Which function is used to send packets at Layer 2 when you have an L2 header, and does not wait for a response?

• A. Sendp()
• B. Send()
• C. sr()
• D. srp()

Answer: (A)

Sending at the data-link layer means you’re delivering a raw frame with its L2 header (MAC destination, MAC source, EtherType, payload) directly to the network interface. The function that does this is designed to inject those pre-built Ethernet frames without involving the IP stack or awaiting replies. It transmits the frame as-is and doesn’t wait for any response. That’s exactly what you want when you have an L2 header and you don’t expect a reply.

The other options are used for different scenarios: one operates at Layer 3 and builds IP packets, so it’s not appropriate for raw L2 frames; the remaining two are pairings for send-and-receive workflows, which intentionally wait for responses, not suitable when you only want to send a frame without awaiting a reply.