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问题 #1
What network problems can’t QoS solve?
A. Business single width
B. Delay jitter in transmission
C. Packet loss rate
D. Transmission resourcescorrect
问题 #2
Network elements A, B, and C are OSN 3500s that form a chain network. The two AIC stations are connected to routers. The IPR router is connected to the OptiX SDH equipment through the STM-1 POS port. The PAS port also uses 1 and C2 bytes as payload transfer bytes (for carrying services). VC4 services are created from network element A to network element C, and VC4 is passed through network element B. In this case, is there any alarm reported inside the SDH network?
A. No alarmcorrect
B. There is a C2 mismatch alarm
C. There is a J1 mismatch alarm
D. There is a C2 not installed alarm
问题 #3
If the LED on the SCC board of OSN 8800 T32 shows a value of 11, which of the following subrack ID information does it represent?
A. Secondary subrack
B. No. 1 slave rack
C. No. 11 slave rackcorrect
D. No. 17 slave rack
问题 #4
In the Linux system, configure an IP address 129.9.1.100 for the network card Eth0, and use which of the following command?
A. ifconfig eth0 129.9.1.100correct
B. ipconfig 129.9.1.100
C. ipconfig eth0 129.9.1.100
D. ifconfig 129.9.1.100
问题 #5
When LOATOA/THA/TOMTOG and other single board services are activated, the client-side interface of this end reports a SYNC alarm. What is the reason?
A. The client-side interface on this end receives light abnormally, and the client-side interface on the other end receives light abnormally
B. The client-side interface on this end receives light normally, but the client-side interface on the other end receives light abnormally
C. The port receives light normally, and the client-side port receives light normally
D. The client-side interface on this end receives light abnormally, while the client-side interface on the other end receives light normallycorrect
问题 #6
The single-fiber bidirectional optical interface of the PTN equipment distinguishes upstream and downstream business flows based on time slots.
问题 #7
It is known that the GE optical interface technical indicators of a certain PTN equipment are as follows: average transmit optical power (dBm): -5~0, receive sensitivity (dBm): -23, minimum overload point (dBm): -3, minimum extinction ratio (dB): 9. For this optical interface, which of the following optical powers (dBm) is the most suitable received optical power?
A. -3
B. -15correct
C. -5
D. 0
问题 #8
The IP address you use is 165.247.52.119, the subnet mask is 255.255.240.0, which subnet is your host on?
A. 165.247.52.0
B. 165.247.32.0
C. 165.247.56.0
D. 165.247.48.0correct
问题 #9
Which of the following are not precautions for the preliminary test?
A. Before the test, check whether the required test lines are complete, the type of connector and the applicability of the instrument, and whether the connection is good.
B. Prepare cotton swabs and alcohol, and pay attention to the cleanliness of the connectors at all times during the optical interface characteristic test to ensure the accuracy of the test data.
C. Be careful not to look directly at the optical sending interface during the test, so as not to damage the eyes.
D. During the 24-hour bit error test, it should be ensured that the entire test process is free from external interference (including human factors and power conditions, etc.). If there is an exception, the exact time of the exception should be recorded or re-tested. The test time does not need to exceed 24 hours.correct
问题 #10
In what order do the downstream signals flow through the functional blocks of the SL16 circuit board?
A. SPI, RSE, MST, MSP, MSA, HPTcorrect
B. HPT, MSA, MST, RST, SPI
C. SPL, MST, RST, MSP, MSA, HPT
D. HPI, MSP, MSA, MST, RST, SPI
问题 #11
Which of the following are commonly used test instruments for WDM system include? (Multiple choice)
A. Optical power metercorrect
B. Optical Spectrum Analyzercorrect
C. Optical Time Domain Reflectometercorrect
D. Data Service Testercorrect
E. 2M BER tester
F. Multimetercorrect
问题 #12
During the downgrading process of the smart service, the intermediate node is reset, and the downstream node will have?
A. Signaling residuecorrect
B. Slot Reservation Residual
C. Slot inconsistency remains
问题 #13
What are the main modules of Huawei RTN 900 series equipment? (multiple choice)
A. GPS
B. IF cable
C. Antenna
D. ODU
E. IDU
问题 #14
Back-to-back OTM sites, three new relay wavelengths are added. The schematic diagram is as follows. Which of the following statements is wrong?
