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NEW QUESTION 45
Which of the following description of the DM12 board are correct? (Multiple choice)
- A. Electrical signal input and output interfaces for DDN, Unframed E1 and sub-rate services
- B. One DX1 board can be used with two DM12
- C. Accessing G.703 64 kbit/s co-directional service signals through the DB44 interface on the DM12 board
- D. Access the NX6bit/s and sub-rate service signals through the DB28 connector on the DM12 board.
Answer: B,C,D
NEW QUESTION 46
The shortcomings of traditional OTDR meters in measuring optical fibers are: (Multiple choice)
- A. Business will be interrupted during measurement
- B. Cannot be used for routine maintenance testing
- C. Manual interpretation is required, which requires high operator requirements
- D. Need inbound measurement
Answer: A,B,C,D
NEW QUESTION 47
The following description of the ASDN software structure, the correct ones are: (Multiple Choice)
- A. The transmission plane refers to the traditional transmission network.
- B. Intelligent software main application management plane
- C. Intelligent optical network consists of three planes
- D. The management plane mainly refers to upper management such as network management.
Answer: A,C,D
NEW QUESTION 48
OLA sites can also use ESC.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 49
ODUk SNCP protection cannot be automatically switched. The possible reasons are: (Multiple Choice)
- A. Electrical cross configuration error
- B. SNCP type setting error
- C. Waiting for the recovery time to be set too long
- D. Set the lock or forced switch command
Answer: A,B,C,D
NEW QUESTION 50
The NG WDM two-dimensional ROADM site can use the WSMD9 single board, and its signal flow is an optical signal that is connected to the main optical channel from the "IN" optical port. The RDU (ROADM Demix Unit) optical module broadcasts 9 identical optical signals, which are output from the "DM1~DM8" and "ECPO" optical ports respectively. One of the signals is localized by the splitter board, and the other eight signals are dispatched to the other eight directions. Each wave of the main optical channel is connected from the "EXPI" optical port. The multiplexed or single-wave optical signal that needs to be inserted locally is input through the "AM1"~"AM8" optical port.
- A. TRUE
- B. FALSE
Answer: A
NEW QUESTION 51
Which of the following statements about MPLS is wrong?
- A. MPLS has two planes: control plane and forwarding plane. The control plane is connection-oriented, the forwarding plane is connectionless.
- B. In the packet transport field, the MPLS technology is mainly used to construct tunnels to carry various types of services (for example, TDM, ATM, and Ethernet) transmitted by PWE3 to implement end-to-end transmission of services on packet networks.
- C. MPLS is not a service or application. It is a standard routing and switching platform that supports various upper-layer protocols and services.
- D. MPLS packet forwarding is based on labels.
Answer: A
NEW QUESTION 52
Which of the following description of the Optix OSN 9800 sub-rack is correct? (Multiple choice)
- A. The service board can be inserted into the IU18 slot only when the OSN 9800 P18 is used as the slave sub-rack.
- B. In the OSN 980 0U32 sub-rack, IU70 is the primary CTU and IU78 is the standby CTU.
- C. The OSN 9800 U16 sub-rack has a total of 16 service slots. These slots have the same capacity and support up to 400 bit/s ODUk crossover in a single slot.
- D. When the OSN 9800 Universal Platform Sub-rack is used as a slave sub-rack, the main control board must be placed.
Answer: A,C
NEW QUESTION 53
The following protection methods belonging to NG WDM optical layer protection are: (Multiple Choice)
- A. 1+1 protection inside the board
- B. Customer side 1+1 protection
- C. ODUk SNCP protection
- D. Optical line protection
Answer: B,D
NEW QUESTION 54
If no bit error test is performed on a optical channel for 10 minutes, the local end uses the SDH analyzer to connect to the client-side port on the OTU board, the client-side port on the opposite OTU board need to be self-looped by a fiber. In the case of self-loop, a fixed attenuator must be added.
- A. True
- B. False
Answer: A
NEW QUESTION 55
Which of the following is approximately equal to 100mw?
