- Exam Code: H12-821_V1.0-ENU
- Exam Name: HCIP-Datacom-Core Technology V1.0
- Updated: Jul 23, 2026
- Q & A: 1081 Questions and Answers
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| Section | Objectives |
|---|---|
| IP Network Fundamentals | - TCP/IP Model and Networking Principles - IPv4 and IPv6 Addressing |
| Network Services and QoS | - QoS Mechanisms and Traffic Management - Network Reliability and Redundancy |
| Routing Protocols | - BGP Basics and Policy Control - IS-IS Fundamentals - OSPF Implementation and Optimization |
| MPLS and VPN Technologies | - MPLS Architecture and Label Switching - L2VPN and L3VPN Deployment |
| Network Management and Automation | - Basic Network Automation Concepts - Network Monitoring and O&M Tools |
1. Which of the following descriptions about BGP loop protection is correct? (Multiple choice)
A) A BGP router will not announce any updates from EBGP peers to its EBGP peers
B) Any routing information from an IBGP peer will be advertised to other IBGP peers
C) Through the AS-PATH attribute, discard any update information received from the EBGP peer that contains its own AS number in the AS-PATH attribute
D) Non-RR BGP routers will not announce any updates from IBGP peers to other IBGP peers
2. Routers R1 and R2 are directly connected through GigabitEthernet0/0/0 respectively, and try to establish an OSFP neighbor relationship, but the neighbor relationship has not been successfully established. The troubleshooting process is shown in the figure.

So which of the following operations can make R1 and R2 neighbor management established normally?
A) [R2] ospf 1 [R2-ospf-1] area0
[R2-ospf=1-area-0,0.0.0lundotimer hello
B) [R2] interface GigabitEthernet 0/0/0
[R2-GigabitEtherneto/0/0] undo ospf timer hello
C) [R2] ospf 1 [R2-0spf-1] ara0
[R2-ospf-1-area-0.0.0.0] timer hello 10
D) [Relintertace GigabitEthernet 0/0/0
[R2-GigabitErhernet0/0/0] ospf timer hello 20
3. The shortest path from the multicast source to the receiver is called the shortest path tree SPT.
A) TRUE
B) FALSE
4. Which of the following descriptions of multicast routing are correct? (Multiple choice)
A) Multicast routing protocols are divided into intra-domain multicast routing protocols and inter-domain multicast routing protocols.
B) If an upstream neighbor or downstream neighbor on the multicast distribution tree is unreachable, multicast routing will re-converge.
C) Multicast routing protocols include IGMP protocol
D) Multicast routing protocols are used to establish and maintain multicast routes, and forward multicast packets correctly and efficiently.
5. Please match the following BGP attribute names with their attribute categories. (Drag and drop)
Solutions:
| Question # 1 Answer: C,D | Question # 2 Answer: D | Question # 3 Answer: A | Question # 4 Answer: A,B,D | Question # 5 Answer: Only visible for members |
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