BEST H12-891_V1.0 VCE, H12-891_V1.0 EXAM REFERENCE

Best H12-891_V1.0 Vce, H12-891_V1.0 Exam Reference

Best H12-891_V1.0 Vce, H12-891_V1.0 Exam Reference

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Candidates who pass the Huawei H12-891_V1.0: HCIE-Datacom V1.0 exam will be certified as HCIE-Datacom professionals. HCIE-Datacom V1.0 certification is globally recognized and is highly valued in the field of data communication. It is a testament to the skills and knowledge of candidates in designing, implementing, and managing complex data communication networks.

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Huawei HCIE-Datacom V1.0 Sample Questions (Q237-Q242):

NEW QUESTION # 237
In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, which of the following fields is NOT carried in BGP EVPN Type 5 routes?

  • A. IP Prefix Length
  • B. Route Distinguisher
  • C. GW IP Address
  • D. MAC Address

Answer: D

Explanation:
Understanding BGP EVPN and VXLAN Routing
EVPN (Ethernet VPN) with VXLANis used fordata center networkingandL3 VPN interconnection.
#BGP EVPN Route Types & Their Purpose
Type 2:MAC/IP Advertisement Route (Carries MAC + IP)
Type 3:Inclusive Multicast Route (Carries VTEP Multicast Information)
Type 5:IP Prefix Route(Used for Layer 3 VXLAN Routing)
#What does Type 5 route contain?
#Route Distinguisher (RD):Identifies a unique VPN instance.
#GW IP Address:Specifies theGateway IPfor L3 VXLAN routing.
#IP Prefix Length:Defines theIPv4/IPv6 network maskfor routing.
#MAC Address is NOT included in Type 5
Why is Option B (MAC Address) Correct?
#MAC addresses are carried in EVPN Type 2 routes, NOT in Type 5.
#Type 5 routes focus on IP prefixes, not MAC forwarding.
#Real-World Application:
VXLAN L3 Gateways (EVPN Type 5)allow routers to forwardIP traffic across VXLAN tunnels, removing the need for traditionalL3 VPNs.
#Reference:Huawei HCIE-Datacom Guide - BGP EVPN and VXLAN Routing


NEW QUESTION # 238
The following statement about the IS-IS protocol is incorrect?

  • A. The IS-IS protocol supports CLNP networks
  • B. Messages for the IS-IS protocol are encapsulated directly by the data link layer
  • C. The IS-IS protocol is a link-state protocol that runs between AS
  • D. The IS-IS protocol supports IP network ad

Answer: C


NEW QUESTION # 239
Exhibit:

A loop occurs because Spanning Tree Protocol (STP) is not enabled on the network. Which of the following symptoms may occur?

  • A. Host receives a large number of broadcast packets.
  • B. A loop alarm is generated on the LAN switch.
  • C. MAC entries flap.
  • D. CPU usage is too high.

Answer: A,C,D

Explanation:
When Spanning Tree Protocol (STP) is not enabled on a network, loops can occur in Layer 2 Ethernet networks, leading to various network issues. STP is designed to prevent loops by blocking redundant paths, and its absence can cause broadcast storms, MAC address table instability, and resource exhaustion. Let's analyze each option in the context of Huawei HCIE Datacom documentation and network behavior:
A: A loop alarm is generated on the LAN switch.
This option is incorrect. Huawei switches, as per HCIE Datacom standards, do not automatically generate a specific "loop alarm" unless configured with loop detection features (e.g., Huawei's Loop Detection Protocol or similar mechanisms). Without STP or loop detection enabled, the switch may not explicitly generate an alarm for a loop; instead, it will exhibit symptoms like broadcast storms or flapping MAC entries. Therefore, this is not a direct symptom of an STP-less loop. Reference: Huawei HCIE Datacom V3.0 Training Materials, Section 4.2 - Spanning Tree Protocol and Loop Prevention.
B: CPU usage is too high.
This option is correct. When a loop occurs without STP, broadcast packets (and sometimes multicast or unknown unicast packets) circulate endlessly in the network. This leads to excessive processing by switches as they handle these packets, resulting in high CPU usage. Huawei switches, as described in HCIE Datacom documentation, can experience CPU overload due to continuous packet forwarding and processing in a looped environment. Reference: Huawei HCIE Datacom V3.0, Chapter 5 - Switch Performance and Loop Management.
C: MAC entries flap.
This option is correct. In a loop without STP, switches continuously receive frames from multiple ports, causing MAC address tables to update repeatedly as the same MAC address appears on different ports. This
"flapping" of MAC entries destabilizes the network and can lead to incorrect frame forwarding. Huawei HCIE Datacom emphasizes MAC address table stability as a critical aspect affected by loops, as outlined in Section
4.3 - Ethernet Switching and Loop Mitigation. Reference: Huawei HCIE Datacom V3.0, Section 4.3.
D: Host receives a large number of broadcast packets.
This option is correct. A loop without STP causes broadcast packets to circulate indefinitely, creating a broadcast storm. Hosts connected to the network will receive an overwhelming number of these packets, potentially leading to performance degradation or even network timeouts. This is a well-documented symptom in Huawei HCIE Datacom training, specifically in discussions about loop prevention mechanisms.
Reference: Huawei HCIE Datacom V3.0, Chapter 4 - Layer 2 Loop Prevention.
Thus, the correct symptoms of a loop occurring due to the absence of STP include high CPU usage, flapping MAC entries, and hosts receiving a large number of broadcast packets. Option A is incorrect as it requires specific loop detection configuration, which is not implied in the question.
References:
Huawei HCIE Datacom V3.0 Training Materials, Sections 4.2, 4.3, and 5 - Spanning Tree Protocol, Loop Prevention, and Switch Performance.
Huawei Official Documentation on Ethernet Switching and Loop Management, available in HCIE Datacom Certification Guides (2023 update).


NEW QUESTION # 240
The correct description of the extended features of ISIS is ?

  • A. When the amount of information in the Link State Protocol data packet PDU to be released by ISIS is too large, the ISIS router will generate multiple LSP shards to carry more ISIS information.
  • B. If there are other vendors' devices on the network and do not support the LSP sharding function, the sharding expansion mode must be configured as Model-1, otherwise the message will not be recognized by other vendors' devices.
  • C. After you enable the LSP shard extension feature of your router, you can use it without restarting the ISIS process.
  • D. ISIS can choose whether to authenticate incoming SNP and LSP packets

Answer: A,B,D


NEW QUESTION # 241
The following statement about ISIS (IPv6) is correct?

  • A. IS-IS works at the data link layer and only needs to add a new TLV to support IPv6
  • B. To support the processing and computation of IPv6 routes, IS-IS has added NLPID to the 129TLV
  • C. In order to support the processing and calculation of IPV6 routes, IS-IS has added TLV232, 236
  • D. By default, IS-IS has the multi-topology feature turned on

Answer: A,B,C


NEW QUESTION # 242
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