DumpsActual H31-311_V2.5 Real Exam Question Answers Updated [Oct 15, 2022]
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NEW QUESTION 46
The1310nm and 1550nm transmission windows are low loss windows. In DWDM systems, only the 1560m transfer window is used. Which of the following is the main cause?
- A. The 1550nm wavelength region is suitable for long-distance transmission.
- B. None of the above
- C. The EDFA operating wavelength flatness region is contained in this window.
- D. The nonlinear effect of the B.1550 nm-wavelength region is small.
Answer: C
NEW QUESTION 47
Which of the following are communication quality alerts? (Multiple choice).
- A. There is no login user
- B. Optical port loopback
- C. NE communication in the
- D. Optical signal loss
Answer: C,D
NEW QUESTION 48
Which of the following is affected by changing the element ID of OSN3500 on NMS?
- A. NE time is out of sync.
- B. Restart your device.
- C. Interruption of business.
- D. Network element communication is interrupted.
Answer: D
NEW QUESTION 49
When a bit error is detected in B2 bytes, which of the following alarms is reported by the peer?
- A. RS-BBE。
- B. MS-FEBBE
- C. MS-BBE
- D. MS-AIS
Answer: B
NEW QUESTION 50
NE A and NE B are adjacent NE
If B3 and low-order errors occur in the A->B direction, and B1, B2, B3, and low-order errors occur in the B->A direction, it is caused by Which of the following performance events does NEA report? (Multiple choice).
- A. RSBEE
- B. RSFEBE
- C. HPBBE
- D. HPFEBBE
- E. MSFEBBE
- F. MSBBE
Answer: A,C,D,F
NEW QUESTION 51
EPL services use ports and bandwidth exclusively, and different users may need to share resources. Which of the following methods can be used to isolate user data?
- A. QinQ Technical Wood
- B. MPLS tags
- C. VLAN ID
- D. All of the above
Answer: D
NEW QUESTION 52
The STAT indicator of the SDH board flashes red, lights up for 100ms, and turns off for 100ms. Which of the following means the state of the metric?
- A. Hardware mismatch
- B. There is no power input
- C. Normal operation
- D. Hardware failure
Answer: A
NEW QUESTION 53
Which of the following statements about ODUk_PM_BDI is correct?
- A. ODUk PM part BIP8 bit error threshold crossover
- B. OD0kPM parallel connection indication
- C. ODUk PM signal degradation
- D. O0UkpM follows the defect indication
Answer: D
NEW QUESTION 54
The OTN signal has a fixed pad period, the same frame period as the SDH signal.
- A. True
- B. False
Answer: B
NEW QUESTION 55
Which of the following is the feature of TCM overhead in ODUk signals?
- A. General communications and communication overhead
- B. In-line connection monitoring overhead
- C. Channel oversight fees
- D. Path trace identifier overhead
Answer: B
NEW QUESTION 56
The MAC loopback and PHY loopback are used for fault location. When the MAC loopback is set to in loop, the PHY loopback can be set according to the actual situation.
- A. True
- B. False
Answer: B
NEW QUESTION 57
Which of the following statements about the MST functional module is correct? (Multiple choice).
- A. MST provides an E20 orderwire channel. .
- B. MST returns bit error messages, but does not return a specific number of bit errors
- C. MST is both the source and sink of MS. .
- D. MST implements BIP-8 statistical computation of B2 bytes.
Answer: A,C
NEW QUESTION 58
Which of the following is the steps to multiplex a low-speed service into a high-speed SDH service? (Multiple choice).
- A. Multiplexing
- B. Overhead insertion
- C. Alignment
- D. Mapping
Answer: A,C,D
NEW QUESTION 59
Which of the following is the multiplexing method of SDH?
- A. Asynchronous multiplexing
- B. flexible mapping
- C. Flexible mapping and synchronization multiplexing
- D. flexible mapping and asynchronous multiplexing
Answer: C
NEW QUESTION 60
Which of the following bytes in the regenerator part overhead are associated with R-OOF and R-LOF? (Multiple Choices)
- A. B1.
- B. A2 ()
- C. A1
- D. B2
Answer: B,C
NEW QUESTION 61
SDH signals must be scrambled before they can be transmitted over optical fibers. Which of the following bytes is not scrambled? (Multiple choice).
- A. A2
- B. A1
- C. J1
- D. J0
Answer: A,B,D
NEW QUESTION 62
Measure the error correction capability of fec with encoded gain. Which of the following statements about the coding gain is incorrect?
- A. The coding gain of D.AFEC is greater than the coding gain of FEC.
- B. When ber is constant, the OSNR saved by correcting the encoding is called the encoding gain.
- C. The coding gain of the in-band FEC is greater than the coding gain of the out-of-band FEC
- D. The error correction capability of B.FEC increases with coding gain.
Answer: C
NEW QUESTION 63
Which of the following bytes can be used for wired phones between two REG devices?
- A. E1
- B. E1 and E2
- C. E2
- D. None of the above
Answer: A
NEW QUESTION 64
Which of the following is the basic requirement of the DWDM system in the light source?
- A. The launch function is very high
- B. Use the direct modulation method
- C. output wavelength stabilization
- D. Low dispersion tolerance.
Answer: C
NEW QUESTION 65
Which of the following is the functional unit that provides a high-speed signal interface and processes the corresponding signal?
- A. Line units
- B. Tributary units
- C. Auxiliary units
- D. Cross-connecting unit
Answer: A
NEW QUESTION 66
Which of the following clock operating modes supports the ITU-T G.781 standard? (Multiple choice).
- A. Tracking
- B. Master/Slave
- C. Self-curved running
- D. Hold
Answer: A,C,D
NEW QUESTION 67
The standard Ethernet frame length should not be less than 64 bytes Which of the following factors contribute to this limitation? (Multiple choice).
- A. Minimum transmission distance
- B. How conflict detection works
- C. Maximum transmission distance
- D. MAC address
Answer: B,C
NEW QUESTION 68
Which of the following is photolayer tracking? (Multiple Choices)
- A. OCh
- B. OMS
- C. OTS
- D. osc
Answer: A,B,C,D
NEW QUESTION 69
Which of the following ITLI-T recommendations define the OTN frame structure?
- A. G.709
- B. G.694
- C. G.975
- D. G.652
Answer: A
NEW QUESTION 70
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