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Huawei H12-821_V1.0 Exam Syllabus Topics:

SectionObjectives
IPv6- IPv6 Fundamentals
  • 1. IPv6 Routing
  • 2. IPv4 to IPv6 Transition
  • 3. IPv6 Addressing
Ethernet Switching Technology- Switching Fundamentals
  • 1. Link Aggregation
  • 2. STP/RSTP/MSTP
  • 3. VLAN
Network Reliability- Reliability Technologies
  • 1. VRRP
  • 2. BFD
  • 3. Redundancy Design
Routing and Traffic Control- Traffic Management
  • 1. Traffic Optimization
  • 2. Route Filtering
  • 3. Policy-based Routing
Network Service and Management- O&M Technologies
  • 1. Telemetry
  • 2. Network Monitoring
  • 3. SNMP
IS-IS- IS-IS Fundamentals
  • 1. Level-1 and Level-2 Routing
  • 2. LSP and SPF Mechanism
  • 3. IS-IS Neighbor Establishment
BGP- BGP Technologies
  • 1. BGP Path Selection
  • 2. BGP Route Advertisement
  • 3. IBGP and EBGP
WLAN- Wireless Networking
  • 1. WLAN Architecture
  • 2. WLAN Deployment
  • 3. Wireless Security
Routing Basics- IP Routing Fundamentals
  • 1. Route Selection
  • 2. Static Routing
  • 3. Routing Table Principles
Network Solutions- Enterprise Network Solutions
  • 1. Datacom Architecture
  • 2. Campus Network
  • 3. WAN Solution
OSPF- OSPF Fundamentals
  • 1. OSPF Neighbor Relationship
  • 2. OSPF Area Design
  • 3. LSA and SPF Calculation
Multicast- IP Multicast Technologies
  • 1. PIM
  • 2. IGMP
  • 3. Multicast Forwarding
Network Security- Security Technologies
  • 1. AAA
  • 2. ACL
  • 3. Attack Prevention

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q335-Q340):

NEW QUESTION # 335
IGMP snooping enables a switch working at Layer 3 to establish a Layer 3 multicast forwarding table by listening to IGMP messages exchanged between the upstream Layer 3 device and the user hosts. The switch working at Layer 3 manages and controls the forwarding of multicast data packets based on the Layer 3 multicast forwarding table, thus suppressing multicast data flooding on the Layer 3 network.

Answer: B


NEW QUESTION # 336
In a large-scale WLAN network, when the VLAN Pool uses HASH to allocate VLANs, the number of users in each VLAN will be evenly divided.

Answer: B


NEW QUESTION # 337
As shown in the figure, R1 imports the direct route 10.1.1.0/24 to OSPF. An engineer enables bidirectional route re-advertisement on R2 and R3, and configures the following commands on R3. After the network becomes stable, which of the following is thePrevalue of the route 10.1.1.0/24 in the routing table of R4?

[R3]acl 2000
[R3-acl-basic-2000] rule permit source 10.1.1.0 0
[R3-acl-basic-2000] quit
[R3]route-policy hcip permit node 10
[R3-route-policy-10] if-match acl 2000
[R3-route-policy-10] apply preference 14
[R3-route-policy-10] quit
[R3]ospf 1
[R3-ospf-1] preference ase route-policy hcip

Answer: C

Explanation:
Let's analyze the process step-by-step:
R1redistributes thedirect route 10.1.1.0/24intoOSPF.
This OSPF route reachesR2andR3.
R2 and R3 are in an environment that usesIS-IStowardsR4.
BothR2 and R3 re-advertisethis OSPF route into IS-IS toward R4 (bidirectional route redistribution).
OnR3, aroute-policy named hcipis applied to controlASE (Autonomous System External) route preference.
The ACL matches the route10.1.1.0/24.
The route-policy sets thepreferenceof this ASE route to14.
InHuawei VRP, if a route-policy applied via preference ase route-policy matches a route, itmodifies the preferencevalue of the redistributed route when it is advertised.
By default:
OSPF ASE routeshave apreference of 150.
But in this case, due to the policy applied, the preference is explicitly changed to14on R3 before re- advertising to R4.
So,R4will install the route10.1.1.0/24from R3 withpreference 14, assuming R2 doesn't provide a better preference.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"You can control the preference of OSPF ASE routes by using a route-policy and applying it with the command preference ase route-policy. When the policy matches, the specified preference is used instead of the default (150)." (Chapter: OSPF Advanced Features - Section: Route Control and Inter-AS Route Redistribution)


NEW QUESTION # 338
Which of the following LSAs has a propagation range only in a single area? (Multiple choice)

Answer: C,D


NEW QUESTION # 339
Which of the following statements about the forwarding plane of a switch is false?

Answer: A


NEW QUESTION # 340
......

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