在所有的软件和系统开发中都存在着通过语言、硬件、网络拓扑、通讯协议和底层架构等选择所带来的重要约束。

In all software and system development there are important constraints implied by the choice of languages, hardware, network topology, communications protocols and infrastructure, and so on.

youdao

某种可能使用 IP 安全性协议 (IPSEC) 的网络级加密形式（例如虚拟专用网 (VPN)）是最可取的解决方案，虽然也有其他合理的选择。

Some form of network-level encryption, such as a Virtual Private Network (VPN), perhaps using IP Security Protocol (IPSEC), is the most obvious solution, although there are other reasonable choices.

youdao

选择网络传输方法，并在低级协议(如套接字、RMI、URL和文件等等)之中选择。

Select network transport method, choosing among low-level protocols such as sockets, RMI, URLs, files, and so on.

youdao