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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIP-Datacom-Advanced Routing & Switching Technology V1.0 |
| Exam Number: | H12-831_V1.0-ENU |
| Exam Format: | Case-based questions, Multiple-choice questions, Single-choice questions, Drag and drop |
| Exam Price: | $200 USD (varies by region) |
| Certificate Validity Period: | 3 years |
| Passing Score: | 600/1000 |
| Related Certifications: | HCIP-Datacom HCIA-Datacom |
| Available Languages: | English, Chinese |
| Real Exam Qty: | 60-70 |
| Exam Duration: | 90 minutes |
| Recommended Training: | HCIP-Datacom Official Training |
| Exam Registration: | Huawei Certification Official Portal |
| Sample Questions: | Huawei H12-831_V1.0 Sample Questions |
| Exam Way: | Online proctored exam or authorized testing center (onsite) |
| Pre Condition: | Recommended completion of HCIA-Datacom or equivalent networking knowledge |
| Official Syllabus URL: | https://e.huawei.com/en/talent/ |
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NEW QUESTION # 146
In the network shown in the figure, R1 and R2 have established an EBGP neighbor relationship through the Loopback0 interface. R1 introduces the route 2001::1/128 into BGP. In the Update message sent by R1, the value of the Next Hop field in MP_REACH_RI is 2000::1.
Answer: B
NEW QUESTION # 147
Which of the following operations does not need to be performed when a network engineer handles a single- hop BFD session down event?
Answer: B
Explanation:
Bidirectional Forwarding Detection (BFD) rapidly detects forwarding-path failures between network devices.
When a single-hop BFD session enters the Down state, troubleshooting should focus on connectivity, session configuration, and BFD packet exchanges.
Checking the local and remote discriminators helps identify configuration mismatches that prevent session establishment. Examining BFD packet statistics helps determine whether control packets are being transmitted and received. Ping testing can identify basic IP connectivity problems.
However, checking whether a static route bound to BFD remains in the routing table is not necessary to diagnose why the BFD session went Down. The route may have been withdrawn as a consequence of the BFD failure.
Therefore, the appropriate answer is C. Huawei ' s BFD troubleshooting procedures prioritize session configuration, packet statistics, and link connectivity.
NEW QUESTION # 148
A network engineer provides a troubleshooting report after rectifying a fault. The actual network is simplified into the one shown in the figure, where:
* R1 and R2 both have OSPF enabled.
* R1 and R2 function as the gateways for PC1 and PC2, respectively.
Given this, which of the following statements are true?
Options:
Answer: A,B,C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding the Network Topology
* R1 and R2 are OSPF-enabled routers connected via the 10.0.12.0/24 subnet (Area 0).
* PC1 (192.168.1.2/30) is connected to R1 via GE0/0/1.
* PC2 (192.168.1.22/30) is connected to R2 via GE0/0/1.
* OSPF ensures that R1 and R2 know about each other's directly connected networks.
2. Analyzing Connectivity
* Can R1 ping 192.168.1.22 (PC2)?
* Yes, if routing is properly configured.
* OSPF ensures that R1 learns about 192.168.1.22 from R2.
* Since R1 has a route to 192.168.1.22 via R2, it can ping PC2 successfully.
* # Option A is correct.
* Can R1 ping 192.168.1.21 (R2's interface)?
* Yes, since R1 and R2 are OSPF neighbors.
* R1 learns 192.168.1.21 via OSPF and can reach it directly.
* # Option B is correct.
* Can R2 ping 192.168.1.2 (PC1)?
* Yes, since OSPF ensures that R2 learns about 192.168.1.2 from R1.
* Since R2 has a route to 192.168.1.2 via R1, it can ping PC1 successfully.
* # Option C is correct.
* Can PC1 and PC2 ping each other?
* Yes, if default gateways and routing are configured correctly.
* If R1 and R2 can ping each other and forward packets, PC1 and PC2 should be able to communicate.
* # Option D is incorrect because PC1 and PC2 should be able to ping each other.
Final Answer:
# A, B, and C are correct.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* OSPF Inter-Router Communication and Route Advertisement
* Default Gateway and Routing in Multi-Router Networks
* Troubleshooting End-to-End Connectivity in Routed Networks
NEW QUESTION # 149
Which of the following statements about IPSG is false?
Answer: A
NEW QUESTION # 150
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,C
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 # 151
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