Which of the following is NOT a type of ping option available during host discovery?

In the context of host discovery, the types of ping options are used to identify and test the reachability of hosts within a network. Each of the listed options represents a method of probing hosts.

ARP ping, or Address Resolution Protocol ping, works at the data link layer to resolve IP addresses to MAC addresses. It can be particularly effective in local area networks where direct MAC addressing can quickly reveal if a host is present.

ICMP ping, using the Internet Control Message Protocol, is the classic method for network reachability. It sends echo requests to a target IP and waits for an echo reply, determining whether a host is online.

UDP ping refers to sending UDP packets to a target port. Unlike the more common ICMP ping, which expects replies, UDP ping can also be used to gauge the presence of services running on specific ports, helping identify active hosts based on service functionality.

HTTP ping, although it might sound like a method related to reachability, is not a standard ping option used specifically for host discovery in terms of classic networking definitions. Instead, it typically involves making an HTTP request to verify if a web server is up and running, rather than simply checking for the existence of a host.

Thus, HTTP ping does not fit into the typical