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The dispersion of a non-zero dispersion shifted fiber is 6 ps/nm*km at 1550 nm and 10 ps/nm*km at 1610 nm. What is the minimum dispersion compensation required if an L-Band DWDM signal travels through 200 km of fiber and has a dispersion tolerance of 1800 ps/nm?（）
- A、none
- B、-600 ps/nm
- C、-200 ps/nm
- D、+200 ps/nm
- E、+600 ps/nm
参考答案
更多 “The dispersion of a non-zero dispersion shifted fiber is 6 ps/nm*km at 1550 nm and 10 ps/nm*km at 1610 nm. What is the minimum dispersion compensation required if an L-Band DWDM signal travels through 200 km of fiber and has a dispersion tolerance of 1800 ps/nm?（）A、noneB、-600 ps/nmC、-200 ps/nmD、+200 ps/nmE、+600 ps/nm” 相关考题
考题
There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A‘s DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80.Which statement is true?（）A. Router A remains the DIS and generates a new pseudonode LSP for that LANB. Router A remains the DIS and NO new pseudonode LSP is generated for that LANC. Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router AD. Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A
考题
How often are IS－IS Hello packets transmitted?()
A. 3 seconds for DIS; 9 seconds for non-DISB. 9 seconds for DIS; 3 seconds for non-DISC. 10 seconds for DIS; 3 seconds for non-DISD. 10 seconds for all routers
考题
If the dispersion of a given fiber is 17ps／nm*km at 1550 nm and zero at 1310 nm, then what is the accumulated dispersion of an ITU wavelength after it travels 200 km?()
A.0 ps/nmB.340 ps/nmC.200 ps/nmD.3400 ps/nmE.More information is needed.
考题
Why are the 1300 nm and 1550 nm regions of the fiber spectrum primarily used for optical communications?()
A. They are both regions of lowest loss.B. They are both regions of low reflections.C. They are both regions of low index of refraction.D. They are both regions of low chromatic dispersion.E. They are both regions of low Polarization Mode Dispersion (PMD).
考题
Which three technologies are used to reduce chromatic dispersion accumulation in fiber－optic transmission systems? ()(Choose three.)
A. PIN photodiodesB. zero-chirped lasersC. Erbium-doped fiber amplifiersD. dispersion compensating fiberE. dispersion compensating Bragg grating
考题
以下关于DIS选举规则描述正确的是（）。A、DIS的选择需要手动设置B、DIS由整个广播网络上优先级最高的IS担当C、优先级相同时由IP地址最大的担当D、当一个DIS不能工作时，备份DIS会接替它进行工作
考题
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems？（）A、 PIN photodiodesB、 zero-chirped lasersC、 Erbium-doped fiber amplifiersD、 dispersion compensating fiberE、 dispersion compensating Bragg grating
考题
If the dispersion of a given fiber is 17ps/nm*km at 1550 nm and zero at 1310 nm， then what is the accumulated dispersion of an ITU wavelength after it travels 200 km？ （）A、 0 ps/nmB、 340 ps/nmC、 200 ps/nmD、 3400 ps/nmE、 More information is needed.
考题
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems? （）(Choose three.)A、PIN photodiodesB、zero-chirped lasersC、Erbium-doped fiber amplifiersD、dispersion compensating fiberE、dispersion compensating Bragg grating
考题
DCM表示是什么器件？（）A、色散位移光纤。（Dispersion-shifted fiber）B、非色散位移光纤。（Non-dispersion-shifted fiber）C、色散补偿模块。（Dispersion compensation module）D、偏振模色散。（Polarization mode dispersion）
考题
下列哪条命令是属于查看单AP下的连接用户数假设AP-name为H3C？（）A、dis wlan ap name H3CB、dis wlan ap name H3C verboseC、dis wlan client ap H3CD、dis wlan server-template
考题
A 2.5 Gb/s (OC-48 or STM-16) optical signal with a dispersion tolerance of 1200 ps/nm goes through fiber with 18ps/nm*km of dispersion. How many 15216-DCU-350 equivalents are needed for enough compensation after traveling 100 km?（）A、noneB、oneC、twoD、threeE、four
考题
How often are IS-IS Hello packets transmitted?（）A、3 seconds for DIS; 9 seconds for non-DISB、9 seconds for DIS; 3 seconds for non-DISC、10 seconds for DIS; 3 seconds for non-DISD、10 seconds for all routers
考题
Which two initialization parameters would you set to enable Automatic Shared Memory Management？（）A、 set SHARED_POOL_SIZE to zeroB、 set STATISTICS_LEVEL to BASICC、 set SGA_TARGET to a non-zero valueD、 set DB_CACHE_SIZE to a non-zero valueE、 set STATISTICS_LEVEL to TYPICAL or ALL
考题
单选题How often are IS-IS Hello packets transmitted?（）A
3 seconds for DIS; 9 seconds for non-DISB
9 seconds for DIS; 3 seconds for non-DISC
10 seconds for DIS; 3 seconds for non-DISD
10 seconds for all routers
考题
单选题The dispersion of a non-zero dispersion shifted fiber is 6 ps/nm*km at 1550 nm and 10 ps/nm*km at 1610 nm. What is the minimum dispersion compensation required if an L-Band DWDM signal travels through 200 km of fiber and has a dispersion tolerance of 1800 ps/nm？（）A
noneB
-600 ps/nmC
-200 ps/nmD
+200 ps/nmE
+600 ps/nm
考题
单选题If the dispersion of a given fiber is 17ps/nm*km at 1550 nm and zero at 1310 nm， then what is the accumulated dispersion of an ITU wavelength after it travels 200 km？ （）A
0 ps/nmB
340 ps/nmC
200 ps/nmD
3400 ps/nmE
More information is needed.
考题
单选题正对门机站立，门机上的四个继电器从左到右依次为（）A
JIS、OC、DIS、7KSRB
OC、JIS、DIS、7KSRC
7KSR、DIS、JIS、OCD
D、DIS、JIS、O7KSR
考题
单选题There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A's DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80. Which statement is true?（）A
Router A remains the DIS and generates a new pseudonode LSP for that LANB
Router A remains the DIS and NO new pseudonode LSP is generated for that LANC
Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router AD
Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A
考题
多选题Which two initialization parameters would you set to enable Automatic Shared Memory Management？（）Aset SHARED_POOL_SIZE to zeroBset STATISTICS_LEVEL to BASICCset SGA_TARGET to a non-zero valueDset DB_CACHE_SIZE to a non-zero valueEset STATISTICS_LEVEL to TYPICAL or ALL
考题
多选题Which two statements regarding the IS-IS DIS election process are true？ （）AA priority of 0 will prevent a router from becoming a DIS.BIf the DIS becomes unavailable the backup DIS is promoted to DIS.CAdding a router with a higher priority than the current DIS will result in the new router becoming DIS.DSeparate L1 and L2 election processes are held on a brodcast network.EL1 routers on a broadcast network only establish adjacencies with the DIS.FIf there is a tie based on priority，the router whose attached interface has the lowest MAC address becomes the DIS.
考题
单选题Which of the following components is part of the ink dispersion system？（）A
Print HeadsB
Cleaning headsC
Pickup RollerD
Charge Assembly
考题
单选题The dispersion of a non-zero dispersion shifted fiber is 6 ps/nm*km at 1550 nm and 10 ps/nm*km at 1610 nm. What is the minimum dispersion compensation required if an L-Band DWDM signal travels through 200 km of fiber and has a dispersion tolerance of 1800 ps/nm?（）A
noneB
-600 ps/nmC
-200 ps/nmD
+200 ps/nmE
+600 ps/nm
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