Serialization delay and（）delay are the two components of network delay that are improved by increasing bandwidth. Serialization delay, i.e. the amount of time it takes to put the（）on the wire, and queuing delay (depth of the queue) are improved by increasing the（）from a 128kbps circuit to a T1. However, three other components of delay, routing/switching delay, distance delay, and protocol delay are components that can not be positively affected by an （）in bandwidth. If the circuits are not over-utilized, then increasing the bandwidth to improve the（）of the application will only result in an increased bandwidth with no positive effects on performance.

then increasing the bandwidth to improve the（）of the application will only result in an increased bandwidth with no positive effects on performance.

A．capability

B．cost

C．amount

D．performance

请认真阅读下面这首诗，并回答所列问题。 

春题湖上 

湖上春来似画图，乱峰围绕水平铺。 

松排山面千重翠，月点波心一颗珠。 

碧毯线头抽早稻，青罗裙带展新蒲。 

未能抛得杭州去，一半勾留是此湖。

此诗的作者是谁？是哪个朝代的诗人？