试题与答案

在EPON标准中,关于OLT和ONU定时时,时间戳域的说法,正确的是:()A.时间戳

题型:多项选择题

题目:

在EPON标准中,关于OLT和ONU定时时,时间戳域的说法,正确的是:()

A.时间戳域使用4个字节

B.时间戳域使用2个字节

C.时间戳所标识的是在MAC控制帧上传到MAC层时OLT的计数值

D.计数值宽度为16位或32位,计数单位为16NS

答案:

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