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السؤال #1
Which of the following options can improve the service experience of multicast users when switching channels (shorter switching time)?
A. When adding a multicast program, disable the prejoin function
B. Enable the quick leave function when adding a multicast user
C. When adding a multicast user, enable the preview functioncorrect
D. Use a group address with a small value
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اجابة صحيحة: C
السؤال #2
The "BTS measurement report preprocessing" switch is turned on. When it is set to "Yes", it reduces the Abis interface signaling and BSC load, which can improve response time and network performance.
A. Truecorrect
B. False
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اجابة صحيحة: A
السؤال #3
(Single) A total of 100 multicast users on OLT are watching 20 multicast programs, assuming that each multicast program occupies 2M bandwidth, then how much multicast traffic is currently on the OLT upstream port
A. A200M
B. B100M
C. C40M
D. D50M
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اجابة صحيحة: C
السؤال #4
In GPON Networking, which of the following does not belong to MDU series products?
A. MA5616
B. MA5612
C. MA5620G
D. MA5680Tcorrect
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اجابة صحيحة: D
السؤال #5
(Multi-select) Network Management U2000 adds line templates to realize the mapping of user traffic flows to GEM PORTS, including mapping modes(Radio)
A. MAC
B. PORT
C. vlan
D. 802
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اجابة صحيحة: BCD
السؤال #6
The user's home is set to ONT dial-up, but the PC can't access the Internet. Log in to the ONT web interface and find that the ONT has obtained the address. The PC can also obtain the private network address 192.168.100.2. What are the possible reason? (Multiple Choice)
A. WAN and LAN are not bound
B. ONT NAT is not turned on
C. The LAN port is not set in Layer 3 mode
D. VLAN without set WAN ports
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اجابة صحيحة: AB
السؤال #7
Is the following description correct? When configuring multicast services, the VLAN carrying the multicast service must be the same as the unicast VLAN ID.
A. True
B. Falsecorrect
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اجابة صحيحة: B
السؤال #8
In esight's OnT zero configuration deployment, do not provision OLT when incrementally configuring OLT.
A. True
B. False
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اجابة صحيحة: A
السؤال #9
(single) Is the following description correct? Under IGMP snooping, two users on the OLT broadcast the same program, and the OLT sends two join messages to the multicast router.
A. True
B. False
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اجابة صحيحة: A
السؤال #10
When watching an IPTV program, there is a blurring phenomenon, what are the possible reasons? (Multiple choice)
A. Some key frames are lost during line transmission;
B. Speed limit on the device
C. Some key frames are lost during program compression;
D. The receiving and emitting power of the equipment is at a critical value
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اجابة صحيحة: ABC
السؤال #11
(Single choice) When planning qos, it is necessary to plan reasonably according to the business, and adopt the () scheduling mode for high-priority businesses.
A. WHY
B. RR
C. DRR
D. WRR
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اجابة صحيحة: A
السؤال #12
According to the IEEE 802.1Q standard, where is the VLAN identification field in the Ethernet frame?
A. Before the source MAC address and destination MAC address
B. Between the source MAC address and destination MAC address
C. After the source MAC address and destination MAC addresscorrect
D. Not fixed
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اجابة صحيحة: C
السؤال #13
What is the uplink wavelength of 10G EPONE?
A. 1577nm
B. 1270m (symmetrical)correct
C. 1310m (asymmetrical)
D. 1490nm
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اجابة صحيحة: B
السؤال #14
(Radio) 10G GPON system downlink wavelength is
A. 1310nm
B. 1577nm
C. 1270mm
D. 1490nm
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اجابة صحيحة: B
السؤال #15
Compared with GPON, XGS-PON can cover more users and provide higher bandwidth rate on the premise of the same ODN network architecture.
A. TRUEcorrect
B. FALSE
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اجابة صحيحة: A
السؤال #16
A power access service deploys GPON Type C dual-homing protection, and the state of the protection group and the uplink Ethernet port is determined on the OLT. When the state of the Ethernet port associated with the protection group on the OLT changes to down, which of the following descriptions is incorrect?
