Which command is used to obtain a new IP address from the network host?

The command used to obtain a new IP address from a network host is indeed the command that starts with "ipconfig /renew." This command is typically employed in Windows operating systems to request a new IP address from a DHCP (Dynamic Host Configuration Protocol) server. When executed, it sends a request to the DHCP server to lease a new IP address for the system, which is particularly useful in situations where the existing IP address is invalid, expired, or if a device is being connected to a different network.

In contrast, the other commands serve different purposes: "ping localhost" is used to test the local network stack and confirm that the network interface is functioning; "netstat /all" provides information about current network connections and listening ports but does not interact with the DHCP server; and the "tracert" command is designed to trace the route packets take to reach a specific target IP address, also not related to renewing an IP lease. Understanding these differences reinforces why "ipconfig /renew" is the correct command for obtaining a new IP address from the network host.