A request for an electronic "echo" or response from another computer or server is known as what?

The correct answer is "Ping" because it refers to a utility used to test the reachability of a host on an Internet Protocol (IP) network. When a "ping" request is sent, the sender transmits an Internet Control Message Protocol (ICMP) echo request to the target host. In response, the target host sends back an ICMP echo reply, thereby confirming its availability and providing a means to measure the round-trip time for messages sent to that host.

This process is essential in networking for diagnosing connectivity issues and latency problems. It helps network administrators determine whether a particular device is responding and how quickly it can respond to requests. In contrast, uploading and downloading refer to the transfer of files to and from a server, and streaming pertains to the continuous transmission of audio or video content over the internet, which does not specifically involve an echo request or response mechanism.