[Jan 12, 2022] Reliable H31-311-ENU Exam Tips Test Pdf Exam Material
New 2022 H31-311-ENU Test Tutorial (Updated 190 Questions)
NEW QUESTION 13
The EPL service exclusively uses bandwidth on the line, which is highly secure. It is applicable to the private line application of VIP customers.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 14
Both PDH and SDH have globally unified standards.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 15
The difference between a dispersion compensation fiber and a common fiber is that the dispersion compensation fiber has a negative dispersion coefficient at ().
- A. 800 nm
- B. 1310 nm
- C. 1650 nm
- D. 1550 nm
Answer: D
NEW QUESTION 16
In an OSN 550, the CXL slot houses a functional board that integrates the system control and communication (SCC) unit, cross-connect unit, and clock unit. The functional board is available in multiple types depending on the functions and access capabilities provided by the OSN 550.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 17
Which of the following is the functional unit that provides high-speed signal interfaces and processes corresponding signals?
- A. Cross-connect unit
- B. Auxiliary unit
- C. Tributary unit
- D. Line unit
Answer: D
NEW QUESTION 18
The pointer is used for alignment and indicates the start position of VC-n in the corresponding AU or TU frame. In this way, the receive end can correctly remove the corresponding VC from the STM-N, and then split the VC and C encapsulation to separate low-rate signals, such as PDH. That is, low-rate tributary signals can be directly dropped from the STM-N signal.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 19
Which of the following statements about the EFS4 board are correct? (Multiple Choice)
- A. This board must be used together with a processing board.
- B. This board has four FE ports.
- C. This board supports Layer-2 switching.
- D. The board interface an LC interface.
Answer: B,C
NEW QUESTION 20
In the case of SNCP, a line board selectively receives services. Therefore, the SNCP can protect the services on the line.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 21
Which of the following are optical-layer trails? (Multiple Choice)
- A. OTS
- B. OSC
- C. OCh
- D. OMS
Answer: A,B,C,D
NEW QUESTION 22
Optical supervisory channels are intended for the supervisory of WDM optical transmission systems. In UU-T recommendations, 1510 nm wavelengths at a ( ) rate are preferentially used.
- A. 2 Mbit/s
- B. 192 kbit/s
- C. 64 kbit/s
- D. 576 kbit/s
Answer: A
NEW QUESTION 23
The fiber core refractive index n1 must be Q the cladding layer refractive index n2, which is a necessary condition for transmitting optical signals in optical fibers.
- A. equal to
- B. higher than
- C. lower than
Answer: B
NEW QUESTION 24
The PRBS can be used to test whether an SDH service is normal and whether the protection switching function is normal.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 25
For 100G (112 Gbit/s) signals, the actual data baud rate is only 28G baud.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 26
Which of the following are the device-level protection schemes of SDH products? (Multiple Choice)
- A. Power supply protection
- B. TPS protection
- C. Cross-connect and timing board protection
- D. System control board protection
Answer: A,B,C,D
NEW QUESTION 27
Which of the following are the components of a WDM system multiplexing N wavelengths? (Multiple Choice)
- A. Wavelength division multiplexing unit
- B. Supervisory unit
- C. Optical amplifier unit
- D. Optical transponder unit
Answer: A,B,C,D
NEW QUESTION 28
An optical amplifier unit compensates for line loss and extends transmission distance. Connecting multiple optical amplifier units in cascading mode can infinitely extend transmission distance of a system.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 29
The K1 and K2 bytes can transmit APS switching signaling, and can also indicate that the multiplex section signal fails.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION 30
When synchronization is performed on the U2000, the NE data that is the same as that on the U2000 is not uploaded to the U2000, and the data that exists on the U2000 but not on the NE is deleted.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 31
If the overhead bytes pass through the backplane bus between two slots, the two slots are called paired slots. Paired slots implement automatic transparent transmission of overhead bytes, such as (), (), and ( ). This improves MSP switching performance and protects DCC communication with other NEs even if the SCC board on the local NE is offline. (Multiple Choice)
- A. E1 byte
- B. K byte
- C. D byte
- D. B1 byte
Answer: A,B,C
NEW QUESTION 32
Which of the following can be configured as the monitoring time of NE performance events?
- A. Later than the current time
- B. Same as the current time of the NE
- C. Earlier than the current time
- D. Any time
Answer: A
NEW QUESTION 33
In ITU-T G.692 recommendations, the allowed channel frequency is based on the reference frequency ( ) and the channel spacing can be 100 GHz, 50 GHz, or 25 GHz.
- A. 196.1 THz
- B. 194.1 THz
- C. 193.1 THz
- D. 192.1 THz
Answer: C
NEW QUESTION 34
Which of the following factors determines that the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent After signals are transmitted for a certain distance in a WDM system, the optical signal-to-noise ratio (OSNR) at the receive end decreases to a certain extent.
Which of the following is the main cause?
- A. EDFAs are used.
- B. New types of optical fibers are not used.
- C. Fiber attenuation is excessively high.
- D. Multiplexers and demultiplexers are used.
Answer: A
NEW QUESTION 35
Which of the following statements about the 1+1 protection of cross-connect boards are correct? (Multiple Choice)
- A. Two cross-connect boards have the same configuartion. Service boards will selectively receive services from one of them based on the quality of services and status of cross-connect boards.
- B. After service cross-connections are completed, the active and standby cross-connect boards send the data of the active cross-connect board to the sink service board.
- C. The buses of the two cross-connect modules work independently and do not interfere with each other.
- D. The source service board sends services to the active and standby cross-connect boards.
- E. The sink service board can receive only the data from the active cross-connect board.
- F. The dual-bus system structure indicates that the service board performs dual feeding of data to the cross-connect side and selective receiving of the data on the cross-connect side.
Answer: A,C,D,F
NEW QUESTION 36
......
H31-311-ENU Cert Guide PDF 100% Cover Real Exam Questions: https://www.vce4dumps.com/H31-311-ENU-valid-torrent.html