单选

●Communic

ation protocols are&n
bsp;(66)
connection-oriente
d or connectionless， (67) whether the sender of a message needs to contact and maintain a dialog with the recipient or (68) send a message without any prior connect and with the hope that the recipient receives everyth
B．neither
C．either
D．all (67) A．fulled
B．flooded
C．depending on
D．defined by (68) A．immediately
B．simply
C．accordingly
D．properly (69) A．in order
B．in array
C．in series
D．in queueing (70) A．make known
B．disclose
C．reveal
D．discover

试题出自试卷《2011年网络管理员考试考前密卷（九）-上午试题》

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