A. No impact on OTM site up and down services
B. The input optical power of the optical amplifier board does not need to be adjusted
C. No further adjustment is required for the VOA on the relay wavelengthcorrect
D. The VOA of the upper wave does not need to be adjusted
问题 #15
The IP address you use is 165.247.52.119, and the subnet mask is 255.255.240.0. Which subnet is your host on?
A. 165.247.52.0
B. 165.247.32.0
C. 165.247.56.0
D. 165.247.48.0correct
问题 #16
Using the integral method to measure the OSNR value of a 100G signal, the integrated value of the signal power + noise power in the channel interval read from the OSA is 9.68uW, the integrated value of the noise power in the channel interval is 29.58nW, and the signal center frequency is 0.1nm. The integrated power within is 7.395nW, then the OSNR value is?
A. 10log [(9.68-0.02958)/0.007395]correct
B. 10log [(9.68+0.02958)/0.007395]
C. 10log [(9.68-0.007395)/0.02958]
D. 10log [(9.68+0.007395)/0.02958]
问题 #17
A certain network has 2,250 equivalent network elements of SDH series, 1,000 equivalent network elements of WDM series, and 1,000 equivalent network elements of router series. The customer purchased value-added functions such as SDH end-to-end, WDM end-to-end, and Corba northbound. Regarding this network management deployment plan, which of the following is wrong?
A. Since there are SDH, OTN and router series network elements, it is necessary to install the SDH network element manager, OTN network element manager and router network element manager subsystems
B. The maximum management capacity of the SDH network element manager subsystem is 2500 equivalent network elements, so one SDH network element manager instance needs to be deployed; the maximum management capacity of the router network element manager subsystem is 5000 equivalent network elements, Therefore, a router NE manager instance needs to be deployedcorrect
C. Due to the purchase of SDH end-to-end and WDM end-to-end value-added features, it is necessary to install SDH network management subsystem and OTN network management subsystem; due to the purchase of Corba northbound interface, it is necessary to install Corba northbound subsystem
D. If the OTN series network elements are OSN 6800+OSN 8800T32 (without ASON, the ratio of the two numbers is 1:1), among which OSN 6800 is used as the master subrack, and OSN 8800 is used as the slave subrack. And each master subrack carries only one slave subrack. The actual number of OSN 8800 physical network elements is 125
问题 #18
Regarding the differences between Linux and Solaris operating systems, which of the following statements is wrong?
A. All disks need to be recognized by the operating system, but Solaris needs to be set in the sd.conf file, while Linux does not need
B. Solaris itself only supports UFS hard disk file system; in Linux, there are many disk file systems to choose from, the default is ext3
C. In Solaris, hot-plug devices are managed through cfgadm-. In Linux, when a device is connected, the system automatically recognizes and configures the hot-plug device.
D. Linux comes with the fssnap command for creating and managing file system snapshots. Solaris does not have such a file system snapshot toolcorrect
问题 #19
Which of the following statements is wrong about the test items of IEEE 1588V2 time protection function?
A. The active and standby states of the clock board and cross-connect board on the OptiX OSN 8800 are related to each other. When performing a switchover test, it is recommended to only switch the cross-connect board or the clock board.
B. The active and standby states of the clock board and cross-connect board on the OptiX OSN 6800 are related to each other. When performing a switchover test, it is recommended to only switch the cross-connect board or the clock board.correct
C. Test the long-term stability of the time performance in PTP synchronization mode. The output time performance should be within ±1us.
D. For the long-term jitter test of the physical layer synchronization mode, a time analyzer with a GPS receiver is used to observe at the node for more than 8 hours. The test output time performance should be within ±1us.
问题 #20
If the instrument transmits data at a frame rate of X and receives data at a frame rate of Y, then packet loss rate = (XY)/X*100%, usually packet loss rate + throughput = 1
问题 #21
Four network elements A, B, C, and D form a two-fiber bidirectional multiplex section shared protection ring, and there are a large number of PDH services between A and B. One day, the optical fiber between A and B is interrupted. In order to eliminate the R-LOS alarm on the network management system, an engineer performs a self-loop on the optical ports at both ends of the interrupted optical fiber. After 10 minutes by default, what will happen?
