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The refractive index n1 of the fiber core must be the Q of the cladding refractive Mo n2, which is a necessary condition for transmitting the optical signal in the optical fiber.
Which of the following bytes in the regenerator part overhead are associated with R-OOF and R-LOF? (Multiple Choices)
After the U2000 sends configuration data to the network element, if the SCC single board authentication fails, the network element enters the installation state.
The Raman amplifer uses which of the following effects?
For osn3500, which of the following boards provides centralized backup capability for the +3.3V power supply of each board in the sub-shelf?
Which of the following can be configured as the monitoring time for network element performance events?
The last 256 columns in the OTN frame structure are the FEC regions for forward False correction.
Which of the following is the VLAN classification method? (Multiple choice).
U2000 can flexibly interconnect with different third-party network administrators through the Northbound Interface (NBI) and provide physical inventory and alarm information for the upper-layer network management.
Which of the following is not the advantage of WDM?
Which of the following statements about signal label byte C2 are incorrect?
The optical amplifier unit compensates for line losses and extends the transmission distance. Connecting multiple optical amplifier units in cascaded mode allows for extended transmission distances without following the system.
Only one TCM can be used at one site
Which of the following statements about overhead bytes is incorrect?
The rate of SF64 and SL64 boards is STM54. Therefore, the two plates can be interconnected.
Which of the following alerts does not trigger an AU-AIS alert?
Which of the following is affected by changing the element ID of OSN3500 on NMS?
On the NMS system, the network element performance monitoring time is set to () minutes and () hours.
The following is the frame structure of the STM-16?
Which of the following statements about basic LCAS functionality are correct? (Multiple choice).
Which of the following statements regarding the protection of the cross-connecting plate 1+1 is correct? (Multiple choice).
Which of the following local maintenance endpoints can be used to manage MSTP devices?
If you group SNCP services with the same source, sink, or route, you can increase the SNCP switching speed
When there is a Critical False In Seconds (SES) in the PM portion of the ODUk layer, which of the following alarms is reported by NMS?
In a 2.5GMSP ring consisting of four MSTP sites, which of the following statements about alarm reports is correct when a protection switchover occurs?
When the bridge uses ivl learning mode, an entry in the MAC address table is created based on the source MAC address and source port of the teach frame. This entry applies to all VLANs
Optical monitoring channel is used for monitoring of WDM optical transmission systems. In the UU-T recommendation, it is preferable to use a 1510 nm wavelength of the a ") rate.
Optical module parameter "L-64.2" in "2" indicates which of the following working windows?
Which of the following is the functional unit that provides a high-speed signal interface and processes the corresponding signal?
Optical module parameter "L-64.2" in the "2" indicates which of the following working windows?
Array waveguide grating (AWG) multiplexer/multiplexer has the following advantages: short wavelength spacing, large number of channels and flat passband. Suitable for DWDM systems in ultra-high speed, large tubes.
Which of the following is not a nonlinear effect?
In the frame structure of the SDH signal, there are large overhead bytes for operation, management, and maintenance (OAM). Overhead bytes account for all bits () of the entire frame and greatly enhance the monitoring capabilities of the network.
Which of the following are the components of the WDM system summer with N glass lengths? (Multiple choice).
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?
What of the following operations may interrupt the network element service? (Multiple choice).
QinQ technology can be used when multiple users need to share the same VCTRUNK and use the same VLAN ID.
The difference between dispersion compensation fibers and ordinary optical fibers is that the dispersion compensation fibers have a negative dispersion coefficient at ().
Which of the following communication protocols are used for DCN management of Huawei devices? (Multiple choice).
During service configuration, there are two time slot modes. Huawei uses interleaved time slot mode by default.
Configuring the EPLAN service as a ring is not recommended. If the EPLAN service is configured as a ring network, the STP protocol must be enabled on the network to prevent broadcast storms.
Which of the following is the functional unit that provides serial data for the interface and system associated with the orderwire phone?
Which of the following statements about the U2000 license is incorrect?
In the Windows operating system, the log files of the U2000 program are stored in the () directory of the U2000 installation disk.
When the SNCP ring consisting of four Optis OSN 2500 devices has a rate of 25 Gbt/s, the network's service answer stars can carry up to ()2Mt/s Signal.
MSP is a network-level protection scheme. MSF does not directly protect services, and MSP switching and recovery are not affected even if there is no service on the MSP ring.
The AAC address consists of 46 bits and is globally unique
Which of the following - is the meaning of the eighth-digit MAC address with 1?
Which overhead below 112 is not ODUk overhead?
According to ITU-T's recommendations, the requirement that the MSP switching time should be within 50ms is conditional. For example, the number of net elements on the entire ring network is less than 16.
Coherent receiver technology uses a local oscillator laser with the same frequency as the received signal to perform coherent processing and recover () information from the received signal. (Multi-quality selection.)
The OTN signal has a fixed pad period, the same frame period as the SDH signal.
In the SDH optical synchronous transmission system, which of the following bytes is used to transmit the quality and weight and usage information of the clock source?
For OSN3500, there is a slot mapping relationship between the processing board and the interface pre-processor. The processing board in slot 1 maps to the interface board in slots 19-20.
In the OSN550, the CXL slot contains a function board that integrates a system control and communication (SCC) unit, a cross-connecting unit, and a clock unit Depending on the functionality and access features provided by the OSN550, there are several types of dashboards
K1 and K2 bytes can send APS switching signaling or indicate that the multiplexed segment signal is invalid.
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?
By default, B2-EXC alerts are reported when the number of B2 bit Falses exceeds the () threshold.
When using a script to back up and restore network configuration data for the U2000, you can change the directory where the export file is saved.
Which of the following statements about the OTM-n .m and OTMnr .m for OTN are incorrect?