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NEW QUESTION # 191
Which of the following bridges are used to forward data based on the MAC address and VLAN ID carried in the data?
- A. 802.1a
- B. 802.11ab
- C. 802.1q
- D. 802.1d
Answer: C
NEW QUESTION # 192
On the optical path, the optical power of noise will not decay with increasing distance.
- A. True
- B. False
Answer: A
NEW QUESTION # 193
Which of the following local maintenance endpoints can be used to manage MSTP devices?
- A. All of the above
- B. U2000WebLCT
- C. U200IP LCT
- D. U2000LCT
Answer: D
NEW QUESTION # 194
If you group SNCP services with the same source, sink, or route, you can increase the SNCP switching speed
- A. Error
- B. True
Answer: B
NEW QUESTION # 195
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 # 196
After the U2000 sends configuration data to the network element, if the SCC single board authentication fails, the network element enters the installation state.
- A. Error
- B. True
Answer: B
NEW QUESTION # 197
Both QinQ and MPLS can provide users with L2 VPN services, but QinQ is cheaper and simpler than MPLS.
- A. True
- B. False
Answer: A
NEW QUESTION # 198
MSP is a network-level protection solution. MSP does not directly protect services, and even if there is no service on the MSP ring, MSP switching and recovery will not be affected.
- A. True
- B. False
Answer: A
NEW QUESTION # 199
The difference between dispersion-compensating fiber and ordinary optical fiber is that dispersion- compensating fiber has a negative dispersion coefficient at ().
- A. 1550nm
- B. 1310nm
- C. 800nm
- D. 1650nm
Answer: A
NEW QUESTION # 200
MSTP (Multi-Service Transport Platform) is a multi-service transmission technology based on (), which can simultaneously realize the access, processing and transmission of multiple services such as TDM, ATM, Ethernet, IP, etc.
Answer:
Explanation:
SDH
NEW QUESTION # 201
Which of the following alarms will not trigger an AU-AIS alarm?
- A. AU_LOP
- B. B2_EXC
- C. R_LOS
- D. MS_AIS
Answer: A
NEW QUESTION # 202
Which of the following are types of service boards for MSTP equipment? (Multiple choice)
- A. Interface board
- B. Auxiliary board
- C. Service processing board with interface
- D. Service Processing Board
Answer: A,C,D
NEW QUESTION # 203
What are the main functions of LAG? (Multiple choice)
- A. Detect and report failures at service access points and intermediate transmission networks
- B. Improve link availability
- C. Increase link capacity
Answer: A,C
NEW QUESTION # 204
Which of the following are the basic requirements of DWDM system for light source? (Multiple choice)
- A. Dispersion tolerance is relatively high
- B. Use LED
- C. The output wavelength is relatively stable
- D. Direct modulation should be used
Answer: A,C
NEW QUESTION # 205
MSTP adds () and () interfaces and corresponding signal processing capabilities on top of the original SDH.
Answer:
Explanation:
A. TM|Ethernet
NEW QUESTION # 206
The backplane has two -48V power lines, and each board obtains two 48V power supplies from the backplane. After the power is combined through the diode, the various voltages required by each component are obtained through the DC/DC power module and linear conversion.
- A. True
- B. False
Answer: A
NEW QUESTION # 207
Which of the following options are low-loss areas of single-mode optical fiber? (Multiple choice)
- A. 1550nm
- B. 1400nm
- C. 900nm
- D. 1310nm
Answer: A,D
NEW QUESTION # 208
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