A. The service between A and B is interrupted, and the switching alarm disappears.
B. The services of A and B are not affected, and the switching alarm does not disappearcorrect
C. The service between A and B is interrupted, and the switching alarm does not disappear
D. The business between A and B is not affected, and the switching alarm disappears
问题 #22
Which of the following is an error in the system OSNR commissioning?
A. Adjust the single wave group first, and then adjust the main line optical powercorrect
B. One of the principles for adjusting the OSNR flatness of the MPIR point system: After the system power is determined, the OSNR flatness of the MPI-R point is tested by a spectrometer. If the OSNR flatness does not meet the standard (OSNR flatness index s21B), it needs to be adjusted.
C. The combiner is an M40V board. "Look at the receiving end and adjust the transmitting end". While ensuring that the optical power flatness meets the index requirements, the optical power flatness can be sacrificed to ensure the flatness of OSNR (or BER).
D. APE automatically adjusts the optical power of each channel to ensure the flat optical power at the receiving end, thereby ensuring the flatness of OSNR
问题 #23
While expanding the existing network wave distribution system, which of the following performances do not need to be evaluated?
A. PMD parameters of the linkcorrect
B. Optical power of OTU/OA
C. BER of OTU before error correction at the receiving end
D. Optical power flatness at the receiving end (with MCA)
问题 #24
During the network acceptance test, it was found that OSN 3500 could work normally when connected to an external clock source, and entered the hold state when disconnected from the external clock source. However, the hold state could not last for 24 hours. Which of the following are the possible reasons?
A. The time of accessing the external high-precision clock source is too shortcorrect
B. The clock SSM function is not enabled
C. Clock level setting error 70200
D. The clock crystal oscillator fails and the board needs to be replaced
问题 #25
Which of the following statements about the reporting of OTUk_BDI alarm is wrong?
A. Only the WDM side port will report OTUk_BDIcorrect
B. The downstream station's corresponding OTU board receives OTUk_AIS
C. The downstream station's corresponding OTU board receives OTUk_TIM
D. The downstream station’s corresponding OTU board receives OTUk_SSF
问题 #26
The following is the network parameter planning of an engineer’s network management server, among which planning is correct? (Multiple choice)
A. Network management server host name: Server123-correct
B. Stand-alone system (Windows) IP address planning: IP address: 129.9.1.1/255.255.255.0; gateway: 123.9.1.254correct
C. A network server with 2000 equivalent network elements, the planned bandwidth value for managing network elements is 3.02Mbit/scorrect
D. For a network with 2,000 equivalent network elements, a collection period of 15 minutes, and 7 days of performance data retention, the planned performance database size is 80GBcorrect
问题 #27
After replacing the single master control, the new master control software is inconsistent with the previous faulty master control software. Which alarm may be triggered by the network element damage?
A. SWD_PKGVER_MM
B. SWDL_INPROCESS
C. SWDL_CHGMNG_NOMATCHcorrect
D. SWDL_PKG_NOBDSOFT
问题 #28
ODUk_PM_AIS alarm is one of the conditions for ODUK_SNCP switching
问题 #29
When planning a 1+1 HSB, corresponding planning principles should be followed. Which of the following are not planning principles for HSB?
A. If the protection type is recovery, it is recommended to set the waiting recovery time to 5 to 12 minutes. The recommended setting is the default value of 10 minutes.
B. It is recommended to enable reverse switching to prevent invalid RDI switching at the transmitting end due to signal fading.correct
C. It is recommended to set "Alarm reporting mode" to "Protection group reporting only"
D. Although 1+1 HSB has no restrictions on the slots of the IF boards, it is still recommended that the master and backup IF boards be installed in the dual slots.
问题 #30
The maximum dispersion tolerance of an OTU board is 800ps/nm. On a G.652 fiber, the dispersion-limited distance can be roughly considered to be?
A. 40KMcorrect
B. 60KM
C. 80KM
D. 10KM
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