How does Tcpdump function?

How does Tcpdump function?

• A. It prevents traffic
• B. It blocks packets
• C. It displays TCP/IP and other packets transmitted or received over a network.
• D. It encrypts traffic

Answer: (C)

Tcpdump is a network packet analyzer that captures and displays the packets traveling on a network interface. It uses a capture library (libpcap) to sniff traffic, often in promiscuous mode, and prints a readable summary of each packet’s headers—covering protocols like IP, TCP, UDP, ICMP, and more. You can apply filters so you only see specific traffic, which makes it a powerful tool for diagnosing issues, verifying protocol behavior, or understanding network flows. This is why the correct choice fits best: it describes the tool as something that shows the actual packets being transmitted or received, not something that stops, alters, or encrypts the traffic.

Tcpdump is a network packet analyzer that captures and displays the packets traveling on a network interface. It uses a capture library (libpcap) to sniff traffic, often in promiscuous mode, and prints a readable summary of each packet’s headers—covering protocols like IP, TCP, UDP, ICMP, and more. You can apply filters so you only see specific traffic, which makes it a powerful tool for diagnosing issues, verifying protocol behavior, or understanding network flows.

This is why the correct choice fits best: it describes the tool as something that shows the actual packets being transmitted or received, not something that stops, alters, or encrypts the traffic.