPLS? (Multiple choice)

A. The total length of a single MPLS label is 4 bytes (32 bits)
B. For Ethernet and PPP packets, the label stack is located between the layer 2 header and the data like a "underlay*": when there is a VLAN tag, the MPLS header is placed between the Ethernet header and the VLAN tag
C. The TTL field in the label is similar to the TTL (Time To Live.) in the IP packet, and it also has the effect of preventing loops.
D. The S field in the label: 1 bit, used to identify whether the label is the bottom label of the stack, when the value is 1, it indicates the second-to-last label

正解：A、C

質問 # 71
On the network shown in the figure, the network administrator configures the DHCP snooping trust function on the switch.
* GE0/0/2 is a trusted interface (connected to the DHCP Server).
* GE0/0/3 is an untrusted interface (potential attacker).

Which of the following statements are true about the two interfaces?
Options:

A. When receiving a DHCP request packet on GE0/0/2, the switch forwards the packet through GE0
/0/3.
B. When receiving a DHCP response packet on GE0/0/3, the switch forwards the packet through GE0/0/1.
C. When receiving a DHCP request packet on GE0/0/3, the switch forwards the packet through GE0
/0/2.
D. When receiving a DHCP response packet on GE0/0/2, the switch forwards the packet through GE0/0/1.

正解：C、D

解説：
Comprehensive and Detailed In-Depth Explanation:
1. Understanding DHCP Snooping
DHCP Snooping is a security feature that filters untrusted DHCP messages to prevent attacks such as:
* Rogue DHCP servers distributing incorrect IP addresses.
* DHCP starvation attacks.
In DHCP Snooping, switch ports are classified as:
* Trusted Interfaces: Allow both DHCP requests and DHCP responses to pass through.
* Untrusted Interfaces: Allow only DHCP requests but drop DHCP responses (to prevent rogue DHCP servers).
2. Analyzing Each Answer Option
* Option A: "When receiving a DHCP response packet on GE0/0/2, the switch forwards the packet through GE0/0/1."
* Correct.
* GE0/0/2 is a trusted interface (connected to the DHCP server).
* DHCP responses (ACK, NAK, OFFER) come from the DHCP Server.
* Since DHCP responses are allowed on trusted interfaces, the switch forwards them to the client (PC1) via GE0/0/1.
* Option B: "When receiving a DHCP request packet on GE0/0/2, the switch forwards the packet through GE0/0/3."
* Incorrect.
* DHCP requests originate from clients (PC1, attackers, etc.), not from the DHCP server.
* The DHCP request should be forwarded to the DHCP server via a trusted interface (not GE0/0
/3, which is untrusted).
* Option C: "When receiving a DHCP response packet on GE0/0/3, the switch forwards the packet through GE0/0/1."
* Incorrect.
* GE0/0/3 is an untrusted interface (connected to the attacker).
* DHCP responses (ACK, OFFER) from untrusted interfaces are dropped to prevent rogue DHCP attacks.
* The switch will not forward the packet.
* Option D: "When receiving a DHCP request packet on GE0/0/3, the switch forwards the packet through GE0/0/2."
* Correct.
* DHCP requests originate from clients (PC1 or attacker).
* Since DHCP requests are allowed on untrusted interfaces, the switch forwards them to the DHCP server via the trusted interface (GE0/0/2).
Final Answer:
# A and D are correct.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* DHCP Snooping and Port Trust Classification
* How Trusted and Untrusted Ports Handle DHCP Packets
* Preventing Rogue DHCP Servers Using DHCP Snooping

質問 # 72
In the IS-IS network shown in the figure, R1 introduces the default route through the "default- route-advertise always level-1" command. Which of the following descriptions are correct?
(Multiple choice)

A. There is no default route in R1's routing table
B. Although R1 is configured with the "default-route-advertise always level-1" command, it cannot import the default route
C. There is a default route in R3's routing table
D. There is a default route in R2's routing table

正解：A、D

質問 # 73
What characteristics must a high-risk operation plan have?

A. with verification
B. Strong operability
C. accurate
D. can return

正解：A、B、C、D

質問 # 74
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