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The HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification exam covers a range of topics such as MPLS VPN technologies, BGP, OSPF, IPv6, QoS, and advanced switching technologies. H12-831_V1.0 exam is designed to test the candidate's understanding of the concepts, protocols, and technologies related to advanced routing and switching. Passing H12-831_V1.0 exam indicates that the candidate has the skills and expertise required to design and implement complex network solutions using Huawei devices. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification is highly valued by employers as it demonstrates the candidate's ability to work with advanced networking technologies and solutions.
Huawei H12-831_V1.0 (HCIP-Datacom-Advanced Routing & Switching Technology V1.0) Certification Exam is a professional-level certification designed for individuals who want to demonstrate their expertise in advanced routing and switching technologies. H12-831_V1.0 exam covers a range of topics and is designed to test a candidate's ability to design, configure, and troubleshoot complex networks using these technologies. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification is highly valued in the industry and is particularly beneficial for individuals who work in large enterprises or service providers.
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NEW QUESTION # 14
In the network shown in the figure, R1 and R2 establish an EBGP neighbor relationship through a directly connected interface, and the BFD function is enabled in the BGP process. The BFD parameters are "bfd min-tx-interva1 1000min-rx-interva1 1000 detect-multiplier6". If the IP address of R2's GE0/0/0 interface is deleted, and the BGP neighbor relationship is checked on R1, which of the following is the longest time for the R1 BGP neighbor relationship to change from Up to Down?
Answer: C
NEW QUESTION # 15
The figure shows the Router-LSA generated by a router. Which of the following statements are true based on the LSA?
Answer: B,D
NEW QUESTION # 16
A network engineer entered the following information when troubleshooting OSPF faults. Based on this, you can judge what causes the adjacency relationship to fail to be established normally?
Answer: C
NEW QUESTION # 17
On the network shown in the figure, the network administrator configures the DHCP snooping trust function on the switch.
* GE0/0/2 is a trusted interface (connected to the DHCP Server).
* GE0/0/3 is an untrusted interface (potential attacker).
Which of the following statements are true about the two interfaces?
Options:
Answer: A,B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding DHCP Snooping
DHCP Snooping is a security feature that filters untrusted DHCP messages to prevent attacks such as:
* Rogue DHCP servers distributing incorrect IP addresses.
* DHCP starvation attacks.
In DHCP Snooping, switch ports are classified as:
* Trusted Interfaces: Allow both DHCP requests and DHCP responses to pass through.
* Untrusted Interfaces: Allow only DHCP requests but drop DHCP responses (to prevent rogue DHCP servers).
2. Analyzing Each Answer Option
* Option A: "When receiving a DHCP response packet on GE0/0/2, the switch forwards the packet through GE0/0/1."
* Correct.
* GE0/0/2 is a trusted interface (connected to the DHCP server).
* DHCP responses (ACK, NAK, OFFER) come from the DHCP Server.
* Since DHCP responses are allowed on trusted interfaces, the switch forwards them to the client (PC1) via GE0/0/1.
* Option B: "When receiving a DHCP request packet on GE0/0/2, the switch forwards the packet through GE0/0/3."
* Incorrect.
* DHCP requests originate from clients (PC1, attackers, etc.), not from the DHCP server.
* The DHCP request should be forwarded to the DHCP server via a trusted interface (not GE0/0
/3, which is untrusted).
* Option C: "When receiving a DHCP response packet on GE0/0/3, the switch forwards the packet through GE0/0/1."
* Incorrect.
* GE0/0/3 is an untrusted interface (connected to the attacker).
* DHCP responses (ACK, OFFER) from untrusted interfaces are dropped to prevent rogue DHCP attacks.
* The switch will not forward the packet.
* Option D: "When receiving a DHCP request packet on GE0/0/3, the switch forwards the packet through GE0/0/2."
* Correct.
* DHCP requests originate from clients (PC1 or attacker).
* Since DHCP requests are allowed on untrusted interfaces, the switch forwards them to the DHCP server via the trusted interface (GE0/0/2).
Final Answer:
# A and D are correct.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* DHCP Snooping and Port Trust Classification
* How Trusted and Untrusted Ports Handle DHCP Packets
* Preventing Rogue DHCP Servers Using DHCP Snooping
NEW QUESTION # 18
The AS Path attribute is the private attribute of BGP. The if-match as-path-filter command is applicable only to BGP routes
Answer: B
Explanation:
The AS_Path attribute records the autonomous systems through which a BGP route has passed. Huawei documentation describes it as a "private attribute of BGP," meaning a BGP-specific route attribute. It is used for loop prevention, route selection and policy-based filtering.
The if-match as-path-filter command creates a route-policy matching condition based on an AS_Path filter.
Because non-BGP routes do not carry the BGP AS_Path attribute, this matching clause applies only to BGP routes. Before configuring the matching clause, an AS_Path filter should be defined with the ip as-path-filter command. For example:
ip as-path-filter 2 permit _200_300
route-policy test permit node 10
if-match as-path-filter 2
This policy node matches BGP routes whose AS_Path satisfies the configured regular expression. Huawei's
"private attribute" wording should be understood as protocol-specific , not as saying that AS_PATH is an optional proprietary attribute; in standard BGP classification, AS_PATH is a well-known mandatory path attribute.
Huawei's command reference explicitly states that if-match as-path-filter is applicable only to BGP routes.
Huawei if-match as-path-filter reference
NEW QUESTION # 19
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