Which function sends a packet and waits to receive a response from the target?

• A. send()
• B. srp()
• C. sr()
• D. sr1()

Answer: (C)

To collect responses after sending a crafted packet, use the send-and-receive function provided by the tool. This function transmits the packet and then waits for replies, collecting all the responses that come back. It can handle multiple responders, returning a pair of results: the responses that were received and those that did not reply.

This is why the chosen option is the best fit: it embodies the typical send-and-wait-for-replies behavior across potentially multiple targets. If you only wanted the first reply, another function would be more appropriate, but for gathering all responses to a single probe, this function is the standard approach.

In contrast, sending alone doesn’t wait for or capture replies; a function designed to return just a single reply would limit you to the first response, and a layer-2 variant would operate at a different protocol layer and has different expectations about the kinds of responses and the structure returned.