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| Section | Weight | Objectives |
|---|---|---|
| Advanced Ethernet Technologies | 10% | - Ethernet security - VLANs |
| Network O&M | 7% | - Data collection - Routine maintenance |
| Network Troubleshooting | 10% | - Structured troubleshooting processes - Troubleshooting methods |
| Advanced BGP Features | 10% | - BGP route control - Inter-domain routing optimization - Route reflectors - Advanced BGP features |
| IPv6 Routing | 20% | - IPv6 static routes - BGP4+ - OSPFv3 - IS-IS for IPv6 |
| MPLS Technologies | 19% | - MPLS configuration - MPLS forwarding - MPLS principles - MPLS VPN applications |
| Advanced IGP Features | 17% | - Fast convergence - Route control - OSPF advanced features - IS-IS advanced features |
| Network Cutover | 7% | - Migration process - Basic cutover concepts |
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NEW QUESTION # 184
To protect a device against the attacks of forged BGP messages, you can configure GTSM to check whether the TTL value in the IP message header is within the specified range. If the peer x.x.x.x valid-ttl-hops 100 command is configured on a device, the valid TTL value range of the detected message is [155, 255].
Answer: B
NEW QUESTION # 185
On the network shown in the figure, an administrator first completes the routing configuration and then enables MPLS and LDP on R1, R2, and R3 and their interconnected interfaces. In this manner, traffic from PC1 to PC2 can be forwarded based on MPLS. Which of the following routing configurations can implement this function?
Options:
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
This question is based on MPLS (Multiprotocol Label Switching) and its interaction with routing protocols
. The goal is to ensure PC1 (10.1.1.1) can communicate with PC2 (10.3.3.1) over MPLS. Let's analyze each option carefully.
1## Understanding MPLS Routing Requirements
To forward traffic using MPLS and LDP, we need:
* An IGP (Interior Gateway Protocol) like OSPF or IS-IS to advertise network reachability.
* Loopback interfaces advertised in OSPF to establish LDP neighbor relationships.
* Consistent MPLS LDP enablement on all links in the MPLS domain.
* End-to-end IP reachability between loopbacks (since LDP uses the loopback for label distribution).
2## Option A (Correct Answer) Analysis
This configuration enables OSPF on all routers (R1, R2, and R3) across the MPLS domain:
# All networks are advertised in OSPF area 0, ensuring IP reachability.# Loopback interfaces (1.1.1.1,
2.2.2.2, 3.3.3.3) are included, which is required for MPLS LDP peer establishment.# PC1's network (10.1.1.0/24) and PC2's network (10.3.3.0/24) are properly advertised, ensuring end-to-end connectivity.# R1, R2, and R3 have OSPF neighbor relationships, meaning LDP can use OSPF routes for label switching.
# Conclusion: Option A meets all MPLS forwarding requirements and is the correct answer.
3## Why Other Options Are Incorrect
# Option B (Incorrect)
* Uses BGP instead of OSPF, which is not optimal for MPLS forwarding in a simple MPLS domain.
* LDP requires an IGP like OSPF or IS-IS to work efficiently.
* BGP alone does not establish LDP label bindings between R1, R2, and R3.
# Option C (Incorrect)
* Mixes OSPF and BGP, causing routing inconsistency.
* Uses ip ip-prefix and recursive lookup, which is unnecessary in a standard MPLS domain.
* BGP does not distribute labels dynamically like an IGP with LDP.
# Option D (Incorrect)
* R1 does not advertise the 10.1.1.0/24 network, meaning PC1's network is not reachable.
* R3 does not advertise the 10.3.3.0/24 network, meaning PC2's network is not reachable.
* Missing essential routing entries for full end-to-end reachability.
References:
# HCIP-Datacom Advanced Routing & Switching Technology# Huawei Official MPLS and LDP Configuration Guide# Huawei Enterprise Networking Documentation
NEW QUESTION # 186
R1 executes the operation ping -a 10.1.1.1 10.5.16.2, what does this command mean?
Answer: C
NEW QUESTION # 187
In the OSPF network shown in the figure, the area numbers are marked in the figure, where area
1 is the Stub area, area 2 is the Totally NSSA area, and area 3 is the NSSA area. If R5 introduces an external route 10.0.5.5/32, which of the following routers do not have a route entry for 10.0.5.5/32 in their routing tables? (Multiple choice)
Answer: C,D
NEW QUESTION # 188
In an MPLS VPN network, data packets are forwarded when they enter the public network. Will be encapsulated with two layers of MPLS labels.
Which of the following descriptions are correct about the processing of the data packet? (Multiple choice)
Answer: C,D
NEW QUESTION # 189
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