CCNP系列認證CCNP(642-311)單項選擇題每日一練(2019.01.10)

來源：考試資料網(wǎng)

1 SONET Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of （）.

2 A customer has 2 DS1s to add between adjacent nodes in a UPSR ring. What type of circuit should you recommend?（）

3 Scrambling of SONET signals is done to （）.

4 What is the phenomenon called where different wavelengths of light travel at different speeds?（）

5 If node 2 is accepting line timing from node 1, node 2 will send （）to node 1 as its SSM message.