السؤال #1

The working mode of a port determines the flow control mode of the port. When the working mode is 100 Mbit/s full duplex, which of the following flow control modes can be used?

A. Auto-negotiation flow control mode

B. Non-auto-negotiation flow control modecorrect

C. Both of the above

D. None of the above

عرض الإجابة

اجابة صحيحة: B

السؤال #2

In Ethernet, the frame length has a lower limit, which is mainly due to which of the following considerations?

A. Carrier Sense

B. Multi-point access

C. Conflict detectioncorrect

D. Improve network bandwidth utilization

عرض الإجابة

اجابة صحيحة: C

السؤال #3

The SDH network is composed of multiple network nodes (network elements) connected to each other through optical fibers; network topology generally refers to the shape of the network, that is, the geometric arrangement of network nodes and transmission lines, which reflects the logical connection of the network.

A. True

B. Falsecorrect

عرض الإجابة

اجابة صحيحة: B

السؤال #4

Which of the following statements about the optical-layer interfaces OTM-n.m and OTM-nr.m of OTN is incorrect?

A. n indicates the number of wavelengths carried by the maximum capacity,

B. m indicates the rate

C. r indicates OTM without the OSC function

D. OTM-nr

عرض الإجابة

اجابة صحيحة: B

السؤال #5

Which of the following boards supports the QinQ function?

A. EFT8

B. EGT2

C. EMS4correct

D. EMR2

عرض الإجابة

اجابة صحيحة: C

السؤال #6

The Ethernet board has an external port (Port) and an internal port (VCTRUNK). The external port can set the Tag attribute, but the internal port cannot set the Tag attribute.

A. True

B. Falsecorrect

عرض الإجابة

اجابة صحيحة: B

السؤال #7

OChr means using electrical monitoring technology

A. Truecorrect

B. False

عرض الإجابة

اجابة صحيحة: A

السؤال #8

Which of the following is the maximum number of OSN 3500 subracks that can be installed in a 2.2 m cabinet?

A. 1

B. 3

C. 2

D. 4

عرض الإجابة

اجابة صحيحة: C

السؤال #9

When the bridge uses IVL learning mode, an entry in the MAC address table is created based on the original MAC address and original port of the data frame. This entry applies to all VLANs

A. True

B. Falsecorrect

عرض الإجابة

اجابة صحيحة: B

السؤال #10

The STAT indicator of the SDH board flashes red, lights up for 100ms, and turns off for 100ms. Which of the following means the state of the metric?

A. AHardware mismatch

B. BHardware failure

C. CNormal operation

D. DThere is no power input

عرض الإجابة

اجابة صحيحة: A

السؤال #11

Which of the following are VLAN classification methods? (Multiple Choice)

A. By protocol

B. By subnet

C. By port

D. By MAC address

عرض الإجابة

اجابة صحيحة: ABCD

السؤال #12

FAS is the frame alignment overhead with a length of 6 bytes. The 1st to 3rd bytes are 3 OA1 bytes, each OA1 is always "1111 0110"; the 1st to 6th bytes are 3 OA2 bytes, each OA2 is always "0010 1000". OA1 and OA2 are the frame alignment bytes of this frame signal, which are equivalent to A1 A2 in the SDH frame structure.

A. Truecorrect

B. False

عرض الإجابة

اجابة صحيحة: A

السؤال #13

OSN 3500 branch line business has strong up and down capabilities, with 16 branch line outlet slots, 504 2M, 32 E4, 117 E3/DS3, 132 STM-1e up and down subracks, providing STM-1/4/ 16/64 group rate.

A. Truecorrect

B. False

عرض الإجابة

اجابة صحيحة: A

السؤال #14

If SNCP services with the same source, sink or route are grouped, the SNCP switching speed can be improved.

A. Truecorrect

B. False

عرض الإجابة

اجابة صحيحة: A

السؤال #15

Which of the following descriptions about multiplexing is correct? During byte interleaving multiplexing, the information payload and pointer bytes of each frame are interleaved and multiplexed according to the original values, and the segment overhead is also multiplexed accordingly.

A. STM-4 has 4 times the overhead of STM-1

B. The overhead in STM4 is newly integrated into only one set of overheadcorrect

C. The overhead number in STM-4 is the same as that in STM-1

D. Random generation of overhead in STM-4

عرض الإجابة

اجابة صحيحة: B

السؤال #16

R-LOS, R-LOF, AU-AIS, TU-AIS alarms are all generated and reported on the circuit board.

A. True

B. Falsecorrect

عرض الإجابة

اجابة صحيحة: B

السؤال #17

For an OSN 3500, which of the following boards provides the centralized backup function for the +3.3 V power supply of each board in the subrack?

