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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Advanced Ethernet Technologies | 10% | - Port isolation and security features - VLAN aggregation and MUX VLAN - QinQ and VLAN mapping - Ethernet link aggregation and reliability |
| Topic 2: Network Troubleshooting | 10% | - Switching and link fault handling - Performance and service fault resolution - Routing protocol fault diagnosis - Structured troubleshooting methodology |
| Topic 3: Advanced IGP Features | 17% | - OSPF advanced features
|
| Topic 4: MPLS Technologies | 19% | - MPLS fundamentals and label distribution - LDP and RSVP-TE protocols - MPLS VPN (L3VPN, L2VPN) - MPLS OAM and protection |
| Topic 5: Network Cutover | 7% | - Cutover planning and risk assessment - Post-cutover validation - Pre-cutover verification - Implementation and rollback strategy |
| Topic 6: IPv6 Routing | 20% | - IPv6 address planning and configuration - OSPFv3 and IS-IS for IPv6 - Transition mechanisms (dual-stack, tunnel, translation) - BGP4+ for IPv6 |
| Topic 7: Advanced BGP Features | 10% | - Route reflectors and confederations - Routing policies and filtering - BGP route selection and attributes - BGP multi-homing and load balancing |
| Topic 8: Network O&M | 7% | - Routine maintenance procedures - Configuration management and backup - Network monitoring and performance analysis - Log and alarm management |
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NEW QUESTION # 190
Regarding sham link, which of the following description is wrong?
Answer: B
NEW QUESTION # 191
R1 forwards the packet with the destination IP address of 4.4.4.4 on an MPLS network. Some LSP information of R3 is shown in the figure. During packet transmission, which of the following devices perform MPLS label operations?
Answer: A,C,D
Explanation:
# MPLS Domain Path Summary:
* Ingress: R1
* Transit: R2 # R3
* Egress: R4
* Destination IP: 4.4.4.4 (Loopback of R4)
MPLS Label Operations by Device:
# R1 (Ingress LSR)
# Push operation
* R1 assigns an MPLS label (1025) to the IP packet before forwarding it to R2.
* Label is determined using LDP or RSVP, depending on protocol used (LDP in this case).
# R2 (Transit LSR)
# Swap operation
* R2 swaps label 1025 with 1026 before sending to R3.
* Transit routers perform label swapping using the MPLS forwarding table.
# R3 (Transit LSR)
# Swap or Pop operation
* According to the LSDB output:
mathematica
CopyEdit
In-Label: 1026
Out-Label: 3
Label 3 is the implicit null label , which means R3 pops the label before forwarding to R4.
So, R3 performs a Pop operation .
# R4 (Egress LSR)
# No label operation
* R4 receives a pure IP packet (label was popped by R3).
* Egress LSR does not perform MPLS operations -it simply routes the packet using IP.
# Final answer: A, C, D
Official Huawei Extract:
" In an MPLS network, the ingress LSR pushes the label, transit LSRs swap the label, and the egress LSR receives an IP packet after the last label is popped. If the outgoing label is 3 (implicit null), the penultimate router performs PHP (penultimate hop popping). "
- [Huawei HCIA-Datacom Guide - MPLS Label Operations Chapter]
NEW QUESTION # 192
Regarding the BGPI MPLS IPVPN network architecture, which of the following descriptions is wrong?
Answer: B
NEW QUESTION # 193
The figure shows the file information on R2. When a network engineer runs the dir | exclude 1 command to view the file information, which of the following files will be displayed?
Answer: A
NEW QUESTION # 194
In a networking environment where the network is relatively stable and has high requirements for route convergence time, you can specify the OSPF LSA update interval to 0 to cancel the LSA update interval, so that topology or route changes can be immediately published to the network through LSA, thereby speeding up the route convergence speed in the network.
Answer: A
NEW QUESTION # 195
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