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[General] How Can I Prepare H12-891_V1.0 Exam Questions In One Week? [2026]

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【General】 How Can I Prepare H12-891_V1.0 Exam Questions In One Week? [2026]

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Huawei HCIE-Datacom V1.0 Sample Questions (Q192-Q197):NEW QUESTION # 192
Assume that BGP/MPLSIPVVPN, OSPF, LDP, and static routing protocols are already enabled on the PE router . Which of the following protocols need to enable GR on PE in order to get NSF functionality?
(Multiple choice questions).
  • A. Static circuit
  • B. MPLS LDP
  • C. BGP
  • D. OSPF
Answer: B,C,D

NEW QUESTION # 193
To allow only authorized users (users who obtain IP addresses through authorized DHCP servers or use specified static IP addresses) to access the network shown in the figure, which of the following solutions can be used?

  • A. DAI + IPSG
  • B. DHCP Snooping + DAI
  • C. DHCP Snooping + IPSG
  • D. DAI + Port Security
Answer: C
Explanation:
Understanding Network Security for Authorized User Access
#Problem Scenario:
Only authorized users should be allowed network access.
Users can obtain IP addresses either via DHCP or a predefined static IP list.
Unauthorized users (e.g., attackers using rogue DHCP servers or spoofed IPs) must be blocked.
#Required Technologies for Securing Access:
1##DHCP Snooping- Protects againstrogue DHCP serversand builds abinding table of legitimate DHCP clients.
2##IP Source Guard (IPSG)- Ensures that onlyauthorized IP-MAC bindingscan send traffic.
Analysis of the Answer Choices:
#A. DAI + Port Security (Incorrect)
DAI (Dynamic ARP Inspection)prevents ARP spoofingbut doesnot validate IP-MAC-DHCP bindings.
Port Securityonlylimits MAC addresses per portbut doesnot verify IP addresses.
Does NOT protect against unauthorized static IP users.
#B. DHCP Snooping + IPSG (Correct)
DHCP Snooping:
Preventsrogue DHCP servers from assigning unauthorized IPs.
Builds aDHCP binding table(IP-MAC-Port).
IP Source Guard (IPSG):
Blocks trafficfrom IPs not listed in the DHCP snooping binding table.
Can be configured to allow manually specified static IP addresses.
Best choice to allow only authorized users (both DHCP and static IP users).
#C. DHCP Snooping + DAI (Incorrect)
DAI (Dynamic ARP Inspection) prevents ARP spoofingbutdoes not block unauthorized static IP users.
Lacks IP-level access controlneeded to enforce static IP policies.
#D. DAI + IPSG (Incorrect)
IPSG (IP Source Guard) needs DHCP Snooping to build the binding table.
Without DHCP Snooping, IPSG cannot function properly.
DAI does not provide complete protection against unauthorized users.
Why is the Answer B (DHCP Snooping + IPSG)?
#Ensures only users assigned a DHCP IP (or authorized static IPs) can send traffic.
#Blocks rogue DHCP servers and unauthorized static IP users.
Real-World Application:
Enterprise Networksrevents unauthorizedstatic IP users or attackers from accessing VLANs.
Public Wi-Fi Security:Ensures onlyauthorized users receive IPs and can send traffic.
#Reference:Huawei HCIE-Datacom Guide - DHCP Snooping and IPSG Security Mechanisms

NEW QUESTION # 194
A company network runs the OSPF protocol, a project in order to understand the OSPF mechanism in the network to perform packet transfer operations, the following description of ospf messages is correct?
  • A. When an LsUpdate packet is received, the router must send an LsAck acknowledgment
  • B. LS update packet is sent only when the adjacency relationship is established
  • C. The interface sends a Hello packet immediately after joining the OSPF region
  • D. LS update packet synchronizes the link state database by sending detailed LSA information
    2
Answer: C,D

NEW QUESTION # 195
In thesmall and midsize campus network designbased on theHuawei CloudCampus Solution, when over100 branchesneed to communicate with each other, which of the following interconnection networking models is recommended?
  • A. Partial-mesh networking
  • B. Direct networking
  • C. Full-mesh networking
  • D. Hub-spoke networking
Answer: D
Explanation:
Comprehensive and Detailed Explanation:
#Hub-Spoke networkingis the mostefficient and scalablemodel for interconnecting100+ branchesin asmall and midsize campus network.
#Why Hub-Spoke?
Centralized Control:Ahub routermanages communication betweenspoke routers(branch sites).
Reduced Complexity:Unlikefull-mesh, which requiresN(N-1)/2* connections,hub-spoke minimizes link costs.
Easier Managementolicy enforcement and security are centralized at thehub site.
#Why Not Other Options?
#A (Direct Networking)# Suitable forsmall networks, but inefficient for100+ branches.
#B (Full-Mesh Networking)# Highcost and complexity, requiringtoo many links.
#D (Partial-Mesh Networking)# More scalable thanfull-mesh, buthub-spoke is more optimizedfor large branch networks.
#Reference:Huawei HCIE Datacom - WAN Interconnection Models

NEW QUESTION # 196
Is the following figure correct about NDP's process of resolving link-layer addresses?

  • A. Wrong
  • B. Right
Answer: B

NEW QUESTION # 197
......
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