impenetrability
n. 不能透過,不能穿過
1. resistance to penetration by a liquid
2. incomprehensibility by virtue of being too dense to understand
Part of the problem is that the Internet was developed for interoperability, not impenetrability.
造成這個問題的部分原因是因特網當初為互用性而不是為抗入侵能力開發的.