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| Section | Weight | Objectives |
|---|---|---|
| Advanced BGP Features | 10% | - Route reflector and attributes - BGP policy controls |
| Advanced IGP Features | 17% | - OSPF advanced capabilities - IS-IS advanced optimisations |
| IPv6 Routing | 20% | - OSPFv3/IS-IS for IPv6 - IPv6 static and dynamic routing |
| Network Cutover | 7% | - Migration planning techniques - Rollback procedures |
| Troubleshooting | 10% | - Issue resolution strategies - Network diagnostics |
| Network O&M | 7% | - Monitoring and health metrics - Operation & maintenance best practices |
| MPLS Technologies | 19% | - MPLS VPN basics - MPLS LDP and TE |
| Advanced Ethernet Technologies | 10% | - VLAN and Ethernet enhancements - MAC/security features |
>> H12-831_V1.0 Associate Level Exam <<
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NEW QUESTION # 143
The BGP protocol supports the use of the "filter-policy acl-number import" command to subtract the received routing information. The value range of acl-number is 2000~3999.
Answer: B
NEW QUESTION # 144
On the network shown in the figure , the network administrator deploys DHCP snooping on the switch to defend against bogus DHCP server attacks .
Which of the following interfaces should be configured as the DHCP trusted interface?
Answer: C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding DHCP Snooping and Trusted/Untrusted Ports
1. What is DHCP Snooping?
* DHCP Snooping is a security feature that prevents rogue DHCP servers from providing unauthorized IP configurations to clients.
* It categorizes switch ports into:
* Trusted Ports: Allow DHCP Offer and ACK messages from a legitimate DHCP server.
* Untrusted Ports: Block unauthorized DHCP responses to prevent rogue DHCP attacks.
Analyzing the Network Setup in the Figure
Interface
Connected Device
DHCP Role
Should it be Trusted?
GE0/0/1
PC1 (DHCP Client)
Requests DHCP leases
# Untrusted
GE0/0/2
DHCP Server (Legitimate)
Provides DHCP leases
# Trusted
GE0/0/3
Web Server
Not involved in DHCP
# Untrusted
GE0/0/4
Bogus (Rogue) DHCP Server
Malicious DHCP Server
# Untrusted & Blocked
* GE0/0/2 is connected to the legitimate DHCP server, meaning it should be marked as a TRUSTED interface.
* GE0/0/4 connects to a bogus DHCP server, which must be UNTRUSTED to block unauthorized DHCP responses.
* GE0/0/1 (Client) and GE0/0/3 (Web Server) do not need to be trusted.
# Thus, the correct answer is: D. GE0/0/2.
Final Conclusion:
# GE0/0/2 should be configured as the trusted DHCP interface.
# GE0/0/1 (Client) should remain untrusted.
# GE0/0/3 (Web Server) does not need DHCP trust.
# GE0/0/4 (Bogus DHCP Server) should be blocked.
Thus, the correct answer is: D. GE0/0/2 .
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - DHCP Snooping Configuration and Security Mechanisms Huawei Official HCIP-Datacom Study Guide - Preventing DHCP Server Spoofing with DHCP Snooping Huawei Documentation on Configuring Trusted and Untrusted Ports for DHCP Snooping
NEW QUESTION # 145
A campus deploys OSPF to implement network interworking. The LSDB of R2 is shown in the figure. From this LSDB. it is possible to What information was obtained?
Answer: A,D
NEW QUESTION # 146
In a BGP/MPLS IP VPN network, PE devices will update VPN routes through Update messages.
Which of the following information will be included in the Update message? (Multiple choice)
Answer: A,C,D
NEW QUESTION # 147
For the same MA, C address, manually configured MA, C entries have higher priority than automatically generated entries.
Answer: A
NEW QUESTION # 148
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