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| Section | Weight | Objectives |
|---|---|---|
| Network Reliability and Protection | 7% | - High Availability Design
|
| Network Service Technologies | 10% | - Carrier Services
|
| MPLS and Segment Routing | 20% | - Carrier Transport Technologies
|
| BGP Advanced Technologies | 20% | - Carrier-Grade BGP
|
| IPv6 Technologies | 8% | - IPv6 Deployment
|
| Carrier IP Network Architecture | 10% | - Carrier Network Evolution
|
| Network Automation and SDN | 5% | - Automation Technologies
|
| Network Operation and Maintenance | 5% | - Monitoring and Troubleshooting
|
| IGP Advanced Technologies | 15% | - OSPF and IS-IS Advanced Features
|
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NEW QUESTION # 19
Which of the following statements is not correct regarding the traditional metro network architecture?
Answer: A
Explanation:
Huawei Reference Verification:
Huawei carrier architectures distinguish subscriber service-edge functions, network transport, and backbone routing. Broadband gateways commonly supply subscriber service management, SRs provide VPN and business connectivity, OLTs aggregate optical subscribers, and CRs provide backbone connectivity. The logical routing design is independent of the physical interconnection design: simply connecting MSEs and SRs to a municipal CR does not determine that all three must belong to one AS. BGP autonomous-system membership is an operator-specific logical design choice. Consequently the common-AS assertion in C is inconsistent with the intended traditional metro-network diagram, though a shared AS could be a legitimate design in another topology.
Technical Deep Dive:
C is the intended incorrect statement. An MSE ordinarily provides HSI, VoIP, IPTV and subscriber management. The SR is a service-routing aggregation node commonly serving enterprise VPN connectivity; the CR aggregates and transports metro traffic toward the backbone; the OLT aggregates PON subscribers and uplinks to an MSE or suitable routing equipment. 4G backhaul and fixed services can share physical transport when traffic isolation, bandwidth engineering, and QoS are properly designed. What makes C problematic is treating a same-AS relationship as an intrinsic consequence of the MSE/SR/CR topology.
Devices connected by physical or logical links can exchange routes through EBGP across distinct autonomous systems, or they may use IBGP and an IGP within one AS. This question assumes a particular Huawei metro- AS deployment. Under that assumed deployment C is incorrect; outside it, the statement is not universally impossible. The architectural premise is essential to a rigorous interpretation.
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NEW QUESTION # 20
Which of the following statements are true regarding multicast packets in a BIERv6 multicast network?
Select all that apply.
Answer: B,C
NEW QUESTION # 21
Which of the following statements are accurate about the SR Policy configuration shown?
Exhibit 33.1 - Original topology/configuration figure
Select all that apply.
Answer: A,B,C
Explanation:
Exact Extract - Huawei Training Material (Automatic SDN Network O & M, p.19):
"SR-MPLS TE Policy is a new tunnel diversion technology developed based on SR. An SR-MPLS TE policy consists of the following three parts: Ingress, Color, and End point. Color indicates the extended community attribute carried in the SR-MPLS TE Policy. End point specifies the destination address of the SR-MPLS TE Policy." Huawei Reference Verification:
Huawei SR-MPLS TE Policy architecture identifies an ingress, a Color Extended Community and an endpoint. Eligible BGP VPN routes can be steered to a policy when the route's BGP next hop matches the policy endpoint and its Color Extended Community matches the policy color. Candidate paths are ordered by preference, and the highest valid preference determines the active path. In the exhibit CP2 has preference 200, while CP1 has 100, so CP2 is active. The color can be transmitted as a BGP route attribute. Traffic's destination address alone is not the matching criterion for automatic color-based recursion. Thus A, C and D are correct.
