NO.151 The lower the noise figure of the amplifier, the less noise is introduced by this amplifier.
- A. TRUE
- B. FALSE
NO.152 When the working channel protected by the optical line fails, it cannot be automatically switched to the protection channel. What are the possible reasons? (Multiple Choice)
- A. Protection group parameter configuration error
- B. Artificially issued a lock command
- C. Waiting for the recovery time to be set too long
- D. The protection channel is faulty
NO.153 Which of the following operating modes does the AT8 board support? (Multiple Choice)
- A. Reverse 2E2M
- B. 2E2M
- C. 1E1M
- D. Reverse 1E1M
NO.154 Which of the following description of the AU pointer are correct? (Multiple choice)
- A. The root cause of the AU pointer adjustment is that the clocks between the upstream and downstream stations are not synchronized.
- B. Since the value of the AU-PTR pointer is placed in the last 10 bits of the two bytes H1 and H2, the valid value is 0~1023.
- C. AU-PTR refers to the location of the J0 byte.
- D. If the receiving end detects that the H1H2 byte is all "1", the local end generates an AU-AIS alarm.
NO.155 The following description of the Flexible ROADM, which is wrong?
- A. Improve spectrum utilization and meet flexible scheduling requirements in the future era of over 100 Gbit/= rate.
- B. DFlexible ROADM is compatible with existing networks
- C. WSMD2 board supports F1exible ROADM configuration
- D. Flexible grid technology provides flexible bandwidth settings and flexible bandwidth allocation and scheduling.
NO.156 Which of the following SOM systems is not monitored?
- A. Main light path performance
- B. Type of originating FEC
- C. Light performance flatness
- D. Receive OTU input optical power
NO.157 Which of the following description of the PWE3 technology are correct? (Multiple choice)
- A. The internal data services carried by PWE3 are visible to the core network.
- B. PRE3 technology provides ATM, Ethernet, and TDM services with end-to-end virtual link emulation at the PS network boundary.
- C. PWE3 technology belongs to the second layer VLL solution
- D. For PE3 emulation of Ethernet services, PW control words can be manually configured on the PE.
NO.158 The setting of alarm reversal is based on:
- A. Veneer
- B. Network element
- C. Port
- D. Alarm
NO.159 The main application scenarios for board compatible replacement are (). (Multiple Choice)
- A. Expanding the board
- B. Change the board ID
- C. Change the board IP
- D. Replacement board
NO.160 Which of the following is not a function of RSVP-TE?
- A. LSP path optimization
- B. LSP deletion
- C. LSP rerouting
- D. Establish neighbor relationship
NO.161 After starting the extended SSM protocol, in addition to determining the clock quality level and priority, the clock ID is also determined. After receiving the clock signal with the ID, the network element considers that the source is unavailable if it is judged to be the clock signal sent by the station. In this way, even after passing through multiple sites, the network element can still recognize the clock signal sent by itself, preventing the formation of a timing loop.
- A. TRUE
- B. FALSE
NO.162 For the SSM protocol, which of the following statements are correct? (Multiple choice)
- A. When the SSM protocol is not enabled, the clock network can only be configured as one-way and cannot be looped.
- B. When the extended SSM protocol is started, the clock network can be configured in both directions and can be looped.
- C. When the standard SSM protocol is started, the clock network can be configured in both directions but cannot be looped.
- D. Whether to start the SSM protocol has little effect on the clock network.
NO.163 Which of the following monitoring boards do not support the processing and transparent transmission of 1588V2 signals? (Multiple choice)
- A. ST2
- B. SC2
- C. SC1
- D. AST2
NO.164 During the process of maintaining the OSN device, it is often seen that the fan runs at full speed, and the device reports the TEMP_OVER alarm. What are the common causes and treatment methods?
- A. The dust filter is heavily dusty and affects ventilation. The dust filter needs to be cleaned.
- B. The dust inside the fan is serious, which affects the speed. You need to remove the fan to remove it.
- C. The power module of the board is heavily dusty, affecting heat dissipation, and needs to be removed.
- D. The optical module has an abnormal cooling function and needs to be replaced with a light board.
NO.165 The following description of the Directioned scenario, which is correct? (Multiple choice)
- A. The wavelength carrying the local service can be transmitted to fixed direction.
- B. If the current path needs to be adjusted, you must inbound to adjust the fiber connection of the network.
- C. Directioned scenes are applied to networks that are not ASON.
- D. When the service needs to be adjusted, or the working path is faulty, the optical crossover can be manually configured to implement flexible scheduling of services.