최신 H12-891_V1.0 무료덤프 - Huawei HCIE-Datacom V1.0
Which of the following is the purpose of configuring IS-IS fragmentation on an IS-IS device?
정답: D
설명: (DumpTOP 회원만 볼 수 있음)
/ifm/interfaces/interface in Huawei Open Programmability System (OPS) is the URL used to identify a device's managed object.
정답: B
설명: (DumpTOP 회원만 볼 수 있음)
The TTL field encapsulated in the MPLS label header can prevent infinite loops of MPLS packets. Which of the following statements regarding the TTL field are correct?
정답: A,B,C
설명: (DumpTOP 회원만 볼 수 있음)
Which of the following is the type ofnorthbound APIused byiMaster NCE-WAN?
정답: B
설명: (DumpTOP 회원만 볼 수 있음)
Man-in-the-middle attacks (MITM) or IP/MAC Spoofing attacksare common onintranetsand can causeinformation leakage.
Which configuration method can prevent these attacks?
Which configuration method can prevent these attacks?
정답: A
설명: (DumpTOP 회원만 볼 수 있음)
Which of the following statements does not cause the flapping of a VRRP group?
정답: B
설명: (DumpTOP 회원만 볼 수 있음)
The free mobility function is deployed on the iMaster NCE-Campus on a campus network. Which of the following information should an administrator pay attention to?
정답: A,B,C,D
설명: (DumpTOP 회원만 볼 수 있음)
IS-IS supports multi-instance and multi-process. Which of the following statements are correct about IS-IS multi-instance and multi-process?
정답: A,D
설명: (DumpTOP 회원만 볼 수 있음)
The Ingress VTEP performs both Layer 2 and Layer 3 table lookup for packet forwarding. The forwarding mode is ______ IRB forwarding.
정답:
(Capitalize the first letter.) IntegratedInVXLAN routing, there are two primary IRB forwarding modes:Integrated IRB forwarding: Both Layer 2 and Layer 3 lookups are performed at theIngress VTEPfor more efficient forwarding.Distributed IRBis another mode, but in this scenario, where both L2 and L3 lookups are needed at the Ingress VTEP, the correct mode isIntegrated.Correct answer: Integrated
During the implementation of iMaster NCE-Campus Wi-Fi location-based services (LBS), terminal location data is sent to an LBS platform through HTTP requests. Which of the following data formats is used in such HTTP requests?
정답: A
설명: (DumpTOP 회원만 볼 수 있음)
The BGP ORF function can be used to control the maximum number of routes that can be sent by a BGP peer. To achieve this, which of the following tools is used to send such a route list to BGP peers?
정답: C
설명: (DumpTOP 회원만 볼 수 있음)
Which of the following types of LSAs does OSPF use to support SR-MPLS?
정답: B
설명: (DumpTOP 회원만 볼 수 있음)
As shown in the figure, R1, R2, R3, and R4 reside in the same MPLS domain, and LDP (Label Distribution Protocol) is used to distribute MPLS labels.
R4 is the egress LSR (Label Switching Router) for the FEC (Forwarding Equivalence Class) 4.4.4.0/24.
To make R4 aware of QoS forwarding priority of a packet sent from R1 and destined for 4.4.4.0/24, Without looking up R4's label forwarding information base, The outgoing label of the FEC on R3 should be _____ (Enter an Arabic numeral without symbols).
R4 is the egress LSR (Label Switching Router) for the FEC (Forwarding Equivalence Class) 4.4.4.0/24.
To make R4 aware of QoS forwarding priority of a packet sent from R1 and destined for 4.4.4.0/24, Without looking up R4's label forwarding information base, The outgoing label of the FEC on R3 should be _____ (Enter an Arabic numeral without symbols).
정답:
0
Explanation:
Understanding MPLS LDP and PHP (Penultimate Hop Popping):
#Label Distribution in MPLS LDP:
LDP assignslabels to FECsso that routers can forward packets based on labels rather than IP lookup.
Labels areadvertised downstream(from R4 to R3, R3 to R2, and so on).
#Penultimate Hop Popping (PHP) Concept:
Theegress LSR (R4)doesnot require an incoming labelfor 4.4.4.0/24.
Instead,R3 (Penultimate LSR) removes the labelbefore forwarding the packet to R4.
R3 forwards the packet as an IP packet, not an MPLS packet, toavoid an unnecessary label lookup at R4.
InMPLS LDP, the label "0" is used to indicate an implicit NULL label (PHP operation).
Why the Answer is "0" (Implicit NULL Label)?
#Since R4 is the egress LSR, it does not need a label for 4.4.4.0/24.
#R3 assigns the outgoing label as "0" (Implicit NULL Label)to indicate that the label should be removed before sending to R4.
#R4 receives the packet as a pure IP packet (no MPLS label).
Why Other Answers Are Incorrect?
#Any value other than "0"
If R3 assigns a label (e.g., 100), R4 would need to perform anunnecessary MPLS lookup, which is inefficient.
Using "0" ensures PHP occurs, optimizing the forwarding process.
#Reference:Huawei HCIE Datacom - MPLS LDP and Penultimate Hop Popping (PHP)
Explanation:
Understanding MPLS LDP and PHP (Penultimate Hop Popping):
#Label Distribution in MPLS LDP:
LDP assignslabels to FECsso that routers can forward packets based on labels rather than IP lookup.
Labels areadvertised downstream(from R4 to R3, R3 to R2, and so on).
#Penultimate Hop Popping (PHP) Concept:
Theegress LSR (R4)doesnot require an incoming labelfor 4.4.4.0/24.
Instead,R3 (Penultimate LSR) removes the labelbefore forwarding the packet to R4.
R3 forwards the packet as an IP packet, not an MPLS packet, toavoid an unnecessary label lookup at R4.
InMPLS LDP, the label "0" is used to indicate an implicit NULL label (PHP operation).
Why the Answer is "0" (Implicit NULL Label)?
#Since R4 is the egress LSR, it does not need a label for 4.4.4.0/24.
#R3 assigns the outgoing label as "0" (Implicit NULL Label)to indicate that the label should be removed before sending to R4.
#R4 receives the packet as a pure IP packet (no MPLS label).
Why Other Answers Are Incorrect?
#Any value other than "0"
If R3 assigns a label (e.g., 100), R4 would need to perform anunnecessary MPLS lookup, which is inefficient.
Using "0" ensures PHP occurs, optimizing the forwarding process.
#Reference:Huawei HCIE Datacom - MPLS LDP and Penultimate Hop Popping (PHP)
IPsec SAs can be established in either manual mode or IKE auto-negotiation mode. Which of the following statements about the two modes is incorrect?
정답: D
설명: (DumpTOP 회원만 볼 수 있음)
During the migration test, which of the following indicates that the test is completed?
정답: D
설명: (DumpTOP 회원만 볼 수 있음)