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                            [TOC]

## 引言
“ping”這個名字源于聲納定位操作。Ping程序由MikeMuuss編寫，目的是為了測試另一臺主機是否可達。該程序發送一份ICMP回顯請求報文給主機，并等待返回ICMP回顯應答

**ICMP 是什么?**
ICMP經常被認為是IP層的一個組成部分。它傳遞差錯報文以及其他需要注意的信息。ICMP報文通常被IP層或更高層協議(TCP或UDP)使用。一些ICMP報文把差錯報文返回給用戶進程
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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