HCIA-Transmission V2.5 Questions and Answers
After a user adjusts service bandwidth, the NCE Controller delivers the new bandwidth to devices and adjusts the CIR and PIR of the service PW. During the adjustment, services are not interrupted.
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.
In MSP networking, when the optical fiber is connected between sites, the east light plate of the site is connected to the west light plate of the downstream site, and these stations are connected in turn to form a ring. In this case, the direction from the toko plate of the site to the wine light plate of the downstream station is the direction of the main ring, and the direction of forming the ring is the direction of service.
Which of the following bytes can be used for ordenwire calls between two REG devices?
Which of the following bytes in the regenerator part overhead are associated with R-OOF and R-LOF? (Multiple Choices)
The rate of STM-1 is ()bit/s.
SDH is a complete standard digital signal hierarchy that provides____, multiplexing, and cross-connection. (Enter only lowercase letters.)
The Raman amplifer uses which of the following effects?
Which of the following alerts does not trigger an AU-AIS alert?
Which of the following is not a non-linear effect?
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.
There are 48 bits in MAC address. The first ( ) bits make up a unique identifier for the vendor and the last ( ) bits are allocated by the vendor
Which of the following statements about the clock source are incorrect?
In WDM systems, it is ideal to use a dielectric thin problem filter (TFF) when using less than () wavelengths.
RSOH, MSOH, HPOH and LPOH implement the monitoring function in descending order of the monitoring fan country.
Measure the False correction capability of fec with encoded gain. Which of the following statements about the coding gain is incorrect?
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.
When performing fiber cut-off test on an ordinary MSP ring, which of the following alarms will be reported? (Multiple choice).
Manual configuration will clear the data on the NE side
The scope of management of OMSn is the path from the input optical port on the multiplexer unit of the sending site to the output optical port on the multiplexer unit of the receiving site, called the optical multiplexing segment (OMS) path.
Which of the following is not an EVPLAN feature?
What of the following operations may interrupt the network element service? (Multiple choice).
The SP3D board supports 63 E1 services
Which factors determine the optical signal-to-noise ratio (OSNR) of the receiving end to a certain extent After the signal transmission in the WOM system is transmitted over a certain distance, the "oSNR" of the receiving end of the optical signal-to-noise ratio is reduced to a certain extent. Which of the following is the main cause?
Which of the following is photolayer tracking? (Multiple Choices)
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 statements about the MST functional module is correct? (Multiple choice).
Which of the following clock operating modes supports the ITU-T G.781 standard? (Multiple choice).
In the case of SNCP, the board selectively receives the service. Therefore, SNCP can protect services on the line.
When a bit False is detected in B2 bytes, which of the following alarms is reported by the peer?
Which of the following are device-level protection schemes for SDH products? (Multiple choice).
Are the following statements regarding the definition of SDH correct?
When the sender detects that the b6-b8 of the K2 byte is 110, it means that the sender has reported an alarm ().
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?
Which of the following is not a nonlinear effect?
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.
The dual fiber ring topology consisting of three network elements is arranged in counterclockwise order as the service between A, B and C A and C occupies the first VC-48 on the short path VC-12 time slots, B and C of the same service also occupy the 48th of the first VC-4 on the short path VC-12 time slots
In the system control unit, which of the following databases does not lose data after a power failure? (Multiple choice).
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?
Which of the following is the default WTR time for MSP switching?
Which of the following statements regarding multiplexing partial remote False indication (MS-REI) is correct?
(1) B2 bytes indicate the transmission channel.
(2) The M1 byte represents the transmission channel
(3) THE MS-REl is sent from the receiver to the source.
(4) MS-REI is transmitted from the source to the receiver.
(5) Indicates the number of bit Falses detected by the receiver after receiving the MS signal.
The frame structure of ODU4 is four times that of ODU1
Forced switching, fiber switching, manual switching and motion switching are decreased in order of priority.
Which of the following modulation technologies has the best performance in terms of wavelength stability?
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
Which of the following statements about OTN advantages is false?
Which overhead below 112 is not ODUk overhead?
Which of the following statements about the U2000 license is incorrect?
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
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.
The working and protection ports of a linear MSP group must be on the same board.
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?
For (on-premises) HA solutions where active and standby servers are deployed in the same location, which of the following platforms can be deployed? (Multiple choice).
Hitless protection switching (HPS) provides the dual fed and selective receiving function for fiber differential protection services and aligns the end-to-end latencies of the working and protection paths, improving service reliability.
Which of the following sites support service adding/dropping?
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.
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.
PDM uses a polarization beam splitter to divide the laser into two vertical directions: x and y.
The TNG1N401 board supports hybrid transmission of multiple ODUk granularities.
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.
When you configure services on a per-NE basis, which of the following protection scenarios does not require subnet configuration before subsequent protection operations?
Bait-doped fiber amplifiers (EDFAs) are a key component of the new generation of optical communication systems. Which of the following is the feature of EDFA? Multiple Choice) □
In the OTN standard system, which of the following protocols defines optical transport network interfaces?
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.
For MSPs, you need to set the MSP protocol ID for each NE. To ensure that each ID is unique, it is recommended to set the MSP protocol ID to the value that is compatible with the network element ID.
Which of the following are prerequisites for self-healing networks?
Which of the following different types of ESC are divided according to the principles of implementation? (Multiple choice)
NE A and NE B are adjacent NE
If B3 and low-order Falses occur in the A->B direction, and B1, B2, B3, and low-order Falses occur in the B->A direction, it is caused by Which of the following performance events does NEA report? (Multiple choice).
The standard Ethernet frame length should not be less than 64 bytes Which of the following factors contribute to this limitation? (Multiple choice).
When an OTU board works with an OLP board, the optical power difference cannot be used as a trigger condition for intra-board 1+1 protection switching.
Automatic Laser Shutdown (ALS): When no optical signal is received, the ALS function automatically turns off the corresponding optical module. This feature protects field maintenance personnel.
Both PDH and SDH have globally harmonized standards.
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
