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1. PING is a program that is used to check communication between computers in a network through TCP / IP. PING will send Internet Control Message Protocol (ICMP) Echo Request messages to the ip address of the computer and request a response from the computer.
2. If the target computer to give a response then the computer provides information such as example PING report that you are: bytes = 32 time = 30ms TTL = 123. Bytes shows big request packet that is sent. Time shows the value of “round trip delay” (also referred to as the delay or latency), which indicates the time the packet you send to the computer. This value is calculated by dividing the difference between two-time PING packet is sent with the start time from PING response packet received. While the TTL value is “Time-To-Live” that is used to prevent the circular routing in a network. With the initial TTL value is 128 with the end of the TTL value can be calculated are the number of hop from computer to computer of origin purposes. Each time through a packet PING ip address then its TTL value would be reduced one. So if the TTL value reaches zero, packet will discard PING / PING drop and the results show: TTL expired in transit
3. PING purposes are as follows: a. knowing the status of up / down the computer in the network. We can check whether a computer up / down using the PING command, if the computer is to give response to the PING command that we give then said that the computer is up or live.
4. Monitor the availability status of the computers in the network. PING can be used as a monitoring tool availabilities computer in a network that is one indicator of the quality of the network to PING periodically on a computer. The little downtime, the better the quality of the network.
5. Knowing response a communication network. The amount of delay or latency values were reported by PING becomes responsive indication of how communication occurs with the computer. The greater the value of delay indicates that the slow response given. So that the value of this delay can also be used as an indicator the quality of the network.

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