- Exam Code: H12-821_V1.0-ENU
- Exam Name: HCIP-Datacom-Core Technology V1.0
- Updated: Aug 30, 2026
- Q & A: 1081 Questions and Answers
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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Reliability Basics | 8% | - BFD and fault detection - High availability design - VRRP and redundancy |
| Topic 2: Large-scale WLAN Networking Architecture | 6% | |
| Topic 3: Network Solutions | 2% | |
| Topic 4: BGP Core Knowledge | 17% | - BGP route selection and control - BGP concepts and attributes - BGP deployment and optimization |
| Topic 5: Network Service and Management | 2% | |
| Topic 6: IPv6 Core Knowledge | 3% | - IPv6 addressing and header - IPv6 routing protocols |
| Topic 7: OSPF Core Knowledge | 16% | - OSPF route calculation and selection - OSPF configuration and troubleshooting - OSPF principles and operation |
| Topic 8: Routing Basics | 3% | |
| Topic 9: IS-IS Core Knowledge | 8% | - IS-IS protocol fundamentals - IS-IS routing and configuration |
| Topic 10: Routing and Traffic Control | 10% | - Traffic engineering and control - Routing policy and filtering |
| Topic 11: Multicast Basics | 9% | - IGMP and PIM protocols - Multicast principles |
| Topic 12: Network Security Basics | 9% | - AAA and access control - ACL and packet filtering - Security defense technologies |
| Topic 13: Switching Core Knowledge | 7% | - Spanning Tree Protocol - Link aggregation - VLAN and trunking |
Question 1
Regarding the description of IGMP Snooping-working mechanism, which is the correct?
A. If the host sends an IGMP leave message, the switch will add the host to the corresponding multicast table.
B. The layer 2 switch establishes and maintains the PIM routing table on the layer 2 by continuously monitoring IGMP messages.
C. When IGMP Snooping is not running, the multicast message will be broadcast on the second layer.
After running IGMP Snooping, the message will no longer be broadcast on the second layer, but will be multicast on the second layer.
D. If the host sends an IGMP host report message, the switch will delete the multicast entry corresponding to the hos.t
Question 2
Which of the following does not include the advantages of address translation technology?
A. Address translation can handle the case of IP header encryption
B. Address translation can shield users on the internal network and improve the security of the internal network.
C. Address translation allows internal network users (private IP addresses) to easily access the Internet
D. Address translation can enable many hosts in the internal office network to share a P address for accessing the Internet.
Question 3
What is the aging time of the router port defined in IGMP Snooping?
A. 180
B. 120
C. 150
D. 90
Question 4
OSPF supports multiple processes. Multiple different OSPF processes can run on the same router.
They do not affect each other and are independent of each other. The routing interaction between different OSPF processes is equivalent to the routing interaction between different routing protocols.
A. TRUE
B. FALSE
Question 5
Which of the following BGP routing attributes is not a recognized attribute?
A. Local_Pref
B. Origin
C. AS_ PATH
D. MED
Solutions:
| Question 1 Answer: C | Question 2 Answer: A | Question 3 Answer: A | Question 4 Answer: A | Question 5 Answer: D |
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