— I don't feel like going out. Why don't we just stay home and watch TV instead?

—      You promised to take me out for dinner on my birthday.     [ ]

A. Great!    

B. Why me?      

C. Come on!    

D. Not at all.

在客户机/服务器模型中，标识一台主机中的特定服务通常使用______。

A．主机的域名

B．主机的IP地址

C．主机的MAC地址

D．TCP和UDP端口号