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Last Updated: Sep 20, 2026
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Huawei H12-221-ENU Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: IS-IS Routing Protocol | 18% | - IS-IS link state database and route calculation - IS-IS route control and optimization - IS-IS level-1 and level-2 routing - IS-IS basic concepts and network structure |
| Topic 2: OSPF Routing Protocol | 22% | - OSPF area types and LSA types - OSPF basic principles and characteristics - OSPF special configurations and troubleshooting - OSPF neighbor and adjacency establishment - OSPF route summarization and filtering |
| Topic 3: IP Multicast | 10% | - PIM-DM and PIM-SM mechanisms - Multicast principles and addresses - IGMP protocol and operations |
| Topic 4: Routing Control | 13% | - Routing policy and filter policy - IP prefix list and access control list - Route redistribution between protocols |
| Topic 5: Switching Technologies | 15% | - Eth-Trunk technology and configuration - RSTP and MSTP protocols - Advanced switch features and security |
| Topic 6: BGP Routing Protocol | 22% | - BGP confederation and route reflector - BGP route policy and filtering - BGP basic principles and session establishment - BGP path attributes and route selection rules |
Huawei HCIP-Routing&Switching-IERS(Huawei Certified ICT Professional-Implementing Enterprise Routing and Switching Network) Sample Questions:
Which of the following BGP attributes are unique to Huawei?
- A. AS-PATH
- B. prefVal
- C. Origin
- D. MED
Correct Answer: B 🗳️
Which of the following description about configuration commands for issuing default routes for each protocol is wrong?
- A. In the OSPF protocol, the default-route-advertise command is used to advertise the default route to the common OSPF area.
- B. In the BGP protocol, the default-route imported command is used to enable the import of default routes into the BGP routing table.
- C. In a static route, the ip route-static default-preference command is used to generate a default route on the current router.
- D. In the RIP protocol, the default-route originate command is used to generate a default route or send the default route in the routing table to the neighbor.
Correct Answer: C 🗳️
Which of the following descriptions of the OSPF message is correct? (Multiple choice)
- A. The Full status indicates that the LSDBs of the two routers have been synchronized.
- B. Negotiate the master-slave relationship in the ExStart state. After confirming the master-slave relationship, the master router sends DD packets, and the slave router cannot actively send DD packets, which can only respond to DD packets sent by the master router.
- C. In the Loading state, the routers send DD packets containing the summary of the link state information to describe the contents of the local LSDB.
- D. The DD packet sent in the ExStart state contains the link state description.
Correct Answer: A,B 🗳️
The description of LACP protocol, which is correct? (Multiple choices)
- A. Interact with the peer through the Link Aggregation Control Protocol Data Unit (LACPDU).
- B. The device at both ends determines the active end based on the system LACP priority and system ID.
- C. Based on the IEEE802.3au standard.
- D. The device at both ends determines the active interface based on the passive interface LACP priority and interface ID.
Correct Answer: A,B 🗳️
About the description of well-known attributes in BGP, which is correct? (Multiple Choice)
- A. The well-known attributes are divided into two types: recognized mandatory and optional transition.
- B. Well-known attributes are identifiled by all BGP routers and must exist in the Update message.
- C. Well-known attributes are identifiled by all BGP routers, but it does not need to exist in the Update message.
- D. BGP must recognize all well-known attributes.
Correct Answer: B,C,D 🗳️
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