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Huawei H12-891_V1.0 (HCIE-Datacom V1.0) Certification Exam is a challenging exam that requires a significant amount of preparation. Candidates are expected to have a deep understanding of data communication technologies, including network protocols, routing, switching, and security. They should also be familiar with the latest industry trends and best practices. To pass the exam, candidates must demonstrate their ability to design, implement, and troubleshoot complex data communication networks.

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Huawei HCIE-Datacom V1.0 Sample Questions (Q139-Q144):

NEW QUESTION # 139
In which of the following cases, RSTP refreshes the MAC address table?( Multi-select)

A. CE when the port state transitions from Disking to Forwarding
B. Only when the port state transitions from Listening to Disccarding
C. When the port state transitions from Forwarding to Disking
D. When a topology change notification is received
E. When the status of a port changes

Answer: A,D

NEW QUESTION # 140
Man-in-the-middle attacks (MITM) or IP/MAC Spoofing attacks are common on intranets and can cause information leakage.
Which configuration method can prevent these attacks?

A. Configure the trusted or untrusted interface.
B. Configure association between DHCP snooping and IPSG or DAI on the switch.
C. Limit the maximum number of MAC addresses that can be learned on a switch interface.
D. Configure DHCP snooping to check the CHADDR field carried in a DHCP Request packet.

Answer: B

Explanation:
Comprehensive and Detailed Explanation:
# The Best Protection Against MITM and Spoofing Attacks:# (D) Associating DHCP Snooping with IPSG (IP Source Guard) and DAI (Dynamic ARP Inspection) provides complete protection by:
* Blocking rogue DHCP servers.
* Preventing MAC/IP spoofing.
* Ensuring only valid clients access the network.
# Why Not Other Options?# (A) Configuring trusted/untrusted interfaces only helps block rogue DHCP servers, but does not prevent spoofing.# (B) Limiting MAC address learning prevents MAC flooding, but does not stop MITM attacks.# (C) Checking the CHADDR field in DHCP Snooping helps detect spoofed requests, but does not block all MITM scenarios.
# Reference: Huawei HCIE Datacom - Security Mechanisms for Intranet Protection

NEW QUESTION # 141
Network managers can use CAR technology in traffic policing. What of the following technologies can be applied in CAR?

A. Single barrel single speed
B. Double barrel two-speed
C. Double barrel single speed
D. Three barrels of single quick

Answer: B,C

NEW QUESTION # 142
When the load is an ICMPv6 message, what is the numeric value of the Next Header field in the IPv6 header if the presence of an extended header is not taken into account?

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

Answer: A,C,D

NEW QUESTION # 143
Which of the following options enables encapsulation and unencapsulation of VXLAN messages?

A. BD
B. VLANIF
C. VBDIF
D. VTEP

Answer: D

NEW QUESTION # 144
......

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2025 Newest 100% Free H12-891_V1.0–100% Free Latest Exam Pattern | HCIE-Datacom V1.0 Study Dumps

H12-891_V1.0 Study Dumps | Exam H12-891_V1.0 Sample

Huawei HCIE-Datacom V1.0 Sample Questions (Q139-Q144):

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