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| Section | Weight | Objectives |
|---|---|---|
| MPLS Technologies | 19% | - MPLS OAM and protection - LDP and RSVP-TE protocols - MPLS fundamentals and label distribution - MPLS VPN (L3VPN, L2VPN) |
| Network O&M | 7% | - Configuration management and backup - Routine maintenance procedures - Log and alarm management - Network monitoring and performance analysis |
| Network Troubleshooting | 10% | - Routing protocol fault diagnosis - Structured troubleshooting methodology - Switching and link fault handling - Performance and service fault resolution |
| IPv6 Routing | 20% | - BGP4+ for IPv6 - Transition mechanisms (dual-stack, tunnel, translation) - OSPFv3 and IS-IS for IPv6 - IPv6 address planning and configuration |
| Network Cutover | 7% | - Cutover planning and risk assessment - Pre-cutover verification - Implementation and rollback strategy - Post-cutover validation |
| Advanced IGP Features | 17% | - IS-IS advanced features
|
| Advanced BGP Features | 10% | - Route reflectors and confederations - BGP route selection and attributes - BGP multi-homing and load balancing - Routing policies and filtering |
| Advanced Ethernet Technologies | 10% | - QinQ and VLAN mapping - Ethernet link aggregation and reliability - VLAN aggregation and MUX VLAN - Port isolation and security features |
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NEW QUESTION # 43
(Drag and drop) As shown in the figure, there is a message containing three-layer label headers. Please select the corresponding values of the X, Y, and Z fields in the figure. (Decimal)
Answer:
Explanation:
NEW QUESTION # 44
As shown in the figure, R1, R2, R3, and R4 are in the same PLs domain, and LDP is used to distribute IPLS labels between devices. R4 is the Egress LSR of the FEC 4.4.4.0/24. If you want to achieve R1 access
4.4.4.0/24, R4 does not need to query the label table but can know the forwarding priority of the data, then the outgoing label of R3 for the FEC should be:____. (Please fill in the Arabic numerals directly, without symbols)
Answer:
Explanation:
(0)
NEW QUESTION # 45
OSPF supports equal-cost load balancing. When the number of equal-cost routes on the network is greater than the number specified in the maximum load-balancing command and the candidate routes have the same priority (weight value), the routes with larger interface indexes are selected for load balancing.
Answer: A
Explanation:
This statement is false . In Huawei ' s implementation of OSPF equal-cost load balancing , when multiple candidate routes have equal metrics and the number of routes exceeds the configured maximum load- balancing limit, the selection order is:
* Interface priority (higher is preferred)
* Interface index (smaller is preferred)
* Next-hop IP address (smaller is preferred if others are the same)
So, smaller interface indexes are preferred-not larger.
# Official Reference from Huawei:
" If the number of equal-cost routes exceeds the maximum supported number, the device selects preferred routes in the following order: interface priority, interface index (smaller preferred), and next- hop IP address. "
- [Huawei HCIA-Datacom Certification Guide - OSPF Chapter]
NEW QUESTION # 46
In the enterprise network shown in the figure, R3 is connected to the enterprise network management server, and all devices in the network communicate with the network management server through VPN.
During the inspection, it was found that R3 had redundant RT configurations. Which of the following commands can be executed on R3 to delete the redundant RTs without affecting the connectivity of all devices and the network management server? (Multiple choice)
Answer: A,B,D
NEW QUESTION # 47
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?
Answer: A,B,D
Explanation:
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.
NEW QUESTION # 48
......
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