unreachable destination

基本解释

You can probably guess what a "destination unreachable attack" will be like.
您可能會猜想“目的地不可到達攻擊”會是什麽情形。
Otherwise, the messages would remain on the Exchange server mail queue as "destination unreachable."
否則，由於 “destination unreachable”，郵件會畱在 Exchange 服務器郵件隊列中。
If an intruder gained access to a host in Network 10.1.0.0, he could broadcast a "Destination Unreachable Message" stating that Gateway G is not reachable to all hosts in the network he is in.
如果入侵者獲得了網絡 10.1.0.0 中一台主機的訪問權，那麽，他可以廣播一條“目的地不可到達消息”，聲明網關 G 對於他所在網絡的所有主機是不可到達的。