- A. 15dBm
- B. 10dBm
- C. 13dBm
- D. 20dBm
Answer: D
NEW QUESTION 56
As with the STP device, the NG WDM device can practice the network element configuration on the network through pre-configured method.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 57
For the whole network error test in the commissioning test, which of the following statement is correct? (Multiple choice)
- A. When the single channel error test is performed, the remote end needs to perform hardware loopback on the tributary board client side.
- B. The number of OTU boards or tributary boards connected in series for the whole channel error test is recommended to be no more than 13
- C. To ensure the smooth passage of all channel services across the entire network, a 10-minute error prediction is required for each single channel.
- D. The duration of the full channel error test is 20 hours. If the error occurs within 20 hours, it needs to be retested for 20 hours after troubleshooting.
Answer: A,C
NEW QUESTION 58
When the working channel of the optical line protection fails, it cannot be automatically switched to the protection channel. What are the possible reasons? (Multiple choice)
- A. Artificially issued a lock command
- B. The protection channel is faulty
- C. Protection group parameter configuration is error
- D. Waiting for the recovery time to be set too long
Answer: A,B,C,D
NEW QUESTION 59
The protocols used in ASON are RSVP-TE, CSPF-TE, and LMP.
- A. True
- B. False
Answer: A
NEW QUESTION 60
In a typical chained NG WDM network (such as A -> B -> C, A, B, and C are three sites), it is found that the official telephone number between the stations is not available during the commissioning. What are the possible reasons? (Multiple choice)
- A. C station receiving direction OA board damage
- B. B station SC2 board is damaged
- C. In the SC2 board configuration of station B, the configuration is incorrectly changed to "the official does not pass the optical port."
Answer: B,C
NEW QUESTION 61
Which of the following statements about the line fiber quality monitoring performance parameters is wrong?
- A. Measurement is performed multiple times within the detection time. The average value is obtained based on the measurement results to improve the measurement precision. The actual duration from the time when a detection event starts to the time when the detection results are returned will be longer than the Detection time.
- B. The pulse width of emitted optical pulses varies according to monitoring modes, and affects the detection distance and measurement precision. A greater pulse width provides a larger dynamic range, longer detection distance and better measurement precision.
- C. The total fiber loss will affect the detection distance and the dynamic range is fixed for the same detection mode. Therefore, a larger total fiber loss indicates a smaller detection distance.
- D. When the pulse width increases, the light emitting time increases and consequently a larger energy is obtained. This means that a larger dynamic range can be acquired but also larger dead zones will result.
Answer: C
NEW QUESTION 62
The following description of 1+1 and 1:1 optical line protection, the fault is (). (Multiple Choice)
- A. 1+1 optical line protection and 1:1 optical line protection use the same protection board
- B. According to different placement of OLP boards in the network, 1+1 optical line protection can be divided into 1+1 OMS path protection and 1+1 OTS path protection.
- C. The main difference between 1:1 optical line protection and 1+1 optical line protection is whether the APS protocol is required.
- D. 1:1 optical line protection switching mode can only be double-ended switching
Answer: A,C
NEW QUESTION 63
What are the ways that NG WDM devices create fibers? (Multiple Choice)
- A. Form method
- B. Search method
- C. Synchronization method
- D. Graphic method
Answer: A,B,D
NEW QUESTION 64
If the tunnel APS is configured for the tunnel to which the PW belongs, the PW cannot be configured with the PW APS.
- A. TRUE
- B. FALSE
Answer: B
NEW QUESTION 65
Before querying the error and optical power on the network management, you need to perform the () operation. Otherwise, you cannot query the corresponding teaching data.
- A. Configuration data
- B. Synchronizing network metadata
- C. Create a logical fiber
- D. Turn on NE performance monitoring time.
Answer: D
NEW QUESTION 66
Which of the following methods does the networking and application of NG WDM include? (Multiple choice)
- A. Chain type
- B. Ring
- C. Mesh
- D. Point to point
Answer: A,B,C
NEW QUESTION 67
MPLS APS is a network protection mechanism. It implements service switching by using the MPLS OAM detection function.
- A. True
- B. False
Answer: A
NEW QUESTION 68
Which of the following signals can be used as input or output signals of an external clock interface?
- A. 2.048 Mbit/s
- B. 34 Mbit/s
- C. 155 Mbit/s
- D. 2.048 MHz
Answer: C
NEW QUESTION 69
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