A. AUX

B. COA

C. SCC

D. PIU

عرض الإجابة

اجابة صحيحة: A

السؤال #18

QinQ technology can be interpreted as 802.1Q in 802.1Q, in other words, a layer of 802.1Q label is added on top of the 802.1Q label , the outer layer is C-VLAN and the inner layer is S-VLAN , two bytes more than a normal 802.1Q frame .

A. True

B. Falsecorrect

عرض الإجابة

اجابة صحيحة: B

السؤال #19

Compared with a dense wavelength division multiplexing (DWDM) system, a coarse wavelength division multiplexing (CWDM) system provides a certain number of wavelengths and a transmission distance within ( ) km, which greatly reduces system cost and has strong flexibility.

A. 50

B. 100correct

C. 200

D. 20

عرض الإجابة

اجابة صحيحة: B

السؤال #20

Which of the following is not included in the basic architecture of MPLS L2VPN?

A. ACcorrect

B. VC

C. Tunnel

D. S-VLANcorrect

عرض الإجابة

اجابة صحيحة: AD

السؤال #21

Which of the following statements is wrong?

A. In the MPLS VPNE connection model, the network consists of the operator's backbone network and the user's various sites

B. The network construction of MPLS VPN is completed by the service provider

C. The backbone routers within the service provider's backbone network, that is, the routers that are not directly connected to the edge routers, are unaware of the existence of the VPN and are only responsible for data transmission within the backbone network

D. All VPN construction, connection and management are performed on backbone routers

عرض الإجابة

اجابة صحيحة: D

السؤال #22

The SDH frame structure is a rectangular block frame based on which of the following options?

A. Bytescorrect

B. Bit

C. Block D frame

عرض الإجابة

اجابة صحيحة: A

السؤال #23

The half-duplex mode must have a collision detection and avoidance mechanism to avoid the situation where multiple devices seize the line at the same time. This mechanism is the so-called CSMA/CD, and the Chinese name is carrier sense multiple access/collision detection .

A. Truecorrect

B. False

عرض الإجابة

اجابة صحيحة: A

السؤال #24

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

A. AUnidirectional path protection ring

B. BSNCP ring

C. CBidirectional MSP ring

D. DAll of the above

عرض الإجابة

اجابة صحيحة: C

السؤال #25

How many 2M business work boards does OSN 7500 support at most? Which of the following is correct?

A. 1

B. 2

C. 3

D. 4correct

عرض الإجابة

اجابة صحيحة: D

السؤال #26

If a network port that supports auto-negotiation is connected to a network port that does not support auto-negotiation, half-duplex to full-duplex may occur.

A. Truecorrect

B. False

عرض الإجابة

اجابة صحيحة: A

السؤال #27

Which of the following statements is incorrect.

A. In the connection model of MPLS VPN, the network is composed of the backbone network of the operator and each site of the user

B. The network construction of MPLS VPN is completed by the service provider

C. For the backbone routers inside the backbone network of the service provider, that is, the routers that are not directly connected to the edge routers, they do not know the existence of the VPN, and are only responsible for data transmission within the backbone network

D. All VPN construction, connection and management work is carried out on the backbone router

عرض الإجابة

اجابة صحيحة: AD

السؤال #28

Which of the following are the electrical-layer overheads of OTN? (Multiple Choice)

A. OPUkcorrect

B. ODUkcorrect

C. OCh

D. OTUkcorrect

عرض الإجابة

اجابة صحيحة: ABD

السؤال #29

Which of the following descriptions are correct? (Multiple choice)

A. The difference between a 1+1 linear multiplex section and a 1:1 linear multiplex section is whether APS is required

B. The 1:1 linear multiplex section can be equipped with additional services, and its switching mode is only double-ended recovery switching

C. Whether it is a two-fiber bidirectional MSP ring protection ring or a four-fiber bidirectional MSP ring, there are requirements for the nodes in the ring

D. The APS protocol of the four-fiber bidirectional multiplex section protection ring is carried by the protection optical fiber

E. The protection mode of SNCP protection is " double transmission, selective reception", which is especially suitable for decentralized services

عرض الإجابة

اجابة صحيحة: ABCD

السؤال #30

The physical layer of LAN is often used for the interconnection of routers and switches. Although it is called a local area network, if a 10GBase-LR or -ER optical module is used, the transmission distance can reach 80 kilometers.

A. Truecorrect

B. False

عرض الإجابة

اجابة صحيحة: A

لا تريد أن تفوت شيئا؟

اجتياز اختبار الممارسة Cisco وPMP وCISA وCISM وAWS بنسبة 100% للبيع!
احصل الان

عرض الإجابات بعد التقديم

لا تريد أن تفوت شيئا؟

اجتياز اختبار الممارسة Cisco وPMP وCISA وCISM وAWS بنسبة 100% للبيع! احصل الان

عرض الإجابات بعد التقديم

اجتياز اختبار الممارسة Cisco وPMP وCISA وCISM وAWS بنسبة 100% للبيع!
احصل الان