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Huawei H12-831_V1.0 Exam Syllabus Topics:

Section	Objectives
Network Services and Optimization	- Multicast Technologies 1. Multicast distribution models 2. PIM protocol operations - QoS Fundamentals 1. Traffic classification and marking 2. Congestion management mechanisms
MPLS and VPN Technologies	- VPN Implementation 1. L3VPN configuration principles 2. Inter-AS VPN scenarios - MPLS Fundamentals 1. Label switching mechanism 2. LDP basics
Advanced Routing Protocols	- OSPF Advanced Features 1. LSA types and area types 2. Route calculation and optimization - BGP Configuration and Policy Control 1. Route filtering and policy control 2. BGP attributes and path selection
IP Network Technologies	- IS-IS Routing Protocol 1. Route convergence and optimization 2. Level-1/Level-2 design - IPv6 Deployment 1. Dual-stack and tunneling technologies 2. IPv6 addressing and transition mechanisms
Network Design and Troubleshooting	- Fault Diagnosis 1. Routing loop troubleshooting 2. Protocol convergence issues - Enterprise Network Design 1. Hierarchical network architecture 2. High availability design principles

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H12-831_V1.0 Fragen Antworten, H12-831_V1.0 Deutsch

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Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 H12-831_V1.0 Prüfungsfragen mit Lösungen (Q24-Q29):

24. Frage
Both VLAN aggregation and MUX VLAN are deployed on the enterprise network shown in the figure, and all switch interfaces connected to terminals are access interfaces. Given this, match PCI to PC4 with the hosts or servers that they can access on the network. (Note: A host cannot be matched with itself. For example, PCI cannot match PCI.) (Tokens can be reused.)

Antwort:

Begründung:

25. Frage
The figure shows the LSP information of R1 and R3 on an MPLS network. An administrator runs the ping -a 1.1.1.1 3.3.3.3 command on R1. Given this, which of the following statements is true?

A. Both the Echo Request and Echo Reply packets received by R2 do not carry any label.
B. The Echo Request packet received by R2 carries label 1025, and the Echo Reply packet received by R2 carries label 1024.
C. The Echo Request packet received by R2 carries label 1025, and the Echo Reply packet received by R2 does not carry any label.
D. The Echo Request packet received by R2 does not carry any label, and the Echo Reply packet received by R2 carries label 1024.

Antwort: C

26. Frage
If the Sticky MAC function of the interface is enabled, what is the number of MAC addresses learned by the interface by default?

A. 0
B. 1
C. 2
D. 3

Antwort: D

27. Frage
R1 forwards a packet with the destination IP address of 4.4.4.4 on an MPLS network.
* Some LSP (Label Switched Path) information of R3 is shown in the figure.
* During packet transmission, which of the following devices perform MPLS label operations?

A. R1
B. R3
C. R4
D. R2

Antwort: A,B,D

Begründung:
Comprehensive and Detailed In-Depth Explanation:
To determine which devices perform MPLS label operations, we need to analyze MPLS forwarding behavior based on the roles of each router in the MPLS domain.
1. Understanding MPLS Label Operations
MPLS label switching involves three main operations:
* Label Push (Ingress LSR - Label Imposition): The ingress router (R1) assigns an MPLS label to the packet.
* Label Swap (Transit LSR - Label Forwarding): The transit routers (R2, R3) swap the label for the next- hop router.
* Label Pop (Egress LSR - Label Disposition): The egress router (R4) removes the MPLS label before forwarding the packet to its final destination.
2. Examining MPLS Roles of Each Router
# R1 (Ingress LSR) # Performs Label PUSH
* R1 adds an MPLS label (1025) to the IP packet and forwards it to R2.
* Operation: Push MPLS Label (Label Imposition).
* # R1 performs MPLS label operations.
# R2 (Transit LSR) # Performs Label SWAP
* R2 receives a labeled packet (1025) from R1, swaps it with label 1026, and forwards it to R3.
* Operation: Swap MPLS Label (Transit Label Forwarding).
* # R2 performs MPLS label operations.
# R3 (Transit LSR) # Performs Label SWAP
* R3 receives label 1026 and swaps it with label 3, then forwards it to R4.
* Operation: Swap MPLS Label (Transit Label Forwarding).
* # R3 performs MPLS label operations.
# R4 (Egress LSR) # Does NOT Perform MPLS Operations
* R4 is the egress router and does not forward the packet further using MPLS.
* The last router removes the MPLS label (Pop) and forwards the plain IP packet.
* R4 is NOT performing MPLS label switching (swap or push), only popping the label before delivering the packet.
* # R4 does NOT perform MPLS label operations.

28. Frage
On the IS-IS IPv6 network shown in the figure, after the network becomes stable:
* R1 can ping 2000:12::0 , and
* The display ipv6 neighbors command can be used to display the MAC address corresponding to
2000:12::0 .

Is this statement TRUE or FALSE?

A. FALSE
B. TRUE

Antwort: A

Begründung:
Comprehensive and Detailed In-Depth Explanation:
Understanding the IPv6 Addressing and IS-IS Network
* IPv6 Addressing in the Figure:
* R1 has the address: 2000:12::1/64
* R2 has the address: 2000:12::0/127
* The link between them is using a /127 subnet (2000:12::0/127).
* Behavior of IPv6 /127 Subnet Mask
* In IPv6, a /127 prefix is commonly used on point-to-point links to avoid the issue of subnet- router anycast (::0) .
* RFC 6164 recommends using /127 instead of /64 for point-to-point links to reduce unnecessary anycast behavior .
* 2000:12::0 is the network address (first address in the subnet) and is not assigned to an interface .
Analyzing the Two Statements in the Question
Statement 1: " R1 can ping 2000:12::0 " # (Incorrect)
* In IPv6, the first address (::0) in a /127 subnet is typically reserved as a network address and not assigned to any router .
* R1 cannot ping 2000:12::0 because it is not assigned to R2 as an active IP.
* Correct ping targets would be:
* R1 pinging R2's actual address (2000:12::1 or 2000:12::2 depending on numbering).
Statement 2: " display ipv6 neighbors command can be used to display the MAC address corresponding to 2000:12::0 " # (Incorrect)
* The display ipv6 neighbors command is used to show the MAC address of an active neighbor (i.e., a reachable device).
* Since 2000:12::0 is not assigned to a specific router , it will not have a MAC address in the neighbor table .
Final Conclusion:
# R1 cannot ping 2000:12::0 because it is the network address in a /127 subnet.
# The display ipv6 neighbors command cannot show a MAC address for 2000:12::0 because it is not assigned to a router.
Thus, the correct answer is: B. FALSE .
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - IPv6 Addressing and IS-IS for IPv6 Huawei Official HCIP-Datacom Study Guide - IPv6 Neighbor Discovery and Point-to-Point Links RFC 6164 - Using 127-Bit IPv6 Prefixes on Inter-Router Links

29. Frage
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