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So let's have a look at the network sniffing methods first, we're going to learn how to listen to the

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network traffic and how to use some tools such as TCP Dump and Wireshark.

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During the penetration test, we listen to the network traffic for many good reasons, first of all,

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it's possible to obtain the clear text, critical information such as usernames, passwords, instant

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messages, emails and all that.

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We can check to see if the scans were correctly.

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And some controls can be seen by listening to the network interface, such as if the scan parameters

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are set correctly, packets are properly exported from the network interface and responses are received.

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Listening to the traffic, using passive scan methods, we can collect information about IP addresses,

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services running on server systems and protocols and technologies used in network infrastructures,

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et cetera, et cetera.