For a DWDM system, the wavelength selection and frequency spacing comply with（），recommendation while that of a CWDM system comply with the requirements of （）。

更多“For a DWDM system, the wavelength selection and frequency spacing comply with（），recommendation while that of a CWDM system comply with the requirements of （）。”相关的问题

第1题

[多选题] Dense Wavelength Division Multiplexing (DWDM) is an important innovation in optical networks.Which two descriptions best define DWDM?（）

A、optical technology for transmitting up to 32 channels over multiple fiber strands B、optical technology for transmitting up to 16 channels over multiple fiber strands C、a WDM system that is compatible with EDFA technology D、a technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .

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第2题

[单选题] DWDM的C波段是（）HZ

A、190.1T～196.1T B、192.1T～196.1T C、193.1T～196.1T D、186.1T～190.1T

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第3题

[单选题] GSM的英文全称是（）

A、Global System for Mobile B、Global Style for Mobile C、Gold System for Mobile D、Global System Mobile

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第4题

[单选题] For lasers with tightly controlled wavelengths, approximately how far apart are the centers of adjacent wavelengths when 100 GHz spacing is used in a DWDM system?（）

A、0.4 nanometers B、0.6 nanometers C、0.8 nanometers D、1.2 nanometers E、1.6 nanometers

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第5题

[单选题] What is the difference between the CUoD and Utility Capacity On Demand?（）

A、Utility allows for activation of resources by the hour. CUoD allows for permanent access to additional resources installed into the system. B、Utility allows for permanent access to additional resources installed into the system. CuOD allows for activation of resources by the hour. C、Utility allows for activation of resources by the minute. CUoD allows for permanent access to additional resources installed into the system. D、Utility allows for a 30 day usage of additional resources installed into the system. CUoD allows for permanent access to additional resources installed into the system.

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第6题

[单选题] A customer wants to consolidate storage from four IBM System p servers and one large IBM System i server. The customer does not have a SAN installed. The customer will require approximately 4 TB for System p and 3 TB for System i. The customer states that performance and isolation of the System i system is most important. Capacity， multi-path access， and replication functions are important for the System p servers. Which solution best satisfies the customer requirements（）

A、IBM System Storage DS8100 with 300 GB drives for the System p， 73 GB/15k drives for System i， and advanced functions for System p capacity B、IBM System Storage DS8300 with LPAR， 73 GB/15k drives for System i， and 300 GB drives and advanced functions for System p capacity C、IBM System Storage DS6800 with direct attach， 73 GB/15k drives for System i performance， and 300 GB drives and advanced functions for System p D、IBM System Storage DS6800 with LPAR， 146 GB/15k drives for System i， 500 GB FATA drives for System p

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第7题

[单选题] （） is used for washing and drinking.

A、The ballast system B、The salt water system C、The bilge system D、The domestic system

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第8题

[单选题] When it is necessary to open a refrigeration system for repairs and the system will be open for more than a few minutes, the open ends of the system should be （）.

A、dehydrated B、purged C、plugged D、evacuated

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第9题

[单选题] If your bridge-to-bridge radiotelephone ceases to operate，you must（）.

A、immediately anchor your vessel and arrange for repairs to the system B、moor your vessel at the nearest dock available and arrange for repairs to the system C、arrange for the repair of the system to be completed within 48 hours D、exercise due diligence to restore the system at the earliest practicable time

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