There are two main types of packet sniffers:Ī hardware packet sniffer is designed to be plugged into a network and to examine it.
Packet sniffing ignores this standard practice and collects all, or some of the packets, regardless of how they are addressed. Under normal operating conditions, if a node sees a packet that is not addressed to it, the node ignores that packet and its data. To ensure data is not mixed up, each packet is assigned an address that represents the intended destination of that packet.Ī packet’s address is examined by each network adapter and connected device to determine what node the packet is destined for. Because a network’s infrastructure is common to many nodes, packets destined for different nodes will pass through numerous other nodes on the way to their destination. The defined length and shape allows the data packets to be checked for completeness and usability. Networks can also be a combination of both types.Īs nodes send data across the network, each transmission is broken down into smaller pieces called packets. The connections can be physical with cables, or wireless with radio signals. The network connection allows data to be transferred between these devices. A network is a collection of nodes, such as personal computers, servers, and networking hardware that are connected.
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