A Sniffer is an application that can capture networks packets. Sniffers are also Known as network protocol analyzers.
Objective of sniffing is to steal:
Objective of sniffing is to steal:
1. Password (From Email, Website, FTP, TELNET etc)
2. Email Text
3. Files in transfer
A network sniffer is software or hardware device that is used to observe traffic as it passes through a network on shared broadcast media.
These devices can be used to view all traffic, or it can target a specific protocol, services, or even string of characters like logins.
Generally, the network device is designed to ignored all traffic that is not destined for that computer, Network sniffers attacks ignore this friendly agreement and observe all traffic on the networksm whether destined for that computer or others.
Some network sniffers are not just designed to observe all traffic but also modify them.Network administrators for monitoring networks performancecan use network sniffers.
The can be used to perform traffic analysis, for example, in order to determine what type of
traffic is most commonly carried on the network and to determine which segments are most active.They can also be used for network bandwith analysis and to troubleshoot certain problems such as duplicate MAC adresses.
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