It implements List and is thread-safe, but its iterators will not throw ConcurrentModificationException and do not require any additional locking during traversal.
An option that refers to a packet at the end of the queue may require a full listtraversal 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。
3
Traversal string: The '! 'delimiter is not valid in a parameter list.