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Practical Packet Analysis, 2nd Edition by Chris Sanders

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Chapter 2. Tapping into the Wire

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A key decision for effective packet analysis is where to position a packet sniffer to appropriately capture the data. This is most often referred to by packet analysts as sniffing the wire, tapping the network, or tapping into the wire. Simply put, this is the process of placing a packet sniffer on a network in the correct physical location.

Unfortunately, sniffing packets is not as simple as plugging a laptop into a network port and capturing traffic. In fact, it is sometimes more difficult to place a packet sniffer on a network’s cabling system than it is to actually analyze the packets.

The challenge with sniffer ...

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