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| Section | Weight | Objectives |
|---|---|---|
| IPv6 Technologies | 8% | - IPv6 Deployment
|
| MPLS and Segment Routing | 20% | - Carrier Transport Technologies
|
| Network Automation and SDN | 5% | - Automation Technologies
|
| Network Reliability and Protection | 7% | - High Availability Design
|
| IGP Advanced Technologies | 15% | - OSPF and IS-IS Advanced Features
|
| Network Operation and Maintenance | 5% | - Monitoring and Troubleshooting
|
| BGP Advanced Technologies | 20% | - Carrier-Grade BGP
|
| Network Service Technologies | 10% | - Carrier Services
|
| Carrier IP Network Architecture | 10% | - Carrier Network Evolution
|
No doubt the HCIE-Datacom-Carrier (Written) V1.0 (H35-831) certification is one of the most challenging certification exams in the market. This Huawei H35-831 certification exam gives always a tough time to HCIE-Datacom-Carrier (Written) V1.0 (H35-831) exam candidates. The Exams4sures understands this hurdle and offers recommended and real Huawei H35-831 exam practice questions in three different formats.
NEW QUESTION # 43
Which of the following SIDs encapsulates the outer destination address for BIERv6 multicast packets?
Answer: A
Explanation:
Huawei Reference Verification:
Huawei BIERv6 encapsulates a Bit Index Explicit Replication forwarding header in IPv6 and defines an End.
BIER SID for Bit-Forwarding Router processing. The outer IPv6 destination address contains the End.BIER SID of the next BIERv6 forwarding router. On receipt, the local node processes the BIERv6 header and BitString, consults its BIFT, and determines the required downstream replicas. An End.DT6 service SID or End.DX6 cross-connect SID implements a different SRv6 endpoint behavior. End.BIER is therefore the correct choice.
Technical Deep Dive:
D is correct. BIERv6 enables efficient multicast transport without maintaining conventional per-flow (S,G) state on every transit node. The packet carries a BitString identifying destination BFRs and an outer IPv6 address identifying the next-hop BIER-aware forwarding behavior. Each BFR receives the packet addressed to its End.BIER SID, reads the BitString, looks up forwarding choices in the Bit Index Forwarding Table, and creates the packet copies necessary for different downstream branches. The next hop's End.BIER SID is installed in the outgoing outer IPv6 destination. End.DT6 is associated with decapsulation into an IPv6 routing table; End.DX6 sends a decapsulated packet toward a specific IPv6 adjacency. Neither provides the BIERv6 replication function. On capable carrier hardware, BitString processing and replica creation can be performed in forwarding silicon.
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NEW QUESTION # 44
In the inter-AS VPN Option A network shown, CE1 and CE2 are in the same VPN. LDP and IGP are configured in both AS100 and AS200, and EBGP is configured between the ASBRs. CE1's loopback interface is assigned 10.1.1.1/32. If CE2 can ping CE1, which router assigns the inner label to CE2-to-CE1 packets forwarded by PE2?
Exhibit 45.1 - Original topology/configuration figure
Answer: B
Explanation:
Huawei Reference Verification:
In Huawei inter-AS MPLS VPN Option A, each ASBR runs customer VPN instances and exchanges VPN route information with its opposite ASBR over an ordinary inter-AS IP routing relationship. The ASBR-to- ASBR boundary resembles a CE-PE attachment rather than a single end-to-end MPLS VPN LSP. Within each AS, local MP-BGP advertisements include locally allocated VPN labels. For traffic traveling from CE2 in AS200 toward CE1 in AS100, ASBR2 advertises the CE1 destination route to PE2 using the VPN label allocated by ASBR2. Therefore ASBR2 supplies PE2's inner VPN label.
Technical Deep Dive:
B is correct. CE1 originates route 10.1.1.1/32, which PE1 learns and advertises through VPNv4 toward ASBR1 in AS100. In Option A, ASBR1 exchanges the corresponding ordinary IP route across the inter-AS VPN attachment to ASBR2. ASBR2 then advertises it to PE2 in AS200 as a labeled VPNv4 route and allocates its local VPN label. PE2 pushes this VPN label as the inner label and, where necessary, a public transport label outside it. P2 handles the transport forwarding, while ASBR2 interprets the local VPN context and forwards the packet across the AS boundary. The labels used in AS100 and AS200 need not be the same.
The defining principle of Option A is that VPN state and inter-AS connectivity terminate on both ASBRs, avoiding one continuous end-to-end VPN label stack.
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NEW QUESTION # 45
Which statement below is incorrect regarding SRv6 networks?
