试题与答案

中兴DWDM产品通过B1、J0字节的检测,可以准确定位故障发生位置,区分SDH段和D

题型:判断题

题目:

中兴DWDM产品通过B1、J0字节的检测,可以准确定位故障发生位置,区分SDH段和DWDM段的故障。

答案:

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题型:单项选择题

(41) is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast group.
(42) is an error detection code that most data communication networks use.
(43) is an interior gateway protocol that uses a distance vector algorithm to propagate routing information.
(44) is a transfer mode in which all types of information are organized into fixed form cells on an asynchronous or non-periodic basis over a range of media.
(45) is an identifier of a web page.

A.ICMP

B.SMTP

C.IGMP

D.ARP

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