QoS中的PQ具有哪些特征()。A、可以使用ACL对报文进行分类,并放入相应的队列B、报文丢弃策略采用Tail Drop机制,且只有这一种机制C、队列长度可以设置为0,表示该队列无穷大,即进入该队列的报文不会被Tail Drop机制丢弃,除非内存耗尽了D、队列内部使用FIFO逻辑E、当从队列调度报文时,先从高优先级的队列调度报文F、Middle队列的优先级比Normal队列低
QoS中的PQ具有哪些特征()。
- A、可以使用ACL对报文进行分类,并放入相应的队列
- B、报文丢弃策略采用Tail Drop机制,且只有这一种机制
- C、队列长度可以设置为0,表示该队列无穷大,即进入该队列的报文不会被Tail Drop机制丢弃,除非内存耗尽了
- D、队列内部使用FIFO逻辑
- E、当从队列调度报文时,先从高优先级的队列调度报文
- F、Middle队列的优先级比Normal队列低
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