问题：
[单选题] Secure Shell (SSH) is a cryptographic network protocol for （ ） remote login and other secure network services over an（ ）network.The standard（ ）port for SSH is 22. The best known example application is
A、Windows
B、Unix-like
C、MS-DOS
D、Graphical
参考答案：
B、Unix-like
● 参考解析
