Which command is used to check if another host on a TCP/IP network is reachable?

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The command used to check if another host on a TCP/IP network is reachable is "Ping." This command sends Internet Control Message Protocol (ICMP) Echo Request messages to the target host and waits for an Echo Reply. If the target host responds, it indicates that the host is reachable on the network. The round-trip time can also be measured, providing additional information about latency. Because of its functionality, "Ping" is commonly utilized for troubleshooting network connectivity issues.

In contrast, "Trace" typically refers to the "traceroute" command, which is used to trace the path data takes to reach a destination but does not specifically verify reachability in a straightforward way. "Netstat" is a networking utility that displays network connections, routing tables, and interface statistics, rather than testing connectivity. "Nslookup" is a network utility used for querying the Domain Name System (DNS) to obtain domain name or IP address mapping, which does not serve the purpose of checking reachability on the network.

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