The cyber domain of computers and related electronic activities is a complex man-made environment, and human adversaries are purposeful and intelligent. Mountains and oceans are hard to move, but portions of cyberspace can be turned on and off by throwing a switch.
电脑及相关电子活动的网络域名构成了纯粹人造的复杂环境，上述环境中的人类对手高度智能化而且有针对性。山脉和海洋很难移动，但网络空间却可以借助开关关上和打开。电子的全球移动远比大型船舶的远距离移动更为廉价和快速。