the usual way to ensure reliable delivery is to provide the（ ）with some feedback aboutwhat is happening at the other end of the line.（2008年下半年网络工程师上午真题解析）
the usual way to ensure reliable delivery is to provide the（ ）with some feedback aboutwhat is happening at the other end of the line.（2008年下半年网络工程师上午真题解析）
A、receiver
B、controller
C、sender
D、customer
参考答案：C
参考解析：正在整理中,欢迎在文下评论区解答,谢谢！