Download HCIP-Datacom-Advanced Routing & Switching Technology.H12-831.ExamTopics.2025-09-26.28q.vcex

Vendor: Huawei
Exam Code: H12-831
Exam Name: HCIP-Datacom-Advanced Routing & Switching Technology
Date: Sep 26, 2025
File Size: 998 KB
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Demo Questions

Question 1
When troubleshooting the EBGP neighbor relationship, you found that two directly connected devices use Loopback ports to establish a connection, so execute display current-configuration configuration bgp to view the configuration of peer ebgp-max-hop hop-count. Which of the following statements is correct?
  1. hop-count must be greater than 2
  2. hop-count must be greater than 15
  3. hop-count must be greater than 1
  4. hop-count must be greater than 255
Correct answer: C
Explanation:
C: 2 - Mosted
C: 2 - Mosted
Question 2
An enterprise purchased the leased lines of two operators. In order to optimize the route, the enterprise used the 6GP protocol to learn routing entries of the two operators. However, the company found that after such a configuration, the traffic of the export routing increased greatly. After the network engineering investigation, it was found that the traffic of the two operators was passed to each other through the company's export router.
Therefore, the company intends to use routing strategies to prevent the traffic between different operators from passing each other. Is the configuration in the figure correct?
  1. TRUE
  2. FALSE
Correct answer: A
Explanation:
A: 1B: 2 - Mosted
A: 1B: 2 - Mosted
Question 3
Which of the following statements about IS-IS (IPv6) is correct? (Choose three.)
  1. To support the processing and calculation of IPv6 routing, IS-IS added NLPID to 129 TLV
  2. IS-IS working at the data link layer only needs to add a new TLV to support Pv6
  3. To support the processing and calculation of IPv6 routes, IS-IS has added TLV232236
  4. By default, IS-IS enables the multi-topology feature
Correct answer: ABC
Explanation:
ABC: 1 - Mosted
ABC: 1 - Mosted
Question 4
In OSPF, ABR will convert all Type 7 LSAs in the NSSA area into Type 5 LSAs.
  1. TRUE
  2. FALSE
Correct answer: B
Explanation:
A: 1B: 1 - Mosted
A: 1B: 1 - Mosted
Question 5
Which of the following regarding the configuration description is wrong?
  1. If the DHCP request message received by the GigabitEthemnet0/0/1 interface does not contain the SutOption information of Option82, the device will generate Option82 and insert it into the message
  2. Enabling the DHCP Snooping configuration can be used to prevent DHCP Server counterfeiters from attacking
  3. Configure GigabitEthernet0/0/1 as a trusted interface
  4. Enabling the DHCP Snooping configuration can be used to prevent ARP spoofing attacks
Correct answer: D
Explanation:
A: 1 - Mosted
A: 1 - Mosted
Question 6
Regarding MP-BGP, which of the following description is incorrect?
  1. When the PE and CE exchange routes through BGP, you need to create a BGP process for each VPN instance on the CE
  2. MP-BGP's message type and VPNv4 routing policy are the same as BGP-4
  3. MP-BGP needs to assign private network labels to VPNv4 routes
  4. MP-BGP advertises VPNv4 routes through two attributes: MP_REACH_NLRI and MP_UREACH_NLRI
Correct answer: A
Explanation:
B: 2 - Mosted
B: 2 - Mosted
Question 7
Regarding the cause of the dual-master failure of the VRRP backup group, which of the following is the most unlikely?
  1. The link that transmits the VRRP notification message is faulty
  2. The low-priority VRRP backup group discards the received VRRP notification packets as illegal packets
  3. The VRRP backup group IDs on both ends are different
  4. Master device sends 1 notification message per second
Correct answer: D
Explanation:
B: 1 - MostedD: 1
B: 1 - MostedD: 1
Question 8
Configure under a certain interface: isis timer hello 5 leve1-2, which of the following statements is correct?
  1. The interval for sending Level-2 hello packets on this interface is 5s
  2. The hello packet sending interval of Level-1 and Leval-2 of this interface is 3s.
  3. The interval for sending Level-2 CSNP packets of this interface is 5s
  4. The interval for sending Level-1 hello packets on this interface is 5s
Correct answer: A
Question 9
Which of the following is wrong about DHCP Snooping?
  1. DHCP Snooping can prevent illegal attacks by setting trusted ports (all interfaces are untrusted by default)
  2. Enable DHCP Snooping globally, without any post parameters, the device only processes DHCPv4 messages by default
  3. Enable the DHCP Snooping function in the interface view, then all the DHCP message command functions under the interface will take effect
  4. Enable the DHCP Snooping function in the VLAN view, and the command function of DHCP messages belonging to the VLAN received by all interfaces of the device will take effect
Correct answer: A
Explanation:
B: 1 - Mosted
B: 1 - Mosted
Question 10
Regarding the IPSG, which of the following statement is incorrect?
  1. IPSG can prevent IP address spoofing attacks
  2. IPSG is a source IP address filtering technology based on the three-layer interface
  3. IPSG can turn on the IP packet inspection and alarm function, and cooperate with the network management to perform alarms
  4. IPSG can prevent the host from changing the IP address privately
Correct answer: B
Explanation:
A: 2 - MostedB: 1
A: 2 - MostedB: 1
Question 11
As shown in the figure, Site1 and Site2 need to achieve mutual access through the operator's BGP/MPLS IPVPN. It is known that the public network tunnel between PE1 and PE2 has been established (the label information is shown in the figure), and PF1 has advertised the 192.168.1.0/24 network segment route in Site1 to PE2 through the MP.JIBGP neighbor relationship, and the route learning is normal.
When capturing the data that Site2 visits the 192.168.1.0/24 of Site1 between P and PE1, what should be the outermost label?
  1. 6661
  2. 3
  3. 6662
  4. 8888
Correct answer: A
Explanation:
D: 2 - Mosted
D: 2 - Mosted
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