Answer: B
Explanation:
Huawei Reference Verification:
Huawei SRv6 implementations support reduced encapsulation in which the active SID is placed in the outer IPv6 destination address. When only one SID is required and no additional SRH metadata must be carried, an SRH can be omitted. The SRH is normally used when several ordered segments must be represented or processing requires its additional fields. RFC 8986 explicitly permits reduced SRH encapsulation for applicable cases. Thus D is incorrect because it claims that the SRH is compulsory even for a single-SID path.
Technical Deep Dive:
D is incorrect. SRv6 represents an ordered list of SIDs using the outer IPv6 destination and, when needed, a Segment Routing Header containing the remaining segment list. When a packet needs only one service SID, the SID can be placed directly in the IPv6 destination address, removing unnecessary extension-header bytes.
This is especially useful in SRv6 Best Effort service transport such as an IPv4 VPN using an End.DT4 egress SID. The ingress encapsulates the original packet, transit routers use IPv6 routing toward the locator, and the egress PE executes the SID behavior and VPN-table lookup. Manually configured versus dynamically allocated End.DT4 SIDs follow platform precedence rules; End SIDs must be unique within the relevant SID addressing domain. C states a Huawei-specific interface restriction and should not be treated as a generic IETF limitation on all SRv6 platforms. Reduced encapsulation improves efficiency but does not mean SRv6 VPN transport always has zero encapsulation overhead.
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NEW QUESTION # 46
Which of the following statements are true regarding multicast packets in a BIERv6 multicast network?
Select all that apply.
Answer: B,D
Explanation:
Huawei Reference Verification:
Huawei BIERv6 maps receiver BFR-IDs into BitStrings divided into sets according to the BitString length. A single multicast service may have receivers whose BFR-IDs belong to more than one set. The ingress BFIR must create set-specific copies with the matching Set Identifier and BitString. Because several sets may share part of the forwarding topology, multiple copies of the same multicast flow can traverse the same physical link. This makes B and D true, while the statements that receivers must share one set or that only one copy can traverse a link are incorrect.
Technical Deep Dive:
B and D are correct. A BIERv6 BitString indicates target receiver BFR-IDs within a set. If receiver numbering or scale exceeds one set's capacity, traffic is represented by multiple set-specific packets. A BFIR creates the necessary copies and each carries the proper set number and BitString; forwarding nodes replicate according to their BIFT. Paths for different sets can overlap, so two or more copies of the same multicast payload may traverse a shared link. This differs from the simplified expectation that a multicast forwarding tree always carries exactly one copy per link. BFR-ID planning is important because efficient allocation can reduce unnecessary duplicated packets and optimize bandwidth usage. Destination sets permit scalability without arbitrarily large per-packet BitStrings. The forwarding hardware uses the set and bit information to select the next-hop fan-out.
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NEW QUESTION # 47
iFIT is an in-band flow-measurement technology that delivers highly precise performance measurements based on real traffic. Which functions can it provide when used with telemetry, a second-level data-collection technology, and NCE, an integrated management and control platform?
Select all that apply.
Answer: A,C,D
Explanation:
Exact Extract - Huawei Training Material (Automatic SDN Network O & M, p.52):
"iFIT is a performance detection method for in-service traffic detection. It provides high-precision real-time traffic detection and works with the Telemetry second-level data collection to implement real-time visualization of network quality, proactive monitoring, and quick fault demarcation and locating." Huawei Reference Verification:
Huawei's Automatic SDN O & M module characterizes iFIT as in-service flow performance detection using high-precision real-traffic measurement and second-level telemetry. It specifically lists real-time visualization of network quality, proactive monitoring, and quick fault demarcation and location. iFIT-enabled forwarding hardware identifies measured flows, counts packets and records time information to calculate delay and loss.
iMaster NCE-IP correlates these records across network nodes to present service-level performance and identify the faulty section. Network redundancy protection is a separate function associated with protection mechanisms rather than measurement. Accordingly B, C and D are correct.
Technical Deep Dive:
B, C and D are correct. iFIT works on real production flows rather than relying entirely on synthetic probing, which may not follow the same forwarding path as customer traffic. Ingress and downstream measurement points record packet counts and timestamps. Comparing samples across hops supports fault demarcation, while telemetry sends near-real-time records to iMaster NCE-IP for SLA visualization and proactive abnormality detection. Packet-loss rate is calculated as (Tx-Rx)/Tx, using corresponding observation windows and matched flows. Supported forwarding NP/ASIC functions implement flow identification and statistical operations at high throughput. The controller can use observed packet loss, delay or jitter to inform tunnel optimization or self-healing workflows. But iFIT itself does not provide the alternate link, replicated forwarding state or local FRR operation necessary for redundancy. Mechanisms such as TI-LFA, VPN FRR or hot standby provide protection; iFIT supplies the visibility required to detect and localize degradation.
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NEW QUESTION # 48
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