单项选择题
What is the default value of the SPT threshold in Cisco routers？（）
A. 0 B. 1 C. 2 D. 4 E. 16 F. infinity
多项选择题 Refer to the exhibit. Which two statements are correct regarding the creation of a multicas tdistribution tree？ （）
单项选择题 TowhichofthesedoesIPmulticastsendpackets？（）
单项选择题 Whichoftheseportsdoessyslogusetosendmessagestoasyslogserver？（）
