A PAUSE frames use reserved multicast addresses and are not forwarded by bridges or switches. In this way, the PAUSE frame does not generate any additional information.

RSOH, MSOH, HPOH and LPOH implement the monitoring function in descending order of the monitoring fan country.

When the J1 byte does not match, an alarm () is reported and the service may be interrupted.

Which of the following is the steps to multiplex a low-speed service into a high-speed SDH service? (Multiple choice).

Which of the following layers define the protocols that control the network layer? The protocol for this layer applies to logical links, i.e. end-to-end connectivity between two devices.

LCK insertion takes precedence over AIS insertion. That is, if the user configures LCK insertion and the conditions for automatic AS insertion are met, the LCK is inserted.

Which of the following device domains can be managed by U2000? (Multiple choice).

Which of the following types of optical fibers has the zero-dispersion feature at 1310 nm?

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.

Which of the following statements about the MD02 board is incorrect?

STM-64 has an () AU pointer.

By default, B2-EXC alerts are reported when the number of B2 bit Falses exceeds the () threshold.

Single-fiber bidirectional WDM systems use only one optical fiber to transmit optical signals in both directions at the same time. Light signals in both directions should be arranged at different wavelengths.

What are the basic features of the U2000? Multiple Choices

The difference between dispersion compensation fibers and ordinary optical fibers is that the dispersion compensation fibers have a negative dispersion coefficient at ().

In the Windows operating system, the log files of the U2000 program are stored in the () directory of the U2000 installation disk.

The OTN signal has a fixed pad period, the same frame period as the SDH signal.

EPL services use bandwidth exclusively on the line, which is very safe. Dedicated line applications for VIP customers

The following is the frame structure of the STM-16?

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.

Self-healing refers to the capability of a network to automatically recover its services within a short period from a fault without any manual intervention. Users are unaware of the network fault. A network with this self-healing capability is a self-healing network.

Optical module parameter "L-64.2" in the "2" indicates which of the following working windows?

Linear MSP (LMSP) has two modes: 1+1 and 1:1. Additional services can only be configured for the protection channel in 1:1 mode of the LMSP.

Which of the following clock operating modes supports the ITU-T G.781 standard? (Multiple choice).

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?

Which of the following light sources has the best dispersion tolerance and stability?

The number of ODU2e signals multiplexed into the ODU3 signal is the same as the number of ODU2 signals multiplexed into the ODU3 signal.

When performing fiber cut-off test on an ordinary MSP ring, which of the following alarms will be reported? (Multiple choice).

The rate of STM-0 is 51.84 Mbtt/s.

Which of the following service types are supported by MS-OTN devices?

If the overhead bytes pass through two plugged backplane buses, then the two slots are called paired slots that enable automatic transparent transfer of overhead bytes, such as (), () and (). Even if the SCC on the local network element The board is offline, which can also improve msP switching performance and protect DCC communication with other network elements. (Multi-quality selection).

When the number of block errors detected by the B2 byte received at the recerve end is returned to the transmit end through the Ml byte, which of the following alarms or performance events are reported at the transmit end?

When the low-level resources of the device are insufficient, which of the following measures can be taken? (Multiple choice).

The index is used to folio and delineate the starting position of VC-n in the corresponding AU or TU frame so that the receiving end can correctly remove the corresponding VC from the STM-N The VC and C packages are then separated into separate low-rate signals, such as PDH That is; Low-rate branch signals can be discarded directly from the STM-N signal

Two PIU or APIU boards of an OpCXtrans E6616/OptiX OSN 1800V Pro are used to supply power for the system In hot backup mode. When either of the two PIU or APIU boards is faulty, the system can still function properly.

When the fiber between node A and node B is disconnected, the RU on node B detects OTS_LOS alarm and will OTS_BDI The ru of the alert inserted into node A of node A forces reports OTS BDI alarms. The board reports och_SSF alarm on the downstream C node.

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.

The segment overhead of STM-4 is () bytes/frame.

Which of the following can be used as the central wavelength of the pump source in EDFA? (Multiple choice).

Transmitting test frames affects services.

Which of the following statements about ODUk_PM_BDI is correct?

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?

You can view the NE license status and replace the license that is about to expire in a timely manner to prevent the impact of license expiration on services.

When using the LCAS function, which of the following overhead bytes is used to transmit control information? (Multiple Choices)

When the U2000 is synchronized, the same network metadata as the U2000 is not uploaded to the U2000, and the data that exists on the U200 but does not exist on the network element is deleted.

Which of the following technologies is the main difference between an open DWDM system and an integrated DWDM system?

WDM transmits optical signals multiplexed at multiple rates (wavelengths) through a single optical fiber, and the digital signals carried by these optical signals must have the same rate and data format

When setting up LCAS mode, follow these principles:

1. If both ends of the device are Huawei devices, please set it to "Standard Mode".

2. If a Huawei device is interconnected with a third-party device, set the interconnect device to the same mode according to the mode supported by the third-party device.

The TNG1N401 board supports hybrid transmission of multiple ODUk granularities.

Which of the following statements about extending the ECC is incorrect?

Which of the following is the functional unit that provides a high-speed signal interface and processes the corresponding signal?

Which of the following statements about OTN advantages is false?

Which of the following is the VLAN classification method? (Multiple choice).

The last 256 columns in the OTN frame structure are the FEC regions for forward False correction.

If a network port that supports autonegotiation is connected to a network port that does not support autonegotiation, you can interconnect in both half-duplex and full-duplex modes.

When configuring VLAN-based service types, which of the following features must be enabled on the port?

Which of the following logical function modules is used to generate exhaust R-LOS alerts?

Which of the following statements about an Ethernet switch is incorrect?

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.

SDH signals must be scrambled before they can be transmitted over optical fibers. Which of the following bytes is not scrambled? (Multiple choice).

The Raman amplifer uses which of the following effects?

During service configuration, which of the following service levels cannot be selected?

The 1510nm optical monitoring channel can be effectively amplified after passing through EDFA.

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.

The receiver performs a BIP-8 check on unscrambled STM-16 frames. If the BIP8 check result XOR·∶, the value of the B1 byte contained in the next STM16 ring is 10001100, which indicates STM-16 There is a () bit False block in the axis.

Which of the following are the components of the WDM system summer with N glass lengths? (Multiple choice).

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?

Establish Ethernet leased line service between HI (HQ) and H2 (branch) of enterprise H, and bind 5 in the corresponding VCTRUNK VC-12. When a VC-12 fails, the Ethernet dedicated line between H1 and H2 is interrupted. So, which of the following statements is true?

In WDM systems, it is ideal to use a dielectric thin film filter (TFF) when using less than () wavelengths.

Which of the following is the default WTR time for MSP switching?

Frame-Mapped GFP (GFPF> is a processing mode that targets data encoding blocks such as Fibre Channel and ESCON.

Only one TCM can be used at one site

Which of the following is the configuration mode for the new NE?( Multiple choices).