[单选] 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?（）

If authentication is enabled，which statement is true？（） client reports will display authenticated usernames。 client reports will display both the username and IP address of the clients。 client reports are not affected by authentication。 client reports will display the IP address of the authentication server。 从《（）》的内容和情调上，我们都可以肯定，它的意境是从南唐诗人李璟的“青鸟不传云外信，丁香空结雨中愁”的词句演化而来的。 区域亚文化理论 Which three pieces of information are available from the Cisco CRS 4.0 Control Center?（） System Parameters Configuration  。 Cisco Unified CallManager Cluster Status  。 Date, Time, and Reason of Last Failure  。 Cisco CRS License Information  。 Cisco CRS Datastore Replication Status  。 Cisco CRS Component Activation&e。 医疗体操 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?（）