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、client-server
B、browser-server
C、connectionless
D、P2P
参考答案：
A、client-server
● 参考解析
