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Huawei HCIE-Datacom V1.0 Sample Questions (Q121-Q126):
NEW QUESTION # 121
MPLS implements data forwarding based on two different planes. Which of the following statements regarding the forwarding mechanism are correct?
- A. If the tunnel ID is not 0x0, the normal IP forwarding process starts.
- B. If the tunnel ID is 0x0, the MPLS forwarding process starts.
- C. After an IP packet enters an MPLS domain, the MPLS device forwards the packet based on FIB table queries.
- D. The system automatically assigns an ID to the upper-layer application that uses a tunnel. This ID is also called the tunnel ID.
Answer: D
Explanation:
Understanding MPLS Forwarding Mechanism
MPLS (Multiprotocol Label Switching) is a high-performance forwarding mechanism that operates on two planes:
1##Control Plane:
EstablishesLabel Switched Paths (LSPs)using protocols likeLDP (Label Distribution Protocol),RSVP-TE (Resource Reservation Protocol - Traffic Engineering), orBGP-LU (BGP Label Unicast).
Assignslabelsto packets based on routing policies.
2##Data Plane (Forwarding Plane):
Uses aLabel Forwarding Information Base (LFIB)instead of traditional IP routing.
Packets areforwarded based on labels, not IP addresses.
Analysis of the Answer Choices
#C. The system automatically assigns an ID to the upper-layer application that uses a tunnel. This ID is also called the tunnel ID.
Correct:MPLS assigns aTunnel IDto applications that utilize tunnels (e.g.,VPNs, MPLS-TE, or L2/L3 services).
This ID helpsdifferentiate between various tunnel applications, ensuring traffic follows the correct LSP.
#A. After an IP packet enters an MPLS domain, the MPLS device forwards the packet based on FIB table queries.
Incorrect:MPLS routersdo NOT use the FIB (Forwarding Information Base)for forwarding once labels are assigned.
Instead, they useLFIB (Label Forwarding Information Base)to switch packets based on labels.
#B. If the tunnel ID is 0x0, the MPLS forwarding process starts.
Incorrect:If theTunnel ID is 0x0, MPLSdoes NOT start; it means no label is assigned, and traditionalIP forwardingoccurs.
#D. If the tunnel ID is not 0x0, the normal IP forwarding process starts.
Incorrect:If the Tunnel ID isnot0x0, MPLSforwards traffic using label switching, not IP forwarding.
NEW QUESTION # 122
When configuring ISIS zone authentication, which ISIS message will carry the authentication letter? ( Single choice questions).
- A. Hello message of ISIS's Level-2
- B. ISIS ?Level-2 ?SNP ?LSP?
- C. ISIS ?Level-1 ?SNP ?LSP?
- D. Hello message of ISIS's Level-1.
Answer: C
NEW QUESTION # 123
Which of the following are application optimization functions in the Huawei SD-WAN Solution?
- A. Intelligent traffic steering
- B. QoS
- C. Application identification
- D. WAN optimization
Answer: A,B,C,D
Explanation:
Huawei'sSD-WAN solutionoffers a full suite of application optimization technologies, including:
Application identification: Uses DPI and traffic signatures to identify applications.
Intelligent traffic steering: Dynamically routes traffic based on application type and real-time link performance.
WAN optimization: Reduces latency, deduplicates traffic, and optimizes throughput for key apps.
QoS: Prioritizes critical applications and ensures bandwidth guarantees.
All listed options are part of the Huawei SD-WAN solutionfor optimizing user experience and application performance.
Correct answers: A, B, C, D
NEW QUESTION # 124
In OSPFv3, which of the following types of LSAs can be flooded in the entire AS?
- A. Link-LSA
- B. Intra-Area-Prefix-LSA
- C. Inter-Area-Prefix-LSA
- D. AS-external-LSA
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
InOSPFv3, theAS-external-LSA (Type 5 LSA)is the only LSA type that can beflooded throughout the entire Autonomous System (AS). It is used to advertise external routes (routes redistributed from other routing protocols or static routes) into the OSPF domain.
B: Intra-Area-Prefix-LSA (Type 9):Used to advertise IPv6 prefixes within an OSPF area, not across the AS.
C: Link-LSA (Type 8):Advertises link-local addresses and options, only within the local link, not the entire AS.
D: Inter-Area-Prefix-LSA (Type 3 or Type 4):Advertises prefixes between OSPF areas but not throughout the entire AS.
OnlyAS-external-LSAs (Type 5)can be propagated across the whole OSPF AS, making them essential for exchanging routes learned from other routing protocols.
NEW QUESTION # 125
Which of the following is the mapping between VNIs and BDs in VXLAN implementation?
- A. N:M
- B. 1:1
- C. 1:N
- D. N:1
Answer: B
Explanation:
In Huawei'sVXLAN implementation, the typical mapping betweenVNIs (VXLAN Network Identifiers) andBDs (Bridge Domains)is:
1:1 mapping- each VNI is uniquely associated with a single bridge domain.
This allows properMAC learning and forwardingin the data plane for isolated tenant traffic.
Other mappings (N:1, 1:N, N:M) may be technically possible butnot recommendedor supported in most enterprise deployments.
Correct answer: B. 1:1
Reference:Huawei HCIE-Datacom V1.0 Study Guide -Chapter: VXLAN FundamentalsSection: VNI and BD Mapping
NEW QUESTION # 126
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