ping一直出现 request timed

ping一直出现 request timed Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.Request timed out.全是这个没一个重复的.我的机器是怎么回事谁可以告诉我啊.