An option that refers to a packet at the end of the queue may require a full list traversal by the receiving TCP stack in order to identify which packet the option refers to.
一个指向队列末尾包的选项可能会迫使接收方的TCP协议栈遍历整个队列以判断此选项指向哪一个包。
The instructions PUSH and QUEUE correspond to LIFO and FIFO operations on the stack.
指令push和QUEUE对应的是对栈的LIFO和FIFO操作。
If you pop the first item of a list, you have a queue; whereas, if you pop the last item of a list, you have a stack, as shown in Listing 8.
如果弹出list的第一项，则是一个队列；反之，如果弹出list的最后一项，则是一个堆栈，如清单8所示。
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