What is one function of the PING utility?

The PING utility primarily functions to check the reachability of a host on a network, which involves sending Internet Control Message Protocol (ICMP) echo request packets to the destination and waiting for echo reply packets. This process helps ascertain whether a host is alive and can respond to network requests. It is a fundamental diagnostic tool used in troubleshooting network connectivity issues, ensuring that devices are operational and can communicate over the network.

Other options present functions that are not aligned with what PING specifically does. Modifying network configurations pertains to tools designed for altering settings on devices, securing data transmissions involves encryption and protocols designed to protect data, while analyzing network vulnerabilities pertains to security assessment tools aimed at identifying potential weaknesses in a network. Thus, the role of PING as a reachability test is distinct and essential for basic network diagnostics.