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Huawei H12-831_V1.0 (HCIP-Datacom-Advanced Routing & Switching Technology V1.0) Certification Exam is a comprehensive test that evaluates the knowledge and skills of IT professionals in advanced routing and switching technologies. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification is designed to equip professionals with the necessary skills to design, deploy, and maintain complex networks using Huawei routing and switching products. H12-831_V1.0-ENU Exam covers a wide range of topics, including network design principles, routing protocols, network security, and advanced switching technologies.
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Huawei H12-831_V1.0 (HCIP-Datacom-Advanced Routing & Switching Technology V1.0) Exam is a certification that focuses on advanced networking and switching technology. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification is designed for IT professionals who want to deepen their understanding of data communication, routing, and switching. It is recommended for network engineers, network administrators, and network architects who want to enhance their skills and knowledge in managing enterprise-level networks.
NEW QUESTION # 76
On the IS-IS IPv6 network shown in the figure, after the network becomes stable:
* R1 can ping 2000:12::0 , and
* The display ipv6 neighbors command can be used to display the MAC address corresponding to
2000:12::0 .
Is this statement TRUE or FALSE?
Answer: B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the IPv6 Addressing and IS-IS Network
* IPv6 Addressing in the Figure:
* R1 has the address: 2000:12::1/64
* R2 has the address: 2000:12::0/127
* The link between them is using a /127 subnet (2000:12::0/127).
* Behavior of IPv6 /127 Subnet Mask
* In IPv6, a /127 prefix is commonly used on point-to-point links to avoid the issue of subnet- router anycast (::0) .
* RFC 6164 recommends using /127 instead of /64 for point-to-point links to reduce unnecessary anycast behavior .
* 2000:12::0 is the network address (first address in the subnet) and is not assigned to an interface .
Analyzing the Two Statements in the Question
Statement 1: " R1 can ping 2000:12::0 " # (Incorrect)
* In IPv6, the first address (::0) in a /127 subnet is typically reserved as a network address and not assigned to any router .
* R1 cannot ping 2000:12::0 because it is not assigned to R2 as an active IP.
* Correct ping targets would be:
* R1 pinging R2's actual address (2000:12::1 or 2000:12::2 depending on numbering).
Statement 2: " display ipv6 neighbors command can be used to display the MAC address corresponding to 2000:12::0 " # (Incorrect)
* The display ipv6 neighbors command is used to show the MAC address of an active neighbor (i.e., a reachable device).
* Since 2000:12::0 is not assigned to a specific router , it will not have a MAC address in the neighbor table .
Final Conclusion:
# R1 cannot ping 2000:12::0 because it is the network address in a /127 subnet.
# The display ipv6 neighbors command cannot show a MAC address for 2000:12::0 because it is not assigned to a router.
Thus, the correct answer is: B. FALSE .
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - IPv6 Addressing and IS-IS for IPv6 Huawei Official HCIP-Datacom Study Guide - IPv6 Neighbor Discovery and Point-to-Point Links RFC 6164 - Using 127-Bit IPv6 Prefixes on Inter-Router Links
NEW QUESTION # 77
In the hub-spoke networking shown in the figure, the Hub-PE can be configured to allow repetitive local AS numbers for correct route transmission.
Is this statement TRUE or FALSE?
Options:
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding the Hub-Spoke BGP Design
* Hub-Spoke topology is commonly used in MPLS Layer 3 VPNs, where:
* Hub-PE acts as a central router.
* Spoke-PEs connect to the hub but do not communicate directly with each other.
* eBGP (External BGP) is used between the Hub-PE and Spoke-PE routers.
2. The Role of AS Numbers in BGP Route Transmission
* By default, BGP prevents routes from being sent back to the same AS (Autonomous System) to avoid loops (via the AS_PATH loop prevention mechanism).
* However, in a Hub-Spoke MPLS VPN, the Hub-PE must be allowed to re-advertise routes learned from one spoke to another spoke.
* This requires allowing repetitive AS numbers within the same AS to avoid BGP rejecting valid routes.
3. Solution: Using "Allow-AS Loop" on the Hub-PE
* The allowas-in or allow-as-loop command must be used on Hub-PE to allow repetitive local AS numbers.
* This ensures that routes from Spoke-PE1 (AS65002) are advertised to Spoke-PE2 (AS65003) via Hub-PE, even if AS numbers are repeated.
Example Configuration on Hub-PE:
plaintext
CopyEdit
bgp 65001
peer Spoke-PE1 allow-as-loop 2
peer Spoke-PE2 allow-as-loop 2
* This allows Hub-PE to accept and propagate routes even if the AS number appears more than once.
4. Evaluating the Answer Choices
Option
Correct?
Reasoning
A: TRUE
# Correct
Hub-PE can be configured to allow repetitive AS numbers using the allow-as-loop feature.
B: FALSE
# Incorrect
BGP by default prevents repeated AS numbers, but this can be overridden.
# Correct answer: A. TRUE
Final Conclusion:
* By default, BGP prevents AS loopbacks.
* Hub-PE needs to allow repetitive AS numbers for proper route transmission in the hub-spoke model.
* The "allow-as-loop" command enables this functionality.
* Thus, the correct answer is: TRUE.
NEW QUESTION # 78
Which of the following is not added for IS-IS to support IPv6 route processing and calculation?
The source IP address of IS-IS Hello packets is changed to the link-local address.
TLV 232, which is equivalent to the IP Interface Address TLV in IPv4, except that the original 32-bit IPv4 address is changed to a 128-bit IPv6 address.
Answer: B
Explanation:
The option lettering in the supplied question is malformed. In the standard option order, the source-IP statement is option B, and it is the item that was not added for IS-IS IPv6.
Unlike OSPFv3, IS-IS operates directly over the data-link layer rather than being encapsulated in IPv4 or IPv6. Consequently, an IS-IS Hello PDU does not have an IP header or an IP source address that could be changed to an IPv6 link-local address.
To support IPv6 route processing, IS-IS was extended with the following information:
* TLV 232 - IPv6 Interface Address: Carries one or more 128-bit IPv6 interface addresses.
* TLV 236 - IPv6 Reachability: Carries IPv6 prefixes, metrics and reachability attributes.
* IPv6 NLPID: The value 142 (0x8E) identifies IPv6 as a supported network-layer protocol and is carried when IPv6 reachability is advertised.
Therefore, TLV 232, TLV 236 and the IPv6 NLPID are valid IS-IS IPv6 extensions. Changing an IS-IS Hello packet's source IP address is not one of them. Huawei IS-IS documentation
NEW QUESTION # 79
A campus has deployed IPv6 for service testing. There are 4 routers (R1, 22, R3 and R4) in this network, running 0SPFV3 to realize the interconnection of IPv6 network. A new router R5 needs to be connected to the network for testing. An engineer introduces a direct route in the OSPFVV3 process of R4 so that devices in the campus network can access the GE0/0/1 port address of R5. Which of the following statements about the scene is true of?
Answer: B,C,D
NEW QUESTION # 80
On the network shown in the figure, the DHCP server function is enabled on GE0/0/0 of R2, and the address pool is an interface address pool. When GE0/0/0 and GE0/0/1 of R1 function as DHCP clients, only one interface can obtain an IP address by default.
Answer: A
NEW QUESTION # 81
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