What is the initial action of a UDP port scan?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Prepare for the Nmap and ZenMap Tests. Access flashcards and multiple choice questions, with hints and explanations for each question. Ensure success in your exam!

Multiple Choice

What is the initial action of a UDP port scan?

Explanation:
UDP scans start by sending a UDP datagram to each target port. Since UDP is connectionless, there’s no handshake to establish first. What you get next depends on the port: an ICMP Port Unreachable may come back if a port is closed, a UDP reply might come from an open service, or you may get no reply at all if the port is filtered or the service doesn’t respond. The option to use UDP scan mode is a way to perform this type of probing, but the actual initial action is sending UDP packets to the ports.

UDP scans start by sending a UDP datagram to each target port. Since UDP is connectionless, there’s no handshake to establish first. What you get next depends on the port: an ICMP Port Unreachable may come back if a port is closed, a UDP reply might come from an open service, or you may get no reply at all if the port is filtered or the service doesn’t respond. The option to use UDP scan mode is a way to perform this type of probing, but the actual initial action is sending UDP packets to the ports.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy