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| Section | Weight | Objectives |
|---|---|---|
| Network Orchestration & Automation | 2% | - iMaster NCE overview - SDN and controller architecture |
| Multicast Protocols | 6% | - Multicast QoS - MSDP and anycast RP - PIM-SM/SSM |
| Advanced Routing Protocols | 15% | - Route control and fast convergence - BGP and MP-BGP - IS-IS advanced features - OSPF advanced features |
| Backbone Network Planning | 8% | - Scalability design - Architecture design - Capacity and traffic planning |
| Cloud Bearer Network | 8% | - Cloud interconnection architecture - Cloud service bearer requirements - DC interconnect technologies |
| High Reliability | 8% | - Fast protection switching - Fault detection and recovery - Network redundancy mechanisms |
| Automatic O&M | 2% | - Fault management - Monitoring and analysis |
| Tunnel Technologies | 15% | - SR-MPLS and SRv6 - TE and traffic engineering - MPLS fundamentals |
| VPN Technologies | 15% | - VPN deployment and troubleshooting - MPLS L3VPN - EVPN and VXLAN |
| IP Mobile Backhaul | 10% | - Synchronization and timing - Service isolation and QoS - 5G/4G backhaul architecture |
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NEW QUESTION # 30
Which statements correctly describe the MVPN route types used in the MVPN over BIERv6 solution?
Select all that apply.
Answer: A,C
Explanation:
Huawei Reference Verification:
Huawei's MVPN over BIERv6 control plane uses BGP MVPN route types for VPN membership and tunnel advertisement. Any MVPN-enabled sender or receiver PE may originate an Intra-AS I-PMSI A-D route advertising membership and the inclusive provider tunnel. These routes discover other MVPN participants and their transport information. S-PMSI A-D routes are originated by sender PEs to announce selective tunnels for specific multicast flows. Customer PIM (C-S,C-G) Join or Prune signaling is represented by the corresponding C-multicast route rather than being automatically converted into a Leaf A-D route. Thus B and C are correct.
Technical Deep Dive:
B and C are correct. BGP MVPN distinguishes inclusive and selective multicast distribution. Intra-AS I-PMSI A-D routes advertise VPN multicast membership and I-PMSI transport information; both sender and receiver PEs can originate them. C-multicast routing information describes receiver interest in individual customer multicast flows. A sender PE may advertise S-PMSI A-D information when selective transport for a particular flow is needed. A Leaf A-D route has a separate function, notably associated with tracking leaves for certain selective tunnel procedures, rather than being the direct translation of every customer PIM Join or Prune.
BIERv6 then uses bit-based forwarding to replicate service packets across the provider underlay without requiring conventional multicast state per flow on every P router. This control/data-plane separation supports large IPTV and enterprise multicast VPN deployments.
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NEW QUESTION # 31
In the network shown, RTA is in AS 100 and forms an EBGP peer relationship with RTB. RTB, RTC, RTD, RTE, and RTF are in AS 200. RTB, RTD, and RTE are also in sub-AS 65001, RTC is also in sub-AS 65002, and RTF is also in sub-AS 65003.
1. RTA imports route 1.1.1.1/32. What is the route's AS_Path after RTF receives it?
2. RTC imports route 3.3.3.3/32. What is the route's AS_Path after RTA receives it?
3. RTC imports route 3.3.3.3/32. What is the route's AS_Path after RTE receives it?
Exhibit 29.1 - Original topology/configuration figure
Answer: B
Explanation:
Huawei Reference Verification:
Huawei BGP confederations divide a large public AS into internal member autonomous systems while presenting a single AS identifier to external neighbors. Across member-AS boundaries, the exporting member- AS number is included in an AS_CONFED_SEQUENCE segment, commonly displayed in parentheses.
Confederation path segments are removed when exporting the route outside the confederation and the confederation AS number is used instead. Internal IBGP sessions within one member-AS do not prepend a new member-AS segment. Applying these rules gives (65001) 100 at RTF, 200 at RTA, and (65002) at RTE:
option C.
Technical Deep Dive:
C is correct. The externally visible confederation is AS200, with internal member ASs 65001, 65002 and
65003. For the first prefix RTA in AS100 advertises 1.1.1.1/32 to RTB in member AS65001. When RTB advertises it to RTF in member AS65003, RTB's member number is prepended as a confederation sequence, producing `(65001) 100`. For the second prefix RTC in member AS65002 originates 3.3.3.3/32 and the route crosses to RTB. Exporting it from the confederation toward RTA strips internal confederation segments and exposes AS200, yielding `200`. For the third prefix RTC advertises to RTB, which is in member AS65001.
RTE shares member AS65001 with RTB, so the path remains `(65002)` at RTE. These rules are standardized in RFC 5065 and allow confederation members to retain internal policy flexibility while presenting one coherent AS externally.
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NEW QUESTION # 32
In an EVPN L3VPNv4-over-SRv6 BE scenario, must P routers in a carrier network also support SRv6?
Answer: B
Explanation:
Huawei Reference Verification:
Huawei SRv6 Best Effort transports VPN services over native IPv6 reachability. An ingress PE can encapsulate the customer IPv4 packet using an outer IPv6 header whose destination identifies the remote egress service SID. Transit P routers forward the outer IPv6 packet by ordinary longest-prefix-match lookup toward the locator, without having to execute the service SID's endpoint behavior. The egress PE interprets its local SID and forwards the decapsulated customer traffic through the correct VPN instance. Therefore SRv6- capable PE endpoints are required but native SRv6 support on every P router is not mandatory.
Technical Deep Dive:
B is FALSE. An MPLS VPN transport typically requires P routers capable of swapping MPLS transport labels. SRv6 BE differs because ordinary IPv6 forwarding can carry the encapsulated service packet across the network. The ingress PE performs a customer VPN lookup, adds the outer IPv6 destination containing the egress service SID, and forwards into the IPv6 underlay. Each P router forwards according to its IPv6 FIB and need not understand End.DT4 or another egress service behavior. The egress PE receives the packet destined to its local SID, removes the appropriate transport encapsulation and performs the service VPN lookup. SRv6 support on transit routers remains useful for SRv6 TE, TI-LFA or other specialized transit behaviors but is not an inherent BE transport requirement. Underlay IPv6 reachability to the egress locator remains essential.
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NEW QUESTION # 33
Which vBRAS communication channel is used to carry forwarding-control data sent from the vBRAS-CP to the vBRAS-UP?
Answer: C
Explanation:
Huawei Reference Verification:
Huawei's CUPS design separates communication interfaces between vBRAS-CP and vBRAS-UP into protocol, control, and management functions. The control channel sends subscriber service and forwarding entries from the control-plane system to the user-plane device and supports user-plane event reporting.
Subscriber access signaling, such as PPPoE and IPoE messages requiring central processing, uses the protocol channel. Management operations and configuration queries use management-plane interfaces and protocols such as NETCONF. Once authentication succeeds, the CP distributes the forwarding rules needed for the UP to process traffic. The channel transporting those forwarding-control entries is the control channel.
Technical Deep Dive:
D is correct because the control channel exists specifically to program the distributed forwarding plane. The vBRAS-CP coordinates user sessions, authentication, address allocation, accounting, policy, and UP resource assignment. The vBRAS-UP terminates access connectivity, enforces forwarding and QoS policy, maintains subscriber counters, and handles the network-side transport functions. During PPPoE session setup, protocol messages reach the CP through the protocol channel. After the CP decides the applicable services, it sends session state and forwarding entries to the UP over the control channel, commonly associated with CUSP.
Management functions such as querying configuration or delivering equipment settings are distinct and can use NETCONF. Supported UP forwarding ASICs apply the installed user state without hairpinning ordinary traffic through the CP. This architecture permits centralized subscriber management together with distributed, scalable forwarding capacity.
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NEW QUESTION # 34
Which of the following statements regarding the telco cloud network are correct?
Select all that apply.
Answer: A,B,C,D
Explanation:
Huawei Reference Verification:
Huawei's Telco Cloud Transport architecture connects cloud workloads through spine-leaf fabrics, DC gateways, PEs, and centrally managed service networks. Route preference can distribute north-south traffic among PEs to avoid concentrated utilization. Separate management/storage and production networks improve operational isolation. A flattened spine-leaf topology provides multiple equal-cost routed paths and supports horizontal expansion. Where existing gateway appliances cannot carry projected north-south throughput, additional DC GWs can increase aggregate egress capacity when upstream routing and connectivity are correspondingly engineered. These points support all four intended design statements, although isolation must not be confused with an unconditional security guarantee.
Technical Deep Dive:
A, B, C, and D describe the intended telco-cloud engineering model. With multiple single-homed gateways, BGP preference and next-hop policies can steer traffic so one PE does not become an unnecessary bottleneck.
Physically separating management/storage and service functions reduces shared fault and attack exposure; access controls and other safeguards remain necessary because separation alone does not guarantee availability. A spine-leaf fabric uses multiple equal-cost underlay paths, predictable scale-out and flexible server/VNF attachment. Additional DC gateways increase north-south capacity when their upstream links and route-selection policies distribute flows appropriately. VXLAN with EVPN can isolate tenants over an IP underlay and provide distributed gateway service. Supported ASICs accelerate VXLAN encapsulation, IP lookups and ECMP decisions. The overarching objective is to scale bandwidth, reliability, segmentation and automation together, rather than merely increasing switch or gateway port capacity. Option B's phrase guaranteeing overall security should be softened.
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NEW QUESTION # 35
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