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DOS version of pingVarious and developersInitial release1983; 37 years ago ( 1983),Ping is a administration used to test the reachability of a on an (IP) network. It is available for virtually all operating systems that have networking capability, including most embedded network administration software.Ping measures the for messages sent from the originating host to a destination computer that are echoed back to the source.
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The name comes from terminology that sends a of sound and listens for the echo to detect objects under water.Ping operates by sending (ICMP) echo request to the target host and waiting for an ICMP echo reply. The program reports errors, and a statistical summary of the results, typically including the minimum, maximum, the round-trip times, and of the mean.The of the ping utility and its output vary between the numerous implementations. Options may include the size of the payload, count of tests, limits for the number of network hops that probes traverse, interval between the requests and time to wait for a response. Many systems provide a companion utility ping6, for testing on (IPv6) networks, which implement. Contents.History The ping utility was written by in December 1983 during his employment at the, now the. A remark by on using ICMP echo packets for IP network diagnosis and measurements prompted Muuss to create the utility to troubleshoot network problems. The author named it after the sound that makes, since its methodology is analogous to sonar's echo location.
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The acronym Packet InterNet Groper for PING has been used for over 30 years, and although Muuss says that from his point of view PING was not intended as an acronym, he has acknowledged Mills’ expansion of the name. The first released version was; all subsequent versions have been licensed under the. Ping was first included in.
Sims 4 seasons origin code. Ping 过程 如上图,假设我们是Host A,现在需要访问Host C,在访问之前,我们需要知道是否与Host C网络相通,此时我们就用到了ping. 此处来个小插曲,网络故障时候,我们一般采用四个步骤: 1. Ping localhost: localhost的IP地址一般为127.0.0.1. TCP/IP-PING包大小分析 在排查网络错误的过程中,PING是我们必不可少的排错手段,PING是基于ICMP协议,但你真的了解PING么?列如: 1.电脑PING一个包,抓包得到的数据包大小是多少字节,请求与回应的包结构是什么样的呢?.
The version was developed by Erick Engelke and is licensed under the. Tim Crawford developed the version. It is licensed under the.prescribes that any host must process ICMP echo requests and issue echo replies in return. Generic composition of an ICMP packet:.
IPv4 Header (in blue): protocol set to 1 (ICMP) and set to 0. IPv6 Header (in blue): Next Header set to 58 (ICMP6). ICMP Header (in red):. Type of ICMP message (8 bits). Code (8 bits). Checksum (16 bits), calculated with the ICMP part of the packet (the is not used). It is the 16-bit one's complement of the one's complement sum of the ICMP message starting with the Type field.
Header Data (32 bits) field, which in this case (ICMP echo request and replies), will be composed of identifier (16 bits) and sequence number (16 bits). ICMP Payload: payload for the different kind of answers; can be an arbitrary length, left to implementation detail.
However, the packet including IP and ICMP headers must be less than the of the network or risk being.Echo request The echo request ('ping') is an / message.3031Type = 8(IPv4, ICMP) 128(IPv6,ICMP6)Code = 0ChecksumIdentifierSequence NumberPayloadThe Identifier and Sequence Number can be used by the client to match the reply with the request that caused the reply. In practice, most Linux systems use a unique identifier for every ping process, and sequence number is an increasing number within that process.
Army Research Laboratory. From the original on 25 October 2019. Retrieved 8 September 2010. My original impetus for writing PING for 4.2a BSD UNIX came from an offhand remark in July 1983 by Dr. I named it after the sound that a sonar makes, inspired by the whole principle of echo-location. From my point of view PING is not an acronym standing for Packet InterNet Grouper, it's a sonar analogy.
However, I've heard second-hand that Dave Mills offered this expansion of the name, so perhaps we're both right. (1994). A Quarter Century of UNIX. (December 1983).:. Retrieved 26 November 2019.
8 August 2019 – via GitHub. Retrieved 19 March 2012. Every host MUST implement an ICMP Echo server function that receives Echo Requests and sends corresponding Echo Replies. 13 January 2000. Archived from on 4 August 2016. Retrieved 4 December 2014.
Retrieved 2 February 2014. Retrieved 20 December 2010.Further reading. Dyson, Peter (1995). Mastering OS/2 Warp.
John Paul Mueller (2007). Windows Administration at the Command Line for Windows Vista, Windows 2003, Windows XP, and Windows 2000. McElhearn, Kirk (2006). The Mac OS X Command Line: Unix Under the Hood.External links Wikibooks has a book on the topic of:. – System Administration Commands Reference.
– System Manager's. – Reference, Issue 7 from.
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