A. The state of the work port on the ONU side changes to standby
B. OLT communicates with ONU uplink status change
C. After switching, the service on the ONU is sent to the OLT through the protect port, that is, the service message is transmitted on the protect port
D. ONU detects link failure and triggers protection switchingcorrect
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اجابة صحيحة: D
السؤال #17
Which of the following descriptions about the characteristics of large concentration and small concentration is wrong?
A. Large concentrated light splitting, FAT is set in the information distribution area in the corridor, and FAT can choose direct fusion or patch module (recommended patch module)
B. Small concentrated light splitting, the light splitter is centrally set in the large-capacity FAT or small FDT in the information distribution area, and the number is allocated according to the number of users
C. Set using first-order spectroscopy
D. Large-scale optical splitting, the optical splitters are centrally set on the large-capacity ODF/FDT in the information convergence area, and the number of optical splitters is configured according to the number of userscorrect
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اجابة صحيحة: D
السؤال #18
(single) Is the following description correct? The minimum activation rate (Minimum transmission rate) in the ADSL/ADSL2+ parameter indicates the minimum activation rate that must be reached in this direction after the line is activated. If the setting is too large, the modem may not be activated normally.
A. True
B. False
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اجابة صحيحة: A
السؤال #19
GPON only supports downlink AES-128 encryption, XG-PON supports bidirectional AES-128 encryption
A. TRUEcorrect
B. FALSE
عرض الإجابة
اجابة صحيحة: A
السؤال #20
The setting of T3168 must take into account the influence of the wireless environment, that is, BLER. Generally, the larger the BLER, the larger the value of T3168.
A. Truecorrect
B. False
عرض الإجابة
اجابة صحيحة: A
السؤال #21
What will happen when a user who is talking enters another LAC area from one LAC area?
A. Update the location first and then switch
B. Switch first, update the location after the call endscorrect
C. Simultaneous handover and location update
D. None of the above is true
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اجابة صحيحة: B
السؤال #22
Which of the following is the formula for calculating EIRP?
A. BTS max
B. BTS max
C. BTS max
D. None of the above is true
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اجابة صحيحة: A
السؤال #23
In the Type C protection mode, which switching type is not supported?
A. Forced switching
B. Semi-automatic switching
C. Manual switchingcorrect
D. Automatic switching
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اجابة صحيحة: C
السؤال #24
The class D multicast address range is from 224.0.0.0 to 238.255.255.255.
A. True
B. Falsecorrect
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اجابة صحيحة: B
السؤال #25
The double-rate three-color marking (TrTCM) algorithm can guarantee the basic bandwidth (CIR) of users, and allow users to obtain additional bandwidth services (PIR) when the network is idle, improving the utilization of network resources.
A. TRUEcorrect
B. FALSE
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اجابة صحيحة: A
السؤال #26
The traditional fusion splicing scheme of POL ODN has centralized light splitting, heavy fiber baking workload and low construction efficiency.
A. TRUEcorrect
B. FALSE
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اجابة صحيحة: A
السؤال #27
For the PITP P mode, the VBAS request message is encapsulated in a PADS message and sent to the OLT.
A. TRUE
B. FALSEcorrect
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اجابة صحيحة: B
السؤال #28
The MA5600T/MA5680T provides various networking protection functions. Which of the following protection features is usually used for uplink protection? (Multiple Choice)
A. Smart Link and Monitor Link Features
B. GPON Type C protection
C. Ethernet link aggregation
D. GPON Type B protection
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اجابة صحيحة: AC
السؤال #29
Which of the following messages does not carry the Time Advance field?
A. Handover Command
B. Assignment Commandcorrect
C. Establish Indication
D. Physical Information
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اجابة صحيحة: B
السؤال #30
Use OTDR to locate the position of abnormal attenuation in the optical path. After the OTDR is connected to the detected line, which of the following parameters can be set? (Multiple choices)
A. Setting the measurement rangecorrect
B. Set the wavelengthcorrect
C. Setup modecorrect
D. Set pulse widthcorrect
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اجابة صحيحة: ABCD

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