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| Section | Objectives |
|---|---|
| Optical Transport Network Fundamentals | - SDH/SONET principles and architecture - OTN technology and frame structure - WDM system fundamentals |
| Transmission Network Technologies | - Optical layer networking and protection mechanisms - DWDM/ROADM technologies |
| Network Planning and Maintenance | - Fault management and performance monitoring - Transmission network design principles |
| IPRAN and Converged Transport | - Synchronization and timing in transport networks - IPRAN architecture and deployment scenarios |
1. The ring network of the OSN6800 equipment group was newly opened, and ODU1-SNCP/N protection was enabled. The engineer reported that a switch occurred one day and has not been restored, but there is no problem with the optical cable. There is an ODU_SNCP_PS alarm on the corresponding ND2 optical port.
Possible reasons are: (multiple choices)
A) "LCK Insert" is set to enable the PM overhead of the related circuit board
B) The related circuit board has a minor alarm ODU1_PM_LCK
C) Related circuit board failure
D) The protection type is configured as SNC/I
2. In NG-SDH equipment, which of the following conditions will not cause TPS switching to occur?
A) 58M crystal oscillator abnormal
B) 3.3V power supply undervoltage
C) Chip abnormality (SD538, SA527, CPLD)
D) Report T_LOSEX on the working branch board
3. After the single main control is replaced with the main control, the new main control is inconsistent with the previous failed main control software, which alarm may be reported by the network element
A) SWDL_INPROCESS
B) SWDL_PKG_NOBDSOFT
C) SWDL_PKGVER_MM
D) SWDL_CHGMNG_NOMATCH
4. Which of the following statements about OTN reuse and overhead is wrong? ()
A) The overhead of the OTN electrical layer unit is the associated overhead, which is transmitted together with the payload
B) Client signals (such as IP/MPLS, Ethernet, SDH signals) are mapped to ODUk as ODU payload plus ODU overhead
C) ODUk combines OTU overhead and FEC overhead and maps to a standardized optical channel transmission unit to form OTUk
D) OTN optical layer overhead is non-path-associated overhead, and an independent optical supervisory channel OSC is responsible for transmission.
5. SPC (Software Permanent Connection). It is the business connection between PC and SC. The user to the network part is directly configured by the network management management plane, and the connection of the network part is initiated by the network management management plane to the ingress network element control plane, which is completed by the ingress network element control plane through signaling
A) TRUE
B) FALSE
Solutions:
| Question # 1 Answer: A,B,C | Question # 2 Answer: D | Question # 3 Answer: D | Question # 4 Answer: B | Question # 5 Answer: A |
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