QUESTION 86
Which two statements are true about RED? (Choose two.)
A. RED randomly drops packets before the queue becomes full.
B. RED is always useful, without dependency on flow.
C. RED increases the drop rate as the average queue size increases.
D. RED has a per-flow intelligence.
Correct Answer: AC
Section: (none)
Explanation
red,一直都纠结是random early detect还是random early drop,感觉应该是早期检测随机丢弃才好。不计较文字了。
就是在拥塞之前就会检测链路的负载程度,当达到设定值时就开始进行随机丢弃,并随着负载提高,相应增大丢弃率,虽然还未产生拥塞。
red主要是防止或减少大量的连续丢包。