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| Section | Objectives |
|---|---|
| Topic 1: IPv6 and Advanced IP Technologies | - IPv6 deployment
|
| Topic 2: WAN and VPN Technologies | - MPLS fundamentals
|
| Topic 3: Enterprise Network Architecture | - Network design principles
|
| Topic 4: Data Center and Virtualization Technologies | - VXLAN and overlay networks
|
| Topic 5: Network Security and QoS | - Security mechanisms
|
| Topic 6: Routing and Switching Technologies | - IP routing protocols
|
| Topic 7: Network Automation and Programmability | - SDN and automation
|
>> Exam H12-891_V1.0 Exercise <<
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NEW QUESTION # 180
As shown in the figure, SWA, SWB, SWC all run RSTP, GED/O/2 on SWB Ports and GEO/0/1 ports on SWC have a port role of ? Radio
Answer: B
NEW QUESTION # 181
What is the field that the IPv6 header has similar to the IPv4 header "Type of Service" field?
Answer: B
NEW QUESTION # 182
An enterprise has three types of services. Voice and video services are key services and need to be guaranteed, and FTP services are non-key services. Which of the following scheduling modes is optimal for satisfying the service requirements?
Answer: D
Explanation:
PQ (Priority Queuing) ensures low-latency services like voice and video are prioritized.
WFQ (Weighted Fair Queuing) fairly allocates remaining bandwidth to services like FTP.
Option B provides a balanced approach: guarantees for voice/video via PQ, and fairness for FTP via WFQ.
Exact Extract - Huawei HCIE-Datacom QoS Module:
"Voice and video traffic should be handled by PQ to minimize delay and jitter. Non-critical services such as FTP should be placed in WFQ queues to ensure bandwidth fairness." Reference:
Huawei HCIE-Datacom Study Guide - QoS Mechanisms and Scheduling
Huawei QoS Configuration Guide - Traffic Classification and Scheduling Models
NEW QUESTION # 183
On the campus network shown, IPv6 is deployed for service tests. Four routers are deployed on the network, and OSPFv3 is used for IPv6 network connectivity. An engineer checks the LSDB of R2 and obtains a Link- LSA. Which of the following statements about the LSA are correct?
Answer: A,B,D
Explanation:
InOSPFv3,Link-LSA (Type 8)is generated by a routerfor each of its interfacesto advertise:
Therouter ' s link-local addresson that interface.
TheIPv6 prefixesassociated with the interface.
Flags and options, such as router priority or loopback indicators.
From the output:
Link-LSA (Interface GigabitEthernet0/0/0)
Originating Router: 10.1.2.2
Link-Local Address: FE80::2E0:FCFF:FECD:4F79
Prefix: 2001:DB8:2345:23::/64
A). The link-local address of R2's GE0/0/0 is FE80::2E0:FCFF:FECD:4F79# This matches the Link-Local Address field in the LSA.# B). The IPv6 address prefix of R2's GE0/0/0 is 2001:DB8:2345:23::/64# This matches the Prefix field in the LSA.# C). This LSA indicates that R2 does not support external routes but can participate in IPv6 route calculation##Incorrect.
TheLink-LSAdoesnot provide any indicationabout external route capabilities.
It simply advertisesinterface-specific IPv6 and link-local info.
Whether R2 supports external routes depends onType 5 (External) or Type 7 (NSSA) LSAs, not Link-LSAs.
D). This LSA is generated by R2# The Originating Router: 10.1.2.2 is R2's router ID, so this LSA is definitely generated by R2.# Correct Answers:A, B, D The Link-LSA in OSPFv3 contains:
The link-local address used by the originating router on the link.
A list of all IPv6 prefixes associated with the link.
Flags such as router priority and the Router-LSA options.
These LSAs are alwaysgenerated by the router itselfand arenot flooded beyond the link.
Reference:Huawei HCIE-Datacom V1.0 Study GuideChapter:OSPFv3 Routing ProtocolSection:OSPFv3 LSA Types and Their Roles (Link-LSA)
NEW QUESTION # 184
The path of an SR-MPLS TE tunnel can be calculated by the controller or tunnel ingress.
Answer: B
Explanation:
Understanding SR-MPLS TE (Segment Routing MPLS Traffic Engineering)
#What is SR-MPLS TE?
Segment Routing (SR) replaces traditional MPLS LDP/RSVP-TE signaling.
UsesSR-TE policiesto define network pathswithout requiring per-flow state on intermediate routers.
#How is the SR-MPLS TE Path Calculated?
#By the SDN Controller (Centralized Path Computation)
The controller (e.g.,Huawei iMaster NCE) calculates theoptimal SR pathbased on:
Bandwidth requirements
Latency constraints
Traffic policies
The controllerthen delivers the SR policy to the ingress router.
#By the Ingress Router (Distributed Path Computation)
Theingress routercomputes theSR path dynamicallybased onlocal constraints.
This method is usefulwhen no centralized controller is available.
Why is the Answer TRUE?
#Both centralized (controller-based) and distributed (ingress router-based) path computation are supported in SR-MPLS TE.
Real-World Application:
5G and Cloud WANs:Centralized path optimizationreduces congestion dynamically.
Enterprise Networks:Local path computation ensuresfast rerouting in case of failures.
#Reference:Huawei HCIE-Datacom Guide - SR-MPLS TE and Path Computation Methods
NEW QUESTION # 185
......
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