Pass the actual test with the help of H31-421-ENU study guide
Last Updated: Jul 22, 2026
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| Section | Objectives |
|---|---|
| Topic 1: LTE System Architecture | - E-UTRAN and EPC Architecture - LTE Network Elements and Interfaces |
| Topic 2: LTE Security and QoS | - QoS Mechanisms in LTE - Authentication and Encryption |
| Topic 3: LTE Advanced Features | - VoLTE and IMS Introduction - Carrier Aggregation |
| Topic 4: LTE Air Interface Principles | - OFDM and SC-FDMA Principles - Physical Layer Structure |
| Topic 5: LTE Protocol Stack | - RRC, PDCP, RLC, MAC Functions - Control and User Plane Architecture |
| Topic 6: Mobility Management | - Idle and Connected Mode Mobility - Handover Procedures |
| Topic 7: Network Planning and Optimization | - Radio Network Planning Basics - Performance Optimization Techniques |
1. In summary collection table, which the following parameters need to negotiate with MME/SGW side?
A) "Port" in the "MME info"
B) "TIME ID" in the "MME Info"
C) "CIkSource Type" in the "System Clock"
D) "First Service IP" in the "S-GW Info"
2. The LBBP board cannot be installed on the new BBU3910. Only UBBPs can be installed.
A) True
B) False
3. Which of the following is a functional X2AP agreement?
A) Paging
B) eNodeB configuration updates
C) E-RAB management
D) Load Management
E) Mobility Management
4. Which of the following PRACH preamble formats can only be used for TDD random access?
A) Format 1
B) Format 3
C) Format 2
D) Format 4
5. PS domain evolution to the EPC, control surface with the user plane separation for MME and SGW is in 3 GPP which version?
A) R8
B) R7
C) R6
D) R5
Solutions:
| Question # 1 Answer: A,D | Question # 2 Answer: B | Question # 3 Answer: A,B,D,E | Question # 4 Answer: D | Question # 5 Answer: A |
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