Question: 3.What does a packet sniffer do? Why can sniffers be dangerous? Give an example of sniffer software. 4.What is port scanning? What kind of information

3.What does a packet sniffer do? Why can sniffers be dangerous? Give an example of sniffer software.

4.What is port scanning? What kind of information can be obtained from port scanning? Give an example of port scanning tools.

5.What is the function of ping command? What is ping floods? How to prevent it?

6.What is a SYN flood attack? How does it abuse the TCP three-way handshake?

7.List three security improvement for DNS attacks.

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