Technical Deep Dive:
A, C and D are correct. The SR Policy has Color Green, Endpoint 3.3.3.3 and Binding SID 30028. CP1 carries labels 20004 and 20003 with preference 100, whereas CP2 carries 20006 and 20005 with preference
200. CP2 wins when valid because its preference is greater. A BGP service route carrying Green as its Color Extended Community and 3.3.3.3 as its next hop can recurse to that policy. The packet's own final destination may be a customer prefix unrelated to 3.3.3.3; the routing recursion matches the BGP next hop and color. The BSID identifies the policy and abstracts its current active segment list. Huawei's forwarding plane translates the selected list into the required MPLS label operations and forwards packets accordingly. Distinguishing route next hop from packet destination avoids the incorrect answer B.
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NEW QUESTION # 22
Assume Flex-Algo is configured on a device and a tunnel policy is set for the device to preferentially select a Flex-Algo-based SR-MPLS BE tunnel. Under which of the following conditions would a VPN route recurse to the Flex-Algo-based SR-MPLS BE tunnel?
Select all that apply.
Answer: A,D
Explanation:
Huawei Reference Verification:
Huawei uses a BGP Color Extended Community to associate service routes with transport characteristics and a BGP next-hop address to identify the transport destination. A tunnel policy can prefer SR-MPLS Best Effort tunnels calculated using Flex-Algo. The service route's color identifies the desired algorithm or constrained transport slice, and the next hop identifies the endpoint that the tunnel must reach. The Flex-Algo algorithm ID defines how the routing topology is calculated, while link affinity influences eligible links within that algorithm. Color and BGP next hop are the route-level recursion matching information; accordingly B and C are correct.
Technical Deep Dive:
B and C are correct. A Flex-Algo definition builds a separate constrained SPF topology using algorithm- specific attributes such as metrics and administrative group restrictions. Tunnel policies can map service colors to appropriate Flex-Algo paths. When a VPN route arrives, its BGP Color Extended Community describes the desired transport behavior, and its next-hop address identifies the remote PE or tunnel endpoint.
The device matches that pair against eligible tunnels and installs the resulting forwarding recursion. Affinity (A) can control which physical links participate in the algorithm-specific topology, but is not the route's direct matching attribute. Algorithm ID (D) identifies the computation algorithm rather than independently defining the BGP route recursion key. After resolution, forwarding NP/ASIC hardware applies the programmed SR- MPLS labels and next-hop group. This separation allows a carrier to provide differentiated transport characteristics without manually defining an explicit LSP for every VPN route.
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NEW QUESTION # 23
In SRv6 BE scenarios, the original IPv6 packet encapsulation structure remains unchanged. SRv6 packets continue to be IPv6 packets and can be recognized by common IPv6 devices.
Answer: A
Explanation:
Huawei Reference Verification:
Huawei SRv6 Best Effort uses the native IPv6 forwarding plane. The ingress may place the service SID in an outer IPv6 destination address, and ordinary IPv6-capable P routers forward according to their IPv6 FIB without needing to execute SRv6-specific endpoint behavior. SRv6 BE typically uses shortest-path transport based on IGP reachability rather than explicitly engineered segment lists. The packet remains a valid IPv6 packet that standard IPv6 routers can recognize and carry. This supports A as the intended answer, without implying that SRv6 services never add an outer IPv6 header or optional routing extension.
Technical Deep Dive:
A is TRUE. SRv6 represents forwarding instructions as 128-bit IPv6 SIDs combining a routable locator with an endpoint function and possibly arguments. In Best Effort mode an IPv6 underlay computes reachability to the destination locator; intermediate P routers perform ordinary longest-prefix-match forwarding. The SRv6- capable egress PE recognizes the local service SID and executes its behavior, such as End.DT4 for a customer IPv4 VPN. This compatibility allows gradual introduction of SRv6 services without demanding SID processing on every transit node. It is important not to interpret 'original IPv6 packet structure remains unchanged' as a guarantee of no encapsulation overhead: an outer IPv6 header may be added when carrying VPN traffic, and an SRH may be present in other SRv6 modes. The claim concerns the fundamental use of standard IPv6 forwarding and packet format rather than the absence of additional headers.
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NEW QUESTION # 24
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