H12-821_V1.0考試備考經驗，H12-821_V1.0指南

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Huawei H12-821_V1.0 Exam Syllabus Topics:

Section	Objectives
Topic 1: Routing Basics	- IP Routing Fundamentals 1. Route Selection 2. Static Routing 3. Routing Table Principles
Topic 2: Network Solutions	- Enterprise Network Solutions 1. WAN Solution 2. Campus Network 3. Datacom Architecture
Topic 3: OSPF	- OSPF Fundamentals 1. OSPF Neighbor Relationship 2. LSA and SPF Calculation 3. OSPF Area Design
Topic 4: Network Service and Management	- O&M Technologies 1. SNMP 2. Telemetry 3. Network Monitoring
Topic 5: Multicast	- IP Multicast Technologies 1. IGMP 2. PIM 3. Multicast Forwarding
Topic 6: Routing and Traffic Control	- Traffic Management 1. Route Filtering 2. Traffic Optimization 3. Policy-based Routing
Topic 7: IPv6	- IPv6 Fundamentals 1. IPv6 Routing 2. IPv4 to IPv6 Transition 3. IPv6 Addressing
Topic 8: IS-IS	- IS-IS Fundamentals 1. IS-IS Neighbor Establishment 2. LSP and SPF Mechanism 3. Level-1 and Level-2 Routing
Topic 9: WLAN	- Wireless Networking 1. WLAN Architecture 2. Wireless Security 3. WLAN Deployment
Topic 10: BGP	- BGP Technologies 1. BGP Path Selection 2. BGP Route Advertisement 3. IBGP and EBGP
Topic 11: Network Security	- Security Technologies 1. ACL 2. AAA 3. Attack Prevention
Topic 12: Ethernet Switching Technology	- Switching Fundamentals 1. STP/RSTP/MSTP 2. VLAN 3. Link Aggregation
Topic 13: Network Reliability	- Reliability Technologies 1. Redundancy Design 2. VRRP 3. BFD

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最新的 HCIP-Datacom H12-821_V1.0 免費考試真題 (Q179-Q184):

問題 #179
A wide area network (WAN) is a remote network that connects local area networks (LANs) or metropolitan area networks (MANs) in different areas for communication purposes. It is typically used to interconnect campus networks or data center networks.

A. TRUE
B. FALSE

答案：A

解題說明：
Comprehensive and Detailed Step-by-Step Explanation:
* WAN Definition:
* A WAN is a large-scale network spanning a wide geographical area, connecting smaller networks such as LANs and MANs.
* Use Cases:
* WANs are commonly used for interconnecting campus networks, branch offices, and data centers over long distances.
* Correct Statement:
* The statement accurately describes the purpose and scope of WANs.
References:
* HCIA-Datacom Study Guide, Chapter: WAN Fundamentals
* Huawei Networking Basics

問題 #180
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

A. 0
B. 1
C. 2
D. 3

答案：B

解題說明：
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)

問題 #181
When dual-link hot backup is configured in a WLAN group, the AP will establish CAPWAP links with the primary AC and backup AC respectively.

A. TRUE
B. FALSE

答案：A

問題 #182
Which of the following statements about WLAN roaming are false?

A. APs with which a STA is associated before and after roaming can work on different channels.
B. During roaming, the STA sends an Association Request frame containing home AP information to the foreign AP.
C. During roaming, the STA sends a Reassociation Request frame containing home AP information to the foreign AP.
D. APs with which a STA is associated before and after roaming must work on the same channel.

答案：B,D

解題說明：
During WLAN roaming, the STA sends aReassociation Requestframe to the foreign AP to maintain connectivity. Association frames are used during initial connections, not roaming.
APs with which a STA is associated before and after roaming can work on different channels, as roaming often occurs across channels in environments like multi-SSID or multi-channel setups.
Options C and D are false, as they contradict standard WLAN roaming procedures .

問題 #183
In the network shown in the figure, all switches run the RSTP protocol. If the E1 interface of SWB fails, the RSTP processing process: (Multiple choice)

A. On all non-edge forwarding ports, send a topology change notification (Topology Change notification) to notify other switches that a topology change has occurred in the network
B. Recalculate the spanning tree, and SWB elects E2 as the new root port
C. SWB deletes the port entry of the port with the purpose of E1 in the MAC address table
D. Send topology change notifications (Topology Change notification) on all forwarding ports to notify other switches that topology changes have occurred in the network

答案：A,B,C

問題 #184
......

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